Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2018	Oct. 18, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	FCN
Entity Registrant Name	FTI CONSULTING INC
Entity Central Index Key	0000887936
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		38,387,013

Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 505,867,000	$ 189,961,000
Accounts receivable:
Billed receivables	477,408,000	390,996,000
Unbilled receivables	366,997,000	312,569,000
Allowance for doubtful accounts and unbilled services	(221,008,000)	(180,687,000)
Accounts receivable, net	623,397,000	522,878,000
Current portion of notes receivable	31,318,000	25,691,000
Prepaid expenses and other current assets	45,931,000	55,649,000
Total current assets	1,206,513,000	794,179,000
Property and equipment, net	82,476,000	75,075,000
Goodwill	1,175,929,000	1,204,803,000
Other intangible assets, net	36,729,000	44,150,000
Notes receivable, net	89,342,000	98,105,000
Other assets	37,849,000	40,929,000
Total assets	2,628,838,000	2,257,241,000
Current liabilities
Accounts payable, accrued expenses and other	116,222,000	94,873,000
Accrued compensation	286,149,000	268,513,000
Billings in excess of services provided	38,178,000	46,942,000
Current portion of long-term debt, net	296,851,000	0
Total current liabilities	737,400,000	410,328,000
Long-term debt, net	263,317,000	396,284,000
Deferred income taxes	153,045,000	124,471,000
Other liabilities	123,601,000	134,187,000
Total liabilities	1,277,363,000	1,065,270,000
Commitments and contingent liabilities (Note 11)
Stockholders' equity
Preferred stock, $0.01 par value; shares authorized — 5,000; none outstanding	0	0
Common stock, $0.01 par value; shares authorized — 75,000; shares issued and outstanding — 38,356 (2018) and 37,729 (2017)	384,000	377,000
Additional paid-in capital	315,720,000	266,035,000
Retained earnings	1,173,003,000	1,045,774,000
Accumulated other comprehensive loss	(137,632,000)	(120,215,000)
Total stockholders' equity	1,351,475,000	1,191,971,000
Total liabilities and stockholders' equity	$ 2,628,838,000	$ 2,257,241,000

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	38,356,000	37,729,000
Common stock, shares outstanding (in shares)	38,356,000	37,729,000

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenues	$ 513,012,000	$ 448,962,000	$ 1,522,884,000	$ 1,340,021,000
Operating expenses
Direct cost of revenues	336,477,000	294,851,000	987,912,000	907,994,000
Selling, general and administrative expenses	117,448,000	104,161,000	347,473,000	319,970,000
Special charges	0	0	0	30,074,000
Amortization of other intangible assets	1,975,000	2,882,000	6,297,000	7,797,000
Operating expenses	455,900,000	401,894,000	1,341,682,000	1,265,835,000
Operating income	57,112,000	47,068,000	181,202,000	74,186,000
Other income (expense)
Interest income and other	1,400,000	1,103,000	2,074,000	3,300,000
Interest expense	(7,246,000)	(6,760,000)	(20,073,000)	(18,811,000)
Gain on sale of business	13,031,000	0	13,031,000	0
Other income (expense)	7,185,000	(5,657,000)	(4,968,000)	(15,511,000)
Income before income tax provision	64,297,000	41,411,000	176,234,000	58,675,000
Income tax provision	19,964,000	9,197,000	49,347,000	17,601,000
Net income	$ 44,333,000	$ 32,214,000	$ 126,887,000	$ 41,074,000
Earnings per common share — basic (in dollars per share)	$ 1.19	$ 0.86	$ 3.43	$ 1.05
Earnings per common share — diluted (in dollars per share)	$ 1.14	$ 0.85	$ 3.32	$ 1.03
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments, net of tax expense of $373, $—, $373 and $—	$ (4,180,000)	$ 11,234,000	$ (17,417,000)	$ 28,778,000
Total other comprehensive income (loss), net of tax	(4,180,000)	11,234,000	(17,417,000)	28,778,000
Comprehensive income	$ 40,153,000	$ 43,448,000	$ 109,470,000	$ 69,852,000

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Foreign currency translation adjustments, tax expense	$ 373	$ 0	$ 373	$ 0

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance (in shares) at Dec. 31, 2017	37,729,000	37,729,000
Beginning Balance at Dec. 31, 2017	$ 1,191,971	$ 377	$ 266,035	$ 1,045,774	$ (120,215)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	126,887			126,887
Other comprehensive income:
Cumulative translation adjustment	(17,417)				(17,417)
Issuance of common stock in connection with:
Exercise of options (in shares)		853,000
Exercise of options	34,169	$ 9	34,160
Restricted share grants, less net settled shares of XX (in shares)		307,000
Restricted share grants, less net settled shares of 51	(2,666)	$ 3	(2,669)
Stock units issued under incentive compensation plan	1,059		1,059
Purchase and retirement of common stock (in shares)		(533,000)
Purchase and retirement of common stock	(29,220)	$ (5)	(29,215)
Cumulative effect due to adoption of new accounting standard	342			342
Conversion feature of convertible senior notes due 2023, net	34,131		34,131
Share-based compensation	$ 12,219		12,219
Ending Balance (in shares) at Sep. 30, 2018	38,356,000	38,356,000
Ending Balance at Sep. 30, 2018	$ 1,351,475	$ 384	$ 315,720	$ 1,173,003	$ (137,632)

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (Parenthetical) shares in Thousands	9 Months Ended
	Sep. 30, 2018 shares
Statement of Stockholders' Equity [Abstract]
Restricted share grants, net settled shares (in shares)	51

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities
Net income	$ 126,887	$ 41,074
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,548	23,768
Amortization and impairment of other intangible assets	6,297	7,797
Acquisition-related contingent consideration	355	1,547
Provision for doubtful accounts	11,951	10,510
Non-cash share-based compensation	12,219	12,888
Gain on sale of business	(13,031)	0
Amortization of debt discount and issuance costs	2,604	1,489
Other	751	297
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, billed and unbilled	(130,369)	(72,640)
Notes receivable	2,659	8,449
Prepaid expenses and other assets	(174)	935
Accounts payable, accrued expenses and other	16,150	16,823
Income taxes	28,922	8,876
Accrued compensation	7,207	(34,123)
Billings in excess of services provided	(10,704)	(3,657)
Net cash provided by operating activities	86,272	24,033
Investing activities
Proceeds from sale of business	50,283	0
Purchases of property and equipment	(27,841)	(20,021)
Other	741	74
Net cash provided by (used in) investing activities	23,183	(28,876)
Financing activities
Borrowings (repayments) under revolving line of credit, net	(100,000)	95,000
Proceeds from issuance of convertible notes	316,250	0
Payments of debt issue costs	8,048	0
Deposits	2,327	3,585
Purchase and retirement of common stock	(29,220)	(155,285)
Net issuance of common stock under equity compensation plans	31,241	(2,354)
Payments for acquisition-related contingent consideration	(3,029)	(79)
Net cash provided by (used in) financing activities	209,521	(59,133)
Effect of exchange rate changes on cash and cash equivalents	(3,070)	5,779
Net increase (decrease) in cash and cash equivalents	315,906	(58,197)
Cash and cash equivalents, beginning of period	189,961	216,158
Cash and cash equivalents, end of period	505,867	157,961
Supplemental cash flow disclosures
Cash paid for interest	13,428	12,424
Cash paid for income taxes, net of refunds	20,324	8,742
Non-cash investing and financing activities:
Issuance of stock units under incentive compensation plans	$ 1,059	$ 1,547

Basis of Presentation and Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The unaudited condensed consolidated financial statements of FTI Consulting, Inc., including its consolidated subsidiaries (collectively, the “Company,” “we,” “our” or “FTI Consulting”), presented herein, have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and under the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial information. Some of the information and footnote disclosures normally included in annual financial statements have been condensed or omitted pursuant to those rules and regulations. Certain prior period amounts have been reclassified to conform to the current period presentation. In management’s opinion, the interim financial statements reflect all adjustments that are necessary for a fair presentation of the results for the interim periods presented. All adjustments made were normal recurring accruals. Results of operations for the interim periods presented herein are not necessarily indicative of results of operations for a full year. These financial statements should be read in conjunction with the consolidated financial statements and the notes thereto contained in our Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC.

Revenue Recognition

As of January 1, 2018, we adopted Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers ("ASC 606"), which impacts the timing of when certain types of revenue will be recognized. Revenues are recognized when we satisfy a performance obligation by transferring goods or services promised in a contract to a customer, in an amount that reflects the consideration that we expect to receive in exchange for those goods and services. Performance obligations in our contracts represent distinct or separate service streams that we provide to our customers.

We evaluate our revenue contracts with customers based on the five-step model under ASC 606: (1) identify the contract with the customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to separate performance obligations; and (5) recognize revenues when (or as) each performance obligation is satisfied. If, at the outset of an arrangement, we determine that a contract with enforceable rights and obligations does not exist, revenues are deferred until all criteria for an enforceable contract are met.

We generate the majority of our revenues by providing consulting services to our clients. Most of our consulting service contracts are based on one of the following types of arrangements:

•

Time and expense arrangements require the client to pay us based on the number of hours worked at contractually agreed-upon rates. We recognize revenues for these arrangements based on hours incurred and contracted rates utilizing a right-to-invoice practical expedient, because we have a right to consideration for services completed to date. When a time and expense arrangement has a not-to-exceed or "cap" amount and we expect to perform work in excess of the cap, we recognize up to the cap amount specified by the client, based on the efforts or hours incurred as a percentage of total efforts or hours expected to be incurred (e.g. proportional performance method). Certain time and materials arrangements may be subject to third party approval, e.g. a court or other regulatory institution, with interim billing and payments made and received based upon preliminarily agreed upon rates. We record revenues for the portion of our services based on our assessment of the expected probability of amounts ultimately to be agreed upon by the court or regulator. These assessments are made on a case-by-case basis depending on the nature of the engagement, client economics, historical experience and other appropriate factors.


•	Fixed fee arrangements require the client to pay a pre-established fee in exchange for a predetermined set of professional services. We recognize revenues for these arrangements based on the proportional performance related to individual performance obligations within each arrangement, however, these arrangements generally have one performance obligation.

•

Performance based or contingent arrangements represent forms of variable consideration. In these arrangements, our fees are based on the attainment of contractually defined objectives with our client, such as completing a business transaction or assisting the client in achieving a specific business objective. When our performance obligation(s) are satisfied over time, we determine the transaction price based on the expected probability of achieving the agreed-upon outcome and recognize revenues earned to date by applying the proportional performance method. These arrangements include conditional payments, commonly referred to as success fees, which were previously recognized when the cash was collected.

In addition, we generate certain revenues from our Technology segment that are based on units of data stored or processed. Unit based revenues are recognized as services are provided, based on either the amount of data stored or processed, the number of concurrent users accessing the information, or the number of pages or images processed for a client, and agreed-upon per unit rates. We also generate revenues from our on-premise software licenses. Software license revenues are generally recognized at a point in time when the customer acceptance occurs, in accordance with the provision of the arrangements.

Certain of our time and expense and fixed fee billing arrangements may include client incentives in the form of volume-based discounts, where if certain fee levels are reached, the client can receive future services at a discounted hourly rate. Contracts with customers that have a prospective discounted pricing option based on predetermined volume thresholds are evaluated to determine whether they include a material right, which is an option that provides a customer the right to acquire free or discounted goods or services in the future. If the option provides a material right to the customer, we allocate a portion of the transaction price to the material right and defer revenues during the pre-discount period, compared to our previous practice of recognizing the reduction in revenues when customers became eligible to receive the volume discount.

Reimbursable expenses, including those relating to travel, out-of-pocket expenses, outside consultants and other outside service costs, are generally included in revenues, and an equivalent amount of reimbursable expenses is included in costs of services in the period in which the expense is incurred.

2023 Convertible Notes

On August 20, 2018, we issued 2.0% convertible senior notes due 2023 ("2023 Convertible Notes") with an aggregate principal amount of $316.3 million, payable semiannually in arrears on February 15th and August 15th of each year, beginning on February 15, 2019. The 2023 Convertible Notes will mature on August 15, 2023, unless earlier converted or repurchased. Upon conversion, the 2023 Convertible Notes may be settled, at our election in cash, shares of our common stock or a combination of cash and shares of our common stock.

We separately recorded the liability and equity components of the 2023 Convertible Notes. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the 2023 Convertible Notes. The equity component is not remeasured as long as it continues to meet the conditions for equity classification. The excess of the principal amount of the liability component over its carrying amount ("debt discount") is amortized to interest expense over the term of the 2023 Convertible Notes using the effective interest rate method.

We record debt issuance costs as an adjustment to the carrying amount of the related liability and equity components of our 2023 Convertible Notes. We amortize the debt discount and debt issuance costs on the liability component using the effective interest rate method over the expected life of the debt instrument.

Earnings Per Common Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Common Share

Basic earnings per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per common share adjusts basic earnings per common share for the effects of potentially dilutive common shares. Potentially dilutive common shares include the dilutive effects of shares issuable under our equity compensation plans, including stock options and restricted shares, each using the treasury stock method.

Because we expect to settle the principal amount of the outstanding 2023 Convertible Notes in cash, we use the treasury stock method for calculating the potential dilutive effect of the conversion feature on earnings per common share, if applicable. The conversion feature will have a dilutive impact on earnings per common share when the average market price of our common stock for a given period exceeds the conversion price of $101.38 per share. As we did not meet this threshold during the three and nine months ended September 30, 2018, any shares of common stock potentially issuable upon conversion of the 2023 Convertible Notes are excluded from the calculation of diluted earnings per share.



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Numerator — basic and diluted
Net income	$	44,333	$	32,214	$	126,887	$	41,074
Denominator
Weighted average number of common shares outstanding — basic	37,318		37,431		37,008		39,301
Effect of dilutive stock options	639		31		500		96
Effect of dilutive restricted shares	799		284		706		318
Weighted average number of common shares outstanding — diluted	38,756		37,746		38,214		39,715
Earnings per common share — basic	$	1.19	$	0.86	$	3.43	$	1.05
Earnings per common share — diluted	$	1.14	$	0.85	$	3.32	$	1.03
Antidilutive stock options and restricted shares	4		2,328		221		1,755

New Accounting Standards	9 Months Ended
New Accounting Standards	Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract]
New Accounting Standards	New Accounting Standards Adopted Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, Revenue from Contracts with Customers. On January 1, 2018, we adopted ASC 606 using the modified retrospective method and recorded an immaterial cumulative effect adjustment to the beginning balance of retained earnings for revenue contracts that existed at the adoption date. Under the modified retrospective method, prior year information has not been adjusted and continues to be reported under the accounting standards in effect for periods prior to the adoption date. We have not retroactively restated the existing contracts for modifications that occurred before January 1, 2018. See Note 1, "Basis of Presentation and Significant Accounting Policies" in Part I, Item 1, of this Quarterly Report on Form 10-Q for a description of the significant accounting policies and methods used in preparation of the Condensed Consolidated Financial Statements. See Note 4, “Revenues” in Part I, Item 1, of this Quarterly Report on Form 10-Q for the disclosures required under ASC 606. The adoption of ASC 606 had an immaterial impact on our Condensed Consolidated Statements of Comprehensive Income and Condensed Consolidated Balance Sheets and had no impact on our Condensed Consolidated Statements of Cash Flows. In March 2018, the FASB issued ASU 2018-05, Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (SEC Update), Income Taxes (Topic 740). ASU 2018-05 provides guidance regarding the recording of tax impacts where uncertainty exists, in the period of adoption of the 2017 U.S. Tax Cuts and Jobs Act (the “2017 Tax Act”), which allowed companies to reflect provisional amounts for those specific income tax effects of the 2017 Tax Act for which the accounting under ASC Topic 740 is incomplete but for which a reasonable estimate could be determined. During the nine months ended September 30, 2018, the Company has not recognized any material changes to the provisional amounts recorded in our 2017 Annual Report on Form 10-K in connection with the 2017 Tax Act. The accounting for the tax effects of the 2017 Tax Act will be finalized by the end of 2018 as we complete our federal and state tax returns and incorporate any additional guidance that may be issued by the U.S. tax authorities. Accounting Standards Not Yet Adopted In February 2016, the FASB issued ASU 2016-02, amended in some respects by subsequent ASU's (collectively “ASC 842”), which supersedes existing lease guidance. Under ASC 842, we will be required to record right-of-use assets and corresponding lease liabilities on the balance sheet, as well as to disclose key quantitative and qualitative information about leasing arrangements. This guidance is effective on a modified retrospective basis for reporting periods beginning after December 15, 2018, with early adoption permitted. We expect to adopt ASC 842 using a modified transition approach, effective January 1, 2019, under which we will recognize a cumulative-effect adjustment to retained earnings on the date of adoption. As permitted by the guidance, prior comparative periods will not be adjusted under this method. In addition, we will elect the package of practical expedients available under the guidance that allows us not to reassess whether a contract contains a lease, lease classification or initial direct costs. The Company's implementation plan is under way and includes an information system and business process change to accumulate the appropriate data in order to calculate and record the recognition of right-of-use assets, lease liabilities and the related expense recognition. We are creating an inventory of our existing portfolio of leases and continue to review other contracts to determine if they contain leases as defined by ASC 842. Our existing portfolio of leases is primarily composed of operating leases related to our offices. While this assessment continues, we are evaluating the effect of ASC 842 on our Condensed Consolidated Balance Sheets and related disclosures. We do not currently expect that the adoption of ASC 842 will have a material impact on our results of operations or cash flow presentation. In August 2018, the FASB issued ASU 2018-15, Internal-Use Software (Subtopic 350-40): Customer's accounting for implementation costs incurred in a cloud computing arrangement that is a service contract, which requires the Company to capitalize implementation costs of a hosting arrangement that is a service contract and expense those costs over the term of the hosting arrangement. The guidance is effective for annual and interim periods beginning after December 15, 2019 although early adoption is permitted. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.

Revenues	9 Months Ended
Revenues	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Revenues recognized during the current period may include revenues recognized from performance obligations satisfied or partially satisfied in previous periods. This primarily occurs when the estimated transaction price has changed based on a re-assessment of the expected probability of achieving the agreed-upon outcome for our performance based and contingent arrangements, resulting in a catch-up adjustment for service provided in previous periods. The aggregate amount of revenues recognized related to the catch-up adjustment due to a change in the transaction price during the three and nine months ended September 30, 2018 was $8.7 million and $12.9 million, respectively. Unfulfilled performance obligations represent the remaining contract transaction prices allocated to the performance obligations that are unsatisfied, or partially unsatisfied, and therefore revenues have not yet been recorded. Unfulfilled performance obligations primarily consist of the remaining fees not yet recognized under our proportional performance method for both our fixed fee arrangements, and the portion of performance-based and contingent arrangements that we have deemed probable. As of September 30, 2018, the aggregate amount of the transaction price allocated to unfulfilled performance obligations was $11.1 million, and we expect to recognize the majority of the related revenues over the next 18 months. We elected to utilize the optional exemption to exclude from this disclosure fixed fee and performance-based and contingent arrangements with an original expected duration of one year or less, and to exclude our time and expense arrangements for which revenues are recognized using the right to invoice practical expedient. Contract assets are defined as assets for which we have recorded revenue because we determined that it is probable that we will earn a performance based or contingent fee, but we are not yet entitled to receive our fees because certain events, such as completion of the measurement period or client approval, must occur. The contract asset balance was $2.9 million as of September 30, 2018 and immaterial as of December 31, 2017. Contract liabilities are defined as liabilities incurred when we have received consideration from a client but have not yet performed the agreed upon services. This may occur when we receive advance billings before delivery and acceptance of software licenses in our Technology segment and when clients pay us upfront fees before we begin work for them. The contract liability balance was immaterial as of September 30, 2018 and December 31, 2017.

Accounts Receivable and Allowance for Doubtful Accounts	9 Months Ended
Accounts Receivable and Allowance for Doubtful Accounts	Sep. 30, 2018
Allowance For Doubtful Accounts And Unbilled Services [Abstract]
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts Timing of revenue recognition often differs from the timing of billing to our customers. Generally, we transfer goods or services to a customer before the customer pays consideration or payment is due. If we have an unconditional right to invoice and receive payment for goods or services already provided, we record billed and unbilled receivables on our Condensed Consolidated Balance Sheets. Payment terms and conditions vary depending on the jurisdiction, market and type of service and whether regulatory or other third-party approvals are required. In addition, contracts may be negotiated per the client’s request, or at times we are asked to execute contracts in a form provided by customers that might include different terms. Our standard contract terms generally include a requirement of payment within 30 days where no contingencies exist. We record adjustments to the allowance for doubtful accounts and unbilled services as a reduction in revenues when there are changes in estimates of fee reductions, such as those fee reductions imposed by bankruptcy courts and other regulatory institutions for both billed and unbilled receivables. The allowance for doubtful accounts and unbilled services is also adjusted after the related work has been billed to the client and we discover that collectability is not reasonably assured. These adjustments are recorded to “Selling, general and administrative expenses” on the Condensed Consolidated Statements of Comprehensive Income. Our bad debt expense totaled $3.2 million and $12.0 million for the three and nine months ended September 30, 2018, respectively, and $4.5 million and $10.5 million for the three and nine months ended September 30, 2017, respectively.

Special Charges

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Special Charges

There were no special charges recorded during the three and nine months ended September 30, 2018 and the three months ended September 30, 2017.

During the nine months ended September 30, 2017, we recorded a special charge of $30.1 million. The charge includes the impact of certain targeted reductions in areas of each segment where we needed to realign our workforce with then-current business demand and in certain corporate departments where we were able to streamline support activities. In addition, certain strategic actions were taken to reduce our future real estate costs. The special charge included the following components:


•	$16.1 million of employee severance and other employee-related costs.


•	$12.4 million of exit costs associated with the curtailment of our lease on our executive office in Washington, D.C.


•	$1.6 million of other expenses, including costs related to disposing or closing several small international offices.

The following table details the special charges by segment for the nine months ended September 30, 2018 and 2017:



	Nine Months Ended September 30,
Special Charges by Segment	2018		2017
Corporate Finance & Restructuring	$	—	$	3,049
Forensic and Litigation Consulting	—		10,445
Economic Consulting	—		5,910
Technology	—		3,827
Strategic Communications	—		3,599
	—		26,830
Unallocated Corporate	—		3,244
Total	$	—	$	30,074

Research and Development Costs	9 Months Ended
Research and Development Costs	Sep. 30, 2018
Research and Development [Abstract]
Research and Development Costs	Research and Development Costs Research and development costs related to software development in our Technology segment totaled $2.0 million and $7.9 million for the three and nine months ended September 30, 2018, respectively, and $3.3 million and $11.8 million for the three and nine months ended September 30, 2017, respectively. Research and development costs are included in “Selling, general and administrative expenses” on the Condensed Consolidated Statements of Comprehensive Income.

Financial Instruments

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Financial Instruments

The following table presents the carrying amounts and estimated fair values of our financial instruments by hierarchy level as of September 30, 2018 and December 31, 2017.



	September 30, 2018
			Hierarchy Level
	Carrying Amount		Level 1		Level 2		Level 3
Liabilities
Acquisition-related contingent consideration, including current portion ⁽¹⁾	$	2,960	$	—	$	—	$	2,960
Current portion of long-term debt	300,000		—		306,375		—
Long-term debt	316,250		—		307,525		—
Total	$	619,210	$	—	$	613,900	$	2,960



	December 31, 2017
			Hierarchy Level
	Carrying Amount		Level 1		Level 2		Level 3
Liabilities
Acquisition-related contingent consideration, including current portion ⁽¹⁾	$	3,750	$	—	$	—	$	3,750
Long-term debt	400,000		—		409,000		—
Total	$	403,750	$	—	$	409,000	$	3,750


⁽¹⁾	The short-term portion is included in “Accounts payable, accrued expenses and other,” and the long-term portion is included in “Other liabilities” on the Condensed Consolidated Balance Sheets.

The fair values of financial instruments not included in this table are estimated to be equal to their carrying values as of September 30, 2018 and December 31, 2017.

We determine the fair value of our 6% senior notes due 2022 ("2022 Notes") primarily based on quoted market prices as of September 30, 2018 and December 31, 2017. The fair value of our borrowings on our senior secured bank revolving credit facility (“Credit Facility”) approximates the carrying amount. We estimate the fair value of our 2023 Convertible Notes based on their last actively traded prices. The fair value of our debt is classified within Level 2 of the fair value hierarchy because it is traded in less active markets.

We estimate the fair value of acquisition-related contingent consideration using a probability-weighted discounted cash flow model. This fair value estimate represents a Level 3 measurement as it is based on significant inputs not observed in the market and reflect our own assumptions. The significant unobservable inputs used in the fair value measurements of our acquisition-related contingent consideration are our measures of the future profitability and related cash flows and discount rates. The fair value of the contingent consideration is reassessed at each reporting period by the Company based on additional information as it becomes available.

Any change in the fair value of an acquisition’s contingent consideration liability results in a remeasurement gain or loss that is recorded in “Selling, general and administrative expenses” on the Condensed Consolidated Statements of Comprehensive Income. During the nine months ended September 30, 2018 there was no change in the estimated fair value of future expected contingent consideration payments. During the nine months ended September 30, 2017, we recorded a remeasurement loss of $0.7 million.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill

The table below summarizes the changes in the carrying amount of goodwill by reportable segment:



	Corporate Finance & Restructuring			Forensic and Litigation Consulting			Economic Consulting			Technology			Strategic Communications			Total
Balance at December 31, 2017
Goodwill	$	454,816		$	233,719		$	268,995		$	117,740		$	323,672		$	1,398,942
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at December 31, 2017	454,816			233,719			268,995			117,740			129,533			1,204,803
Sale of business ⁽¹⁾	—			—			—			(20,928		)	—			(20,928		)
Foreign currency translation adjustment and other	(3,060		)	(1,515		)	(276		)	(52		)	(3,043		)	(7,946		)
Balance at September 30, 2018
Goodwill	451,756			232,204			268,719			96,760			320,629			1,370,068
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at September 30, 2018	$	451,756		$	232,204		$	268,719		$	96,760		$	126,490		$	1,175,929


⁽¹⁾	During the three months ended September 30, 2018, we sold a business within our Technology segment for proceeds of $50.3 million. We wrote off $20.9 million in goodwill as a result of the sale.

Other Intangible Assets

Other intangible assets with finite lives, comprised primarily of customer relationships, are amortized over their estimated useful lives. We recorded amortization expense of $2.0 million and $6.3 million for the three and nine months ended September 30, 2018, respectively, and $2.9 million and $7.8 million for the three and nine months ended September 30, 2017, respectively.

We estimate our future amortization expense for our intangible assets with finite lives to be as follows:



Year	As of September 30, 2018⁽¹⁾
2018 (remaining)	$	1,876
2019	7,356
2020	7,240
2021	6,711
2022	4,933
Thereafter	3,513
	$	31,629


⁽¹⁾	Actual amortization expense to be reported in future periods could differ from these estimates because of new intangible asset acquisitions, changes in useful lives or other relevant factors or changes.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Long-Term Debt

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Long-Term Debt

Debt

The table below summarizes the components of the Company’s debt.



	September 30, 2018			December 31, 2017
2022 Notes	$	300,000		$	300,000
2023 Convertible Notes	316,250			—
Credit Facility	—			100,000
Total debt	616,250			400,000
Less: current portion of long-term debt, net	(296,851		)	—
Less: deferred debt discount	(46,078		)	—
Less: deferred debt issue costs	(10,004		)	(3,716		)
Long-term debt, net	$	263,317		$	396,284
Additional paid-in capital	$	35,306		$	—
Discount attribution to equity	(1,175		)	—
Equity component, net	$	34,131		$	—

2023 Convertible Notes

On August 20, 2018, we issued $316.3 million aggregate principal amount of the 2023 Convertible Notes, which includes the notes issued pursuant to an option granted to the initial purchasers of the 2023 Convertible Notes to purchase additional notes. The 2023 Convertible Notes bear interest at a fixed rate of 2.0% per year, payable semiannually in arrears on February 15th and August 15th of each year, beginning on February 15, 2019. The 2023 Convertible Notes will mature on August 15, 2023, unless earlier converted or repurchased.

The 2023 Convertible Notes are senior unsecured obligations of the Company and will rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the 2023 Convertible Notes; equal in right of payment to any of our unsecured indebtedness that is not so subordinated; effectively junior in right of payment to any of the Company’s secured indebtedness (including all amounts outstanding, from time to time, under the Credit Facility) to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries.

The 2023 Convertible Notes are convertible at an initial conversion rate of 9.8643 shares of our common stock per $1,000 principal amount of the 2023 Convertible Notes (equivalent to an initial conversion price of approximately $101.38 per share of common stock). Holders may convert their 2023 Convertible Notes at any time prior to the close of business on the business day immediately preceding May 15, 2023. The 2023 Convertible Notes may be converted only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on September 30, 2018 (and only during such calendar quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “Measurement Period”) in which the trading price (as defined in the Indenture) per $1,000 principal amount of the 2023 Convertible Notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate in effect on each such trading day; or (3) upon the occurrence of specified corporate events. On or after May 15, 2023, until the close of business on the business day immediately preceding the maturity date of August 15, 2023, holders may convert their 2023 Convertible Notes at any time, regardless of the foregoing circumstances. The circumstances required to allow the holders to convert their 2023 Convertible Notes were not met as of September 30, 2018.

If we undergo a fundamental change (as defined in the Indenture), subject to certain conditions, holders may require us to repurchase for cash all or part of their 2023 Convertible Notes.

Debt issuance costs of $8.2 million related to the 2023 Convertible Notes were comprised primarily of discounts and commissions payable to the initial purchasers. We allocated the total amount incurred to the liability and equity components of the 2023 Convertible Notes based on their relative values. Issuance costs attributable to the liability component were $7.0 million and will be amortized to interest expense using the effective interest rate method over the expected life of the 2023 Convertible Notes. Issuance costs attributable to the equity component were netted with the equity component in stockholders' equity.

The table below summarizes the amount of interest cost recognized by us for both the contractual interest expense and amortization of the debt discount and issuance costs for the 2023 Convertible Notes:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
Contractual interest expense	$	720	$	—	$	720	$	—
Amortization of debt discount and issuance costs⁽¹⁾	938		—		938		—
Total	$	1,658	$	—	$	1,658	$	—


⁽¹⁾	The effective interest rate of the liability component was 5.45% as of September 30, 2018.

2022 Notes

On October 15, 2018, we delivered a notice of redemption to the holders of our 2022 Notes for the outstanding $300.0 million aggregate principal amount of the 2022 Notes. It is our intention to redeem the notes and the notice is irrevocable and creates a legal obligation to redeem the 2022 Notes. As such, we reclassified the 2022 Notes to current in the accompanying Condensed Consolidated Balance Sheets as of September 30, 2018.

Credit Facility

We have classified the borrowings under the Credit Facility as long-term debt in the accompanying Condensed Consolidated Balance Sheets, as amounts due under the credit agreement entered into on June 26, 2015, which expires on June 26, 2020, are not contractually required or expected to be liquidated for more than one year from the applicable balance sheet date. Additionally, $1.0 million of the borrowing limit under the Credit Facility was utilized for letters of credit as of September 30, 2018.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We are subject to legal actions arising in the ordinary course of business. In management’s opinion, we believe we have adequate legal defenses and/or insurance coverage with respect to the eventuality of such actions. We do not believe any settlement or judgment relating to any pending legal action would materially affect our financial position or results of operations.

Share-Based Compensation

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

During the nine months ended September 30, 2018, we granted 248,246 restricted stock awards, 32,374 restricted stock units and 91,370 performance-based restricted stock units. These awards are recorded as equity on the Condensed Consolidated Balance Sheets. During the nine months ended September 30, 2018, stock options exercisable for up to 211,547 shares and 16,371 shares of restricted stock awards were forfeited prior to the completion of the applicable vesting requirements.

Total share-based compensation expense, net of forfeitures, for the three and nine months ended September 30, 2018 and 2017 is detailed in the following table:



	Three Months Ended September 30,				Nine Months Ended September 30,
Income Statement Classification	2018		2017		2018		2017
Direct cost of revenues	$	2,459	$	1,350	$	8,665	$	8,371
Selling, general and administrative expenses	2,939		1,781		8,286		3,833
Special charges	—		—		—		96
Total share-based compensation expense	$	5,398	$	3,131	$	16,951	$	12,300

Stockholders' Equity

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

On June 2, 2016, our Board of Directors authorized a stock repurchase program of up to $100.0 million (the “Repurchase Program”). On each of May 18, 2017 and December 1, 2017, our Board of Directors authorized an additional $100.0 million increasing the Repurchase Program to an aggregate authorization of $300.0 million. No time limit has been established for the completion of the Repurchase Program, and the Repurchase Program may be suspended, discontinued or replaced by the Board of Directors at any time without prior notice. As of September 30, 2018, we have $99.1 million available under the Repurchase Program to repurchase additional shares.

The following table details our stock repurchases under the Repurchase Program:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Shares of common stock repurchased and retired	—		1,599		337		4,366
Average price paid per share	$	—	$	32.98	$	42.17	$	35.55
Total cost	$	—	$	52,741	$	14,213	$	155,198

On August 13, 2018, our Board of Directors authorized the use of a portion of the proceeds from the issuance of the 2023 Convertible Notes to repurchase up to $25.0 million of common stock. On August 16, 2018, 196,050 shares of our common stock were repurchased at $76.51 per share for a total cost of $15.0 million. This is a separate repurchase transaction outside of the Repurchase Program.

Segment Reporting

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Reporting

We manage our business in five reportable segments: Corporate Finance & Restructuring ("Corporate Finance"), Forensic and Litigation Consulting ("FLC"), Economic Consulting, Technology and Strategic Communications.

Our Corporate Finance segment focuses on the strategic, operational, financial and capital needs of our clients around the world and delivers a wide range of service offerings related to restructuring, business transformation and transaction support. Our restructuring practice includes corporate restructuring, including bankruptcy and interim management services. Our business transformation and transaction practices include financings, mergers and acquisitions (“M&A”), M&A integration, valuations and tax advice, as well as financial, operational and performance improvement services.

Our FLC segment provides law firms, companies, government clients and other interested parties with multidisciplinary, independent dispute advisory, investigations, data analytics, forensic accounting, business intelligence and risk mitigation services, as well as interim management and performance improvement services for our health solutions practice clients.

Our Economic Consulting segment provides law firms, companies, government entities and other interested parties with analysis of complex economic issues for use in legal, regulatory and international arbitration proceedings, strategic decision making and public policy debates in the U.S. and around the world.

Our Technology segment provides corporations and law firms with a comprehensive and global portfolio of consulting and services for information governance, privacy and security, electronic discovery ("e-discovery") and insight analytics. Our consulting expertise enables clients to more confidently govern, secure, find, analyze and rapidly understand their data in the context of compliance and risk.

Our Strategic Communications segment designs and executes communications strategies for management teams and boards of directors to help them seize opportunities, manage financial, regulatory and reputational challenges, navigate market disruptions, articulate their brand, stake a competitive position and preserve and grow their operations.

We evaluate the performance of our operating segments based on Adjusted Segment EBITDA, a GAAP financial measure. We define Adjusted Segment EBITDA as a segment’s share of consolidated operating income before depreciation, amortization of intangible assets, remeasurement of acquisition-related contingent consideration, special charges and goodwill impairment charges. We define Total Adjusted Segment EBITDA, a non-GAAP financial measure, as the total of Adjusted Segment EBITDA for all segments, which excludes unallocated corporate expenses. We use Adjusted Segment EBITDA to internally evaluate the financial performance of our segments because we believe it reflects current core operating performance and provides an indicator of the segment’s ability to generate cash.

The table below presents revenues and Adjusted Segment EBITDA for our reportable segments:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Revenues
Corporate Finance & Restructuring	$	135,418	$	128,121	$	419,695	$	351,509
Forensic and Litigation Consulting	126,684		118,639		388,250		341,455
Economic Consulting	139,166		111,753		405,583		374,978
Technology	56,692		42,282		144,035		133,935
Strategic Communications	55,052		48,167		165,321		138,144
Total revenues	$	513,012	$	448,962	$	1,522,884	$	1,340,021
Adjusted Segment EBITDA
Corporate Finance & Restructuring	$	26,798	$	26,734	$	97,379	$	57,107
Forensic and Litigation Consulting	21,970		22,539		75,342		49,092
Economic Consulting	23,238		12,061		57,846		47,680
Technology	11,473		5,973		24,713		19,198
Strategic Communications	10,802		8,073		31,621		17,206
Total Adjusted Segment EBITDA	$	94,281	$	75,380	$	286,901	$	190,283

The table below reconciles net income to Total Adjusted Segment EBITDA:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Net income	$	44,333		$	32,214		$	126,887		$	41,074
Add back:
Income tax provision	19,964			9,197			49,347			17,601
Interest income and other	(1,400		)	(1,103		)	(2,074		)	(3,300		)
Gain on sale of business	(13,031		)	—			(13,031		)	—
Interest expense	7,246			6,760			20,073			18,811
Unallocated corporate expenses⁽¹⁾	27,806			18,827			77,576			60,166
Segment depreciation expense	7,388			6,603			21,826			20,602
Amortization of intangible assets	1,975			2,882			6,297			7,797
Segment special charges	—			—			—			26,830
Remeasurement of acquisition-related contingent consideration	—			—			—			702
Total Adjusted Segment EBITDA	$	94,281		$	75,380		$	286,901		$	190,283


⁽¹⁾	Includes $3.2 million in special charges for corporate for the nine months ended September 30, 2017. See Note 6, "Special Charges" in Part I, Item 1, of this Quarterly Report on Form 10-Q.

Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information

Substantially all domestic subsidiaries are guarantors of borrowings under our Credit Facility and 2022 Notes. The guarantees are full and unconditional and joint and several. Our guarantors are wholly owned, direct or indirect, subsidiaries.

The following financial information presents condensed consolidating balance sheets, statements of comprehensive income and statements of cash flows for FTI Consulting, all the guarantor subsidiaries, all the non-guarantor subsidiaries and the eliminations necessary to arrive at the consolidated information for FTI Consulting and its subsidiaries. For purposes of this presentation, we have accounted for our investments in our subsidiaries using the equity method of accounting. The principal eliminating entries eliminate investment in subsidiary and intercompany balances and transactions.

Condensed Consolidating Balance Sheet as of September 30, 2018



	FTI Consulting		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Cash and cash equivalents	$	366,539	$	153	$	139,175	$	—		$	505,867
Accounts receivable, net	199,360		198,410		225,627		—			623,397
Intercompany receivables	—		1,202,019		—		(1,202,019		)	—
Other current assets	28,787		23,660		24,802		—			77,249
Total current assets	594,686		1,424,242		389,604		(1,202,019		)	1,206,513
Property and equipment, net	40,220		17,040		25,216		—			82,476
Goodwill	549,948		416,053		209,928		—			1,175,929
Other intangible assets, net	15,803		9,677		11,249		—			36,729
Investments in subsidiaries	2,238,436		508,895		—		(2,747,331		)	—
Other assets	36,861		44,749		45,581		—			127,191
Total assets	$	3,475,954	$	2,420,656	$	681,578	$	(3,949,350	)	$	2,628,838
Liabilities
Intercompany payables	$	1,201,765	$	—	$	254	$	(1,202,019	)	$	—
Current portion of long-term debt, net	296,851		—		—		—			296,851
Other current liabilities	135,680		177,554		127,315		—			440,549
Total current liabilities	1,634,296		177,554		127,569		(1,202,019		)	737,400
Long-term debt, net	263,317		—		—		—			263,317
Other liabilities	226,866		15,032		34,748		—			276,646
Total liabilities	2,124,479		192,586		162,317		(1,202,019		)	1,277,363
Stockholders' equity	1,351,475		2,228,070		519,261		(2,747,331		)	1,351,475
Total liabilities and stockholders' equity	$	3,475,954	$	2,420,656	$	681,578	$	(3,949,350	)	$	2,628,838

Condensed Consolidating Balance Sheet as of December 31, 2017



	FTI Consulting		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Cash and cash equivalents	$	10,186	$	159	$	179,616	$	—		$	189,961
Accounts receivable, net	155,124		156,859		210,895		—			522,878
Intercompany receivables	—		1,093,211		32,695		(1,125,906		)	—
Other current assets	31,933		21,840		27,567		—			81,340
Total current assets	197,243		1,272,069		450,773		(1,125,906		)	794,179
Property and equipment, net	39,137		13,572		22,366		—			75,075
Goodwill	570,876		416,053		217,874		—			1,204,803
Other intangible assets, net	18,426		11,251		29,441		(14,968		)	44,150
Investments in subsidiaries	2,175,362		566,911		—		(2,742,273		)	—
Other assets	34,454		60,566		44,014		—			139,034
Total assets	$	3,035,498	$	2,340,422	$	764,468	$	(3,883,147	)	$	2,257,241
Liabilities
Intercompany payables	$	1,125,906	$	—	$	—	$	(1,125,906	)	$	—
Other current liabilities	127,295		144,474		138,559		—			410,328
Total current liabilities	1,253,201		144,474		138,559		(1,125,906		)	410,328
Long-term debt, net	396,284		—		—		—			396,284
Other liabilities	194,042		14,753		49,863		—			258,658
Total liabilities	1,843,527		159,227		188,422		(1,125,906		)	1,065,270
Stockholders' equity	1,191,971		2,181,195		576,046		(2,757,241		)	1,191,971
Total liabilities and stockholders' equity	$	3,035,498	$	2,340,422	$	764,468	$	(3,883,147	)	$	2,257,241

Condensed Consolidating Statement of Comprehensive Income for the Three Months Ended September 30, 2018



	FTI Consulting			Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues	$	177,547		$	169,236	$	167,855		$	(1,626	)	$	513,012
Operating expenses
Direct cost of revenues	113,645			118,795		105,639			(1,602		)	336,477
Selling, general and administrative expenses	56,586			28,949		31,937			(24		)	117,448
Amortization of other intangible assets	874			267		1,587			(753		)	1,975
	171,105			148,011		139,163			(2,379		)	455,900
Operating income	6,442			21,225		28,692			753			57,112
Other income (expense)	(26,239		)	17,522		6,287			9,615			7,185
Income before income tax provision	(19,797		)	38,747		34,979			10,368			64,297
Income tax provision (benefit)	(2,439		)	15,057		7,346			—			19,964
Equity in net earnings of subsidiaries	61,691			17,755		—			(79,446		)	—
Net income	$	44,333		$	41,445	$	27,633		$	(69,078	)	$	44,333
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	$	—		$	—	$	(4,180	)	$	—		$	(4,180	)
Other comprehensive loss, net of tax	—			—		(4,180		)	—			(4,180		)
Comprehensive income	$	44,333		$	41,445	$	23,453		$	(69,078	)	$	40,153

Condensed Consolidating Statement of Comprehensive Income for the Three Months Ended September 30, 2017



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Revenues	$	163,311		$	136,827		$	151,197	$	(2,373	)	$	448,962
Operating expenses
Direct cost of revenues	105,857			95,432			95,874		(2,312		)	294,851
Selling, general and administrative expenses	44,781			30,532			28,909		(61		)	104,161
Amortization of other intangible assets	1,304			541			1,795		(758		)	2,882
	151,942			126,505			126,578		(3,131		)	401,894
Operating income	11,369			10,322			24,619		758			47,068
Other income (expense)	(5,912		)	(4,548		)	4,803		—			(5,657		)
Income before income tax provision	5,457			5,774			29,422		758			41,411
Income tax provision	4,438			2,260			2,499		—			9,197
Equity in net earnings of subsidiaries	31,195			21,731			—		(52,926		)	—
Net income	$	32,214		$	25,245		$	26,923	$	(52,168	)	$	32,214
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of tax expense of $0	$	—		$	—		$	11,234	$	—		$	11,234
Other comprehensive income, net of tax	—			—			11,234		—			11,234
Comprehensive income	$	32,214		$	25,245		$	38,157	$	(52,168	)	$	43,448

Condensed Consolidating Statement of Comprehensive Income for the Nine Months Ended September 30, 2018



	FTI Consulting			Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues	$	550,437		$	485,653	$	492,130		$	(5,336	)	$	1,522,884
Operating expenses
Direct cost of revenues	344,856			338,858		309,570			(5,372		)	987,912
Selling, general and administrative expenses	160,739			88,423		98,311			—			347,473
Amortization of other intangible assets	2,622			994		5,014			(2,333		)	6,297
	508,217			428,275		412,895			(7,705		)	1,341,682
Operating income	42,220			57,378		79,235			2,369			181,202
Other income (expense)	(18,488		)	16,641		10,264			(13,385		)	(4,968		)
Income before income tax provision	23,732			74,019		89,499			(11,016		)	176,234
Income tax provision	4,478			26,074		18,795			—			49,347
Equity in net earnings of subsidiaries	107,633			85,322		—			(192,955		)	—
Net income	$	126,887		$	133,267	$	70,704		$	(203,971	)	$	126,887
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	$	—		$	—	$	(17,417	)	$	—		$	(17,417	)
Other comprehensive loss, net of tax	—			—		(17,417		)	—			(17,417		)
Comprehensive income	$	126,887		$	133,267	$	53,287		$	(203,971	)	$	109,470

Condensed Consolidating Statement of Comprehensive Income for the Nine Months Ended September 30, 2017



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Revenues	$	478,767		$	459,569		$	408,780	$	(7,095	)	$	1,340,021
Operating expenses
Direct cost of revenues	325,560			321,606			267,742		(6,914		)	907,994
Selling, general and administrative expenses	136,487			93,641			90,023		(181		)	319,970
Special charges	13,592			7,306			9,176		—			30,074
Amortization of other intangible assets	3,089			1,621			5,306		(2,219		)	7,797
	478,728			424,174			372,247		(9,314		)	1,265,835
Operating income	39			35,395			36,533		2,219			74,186
Other income (expense)	(16,525		)	(5,046		)	6,060		—			(15,511		)
Income (loss) before income tax provision	(16,486		)	30,349			42,593		2,219			58,675
Income tax provision (benefit)	(8,179		)	17,397			8,383		—			17,601
Equity in net earnings of subsidiaries	49,381			26,442			—		(75,823		)	—
Net income	$	41,074		$	39,394		$	34,210	$	(73,604	)	$	41,074
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of tax expense of $0	$	—		$	—		$	28,778	$	—		$	28,778
Other comprehensive income, net of tax	—			—			28,778		—			28,778
Comprehensive income	$	41,074		$	39,394		$	62,988	$	(73,604	)	$	69,852

Condensed Consolidating Statement of Cash Flows for the Nine Months Ended September 30, 2018



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
Operating activities
Net cash provided by (used in) operating activities	$	30,078		$	146,956		$	(90,762	)	$	86,272
Investing activities
Proceeds from sale of business	50,283			—			—			50,283
Purchases of property and equipment	(10,187		)	(8,311		)	(9,343		)	(27,841		)
Other	91			—			650			741
Net cash provided by (used in) investing activities	40,187			(8,311		)	(8,693		)	23,183
Financing activities
Repayments under revolving line of credit, net	(100,000		)	—			—			(100,000		)
Proceeds from issuance of convertible notes	316,250			—			—			316,250
Payments of debt issue costs	(8,048		)	—			—			(8,048		)
Deposits	—			—			2,327			2,327
Purchase and retirement of common stock	(29,220		)	—			—			(29,220		)
Net issuance of common stock under equity compensation plans	31,241			—			—			31,241
Payments for acquisition-related contingent consideration	(500		)	(2,529		)	—			(3,029		)
Intercompany transfers	76,365			(136,122		)	59,757			—
Net cash provided by (used in) financing activities	286,088			(138,651		)	62,084			209,521
Effects of exchange rate changes on cash and cash equivalents	—			—			(3,070		)	(3,070		)
Net increase (decrease) in cash and cash equivalents	356,353			(6		)	(40,441		)	315,906
Cash and cash equivalents, beginning of year	10,186			159			179,616			189,961
Cash and cash equivalents, end of year	$	366,539		$	153		$	139,175		$	505,867

Condensed Consolidating Statement of Cash Flows for the Nine Months Ended September 30, 2017



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
Operating activities
Net cash provided by (used in) operating activities	$	(6,155	)	$	40,052		$	(9,864	)	$	24,033
Investing activities
Payments for acquisition of businesses, net of cash received	(8,929		)	—			—			(8,929		)
Purchases of property and equipment	(5,943		)	(9,762		)	(4,316		)	(20,021		)
Other	74			—			—			74
Net cash used in investing activities	(14,798		)	(9,762		)	(4,316		)	(28,876		)
Financing activities
Borrowings under revolving line of credit, net	95,000			—			—			95,000
Deposits	—			—			3,585			3,585
Purchase and retirement of common stock	(155,285		)	—			—			(155,285		)
Net issuance of common stock under equity compensation plans	(2,354		)	—			—			(2,354		)
Payments for acquisition-related contingent consideration	(79		)	—			—			(79		)
Intercompany transfers	56,955			(30,287		)	(26,668		)	—
Net cash used in financing activities	(5,763		)	(30,287		)	(23,083		)	(59,133		)
Effects of exchange rate changes on cash and cash equivalents	—			—			5,779			5,779
Net increase (decrease) in cash and cash equivalents	(26,716		)	3			(31,484		)	(58,197		)
Cash and cash equivalents, beginning of year	47,420			156			168,582			216,158
Cash and cash equivalents, end of year	$	20,704		$	159		$	137,098		$	157,961

New Accounting Standards (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Changes and Error Corrections [Abstract]

Revenue Recognition

We generate the majority of our revenues by providing consulting services to our clients. Most of our consulting service contracts are based on one of the following types of arrangements:

•


•	Fixed fee arrangements require the client to pay a pre-established fee in exchange for a predetermined set of professional services. We recognize revenues for these arrangements based on the proportional performance related to individual performance obligations within each arrangement, however, these arrangements generally have one performance obligation.

•

New Accounting Standards

Adopted Accounting Standards

In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, Revenue from Contracts with Customers. On January 1, 2018, we adopted ASC 606 using the modified retrospective method and recorded an immaterial cumulative effect adjustment to the beginning balance of retained earnings for revenue contracts that existed at the adoption date. Under the modified retrospective method, prior year information has not been adjusted and continues to be reported under the accounting standards in effect for periods prior to the adoption date. We have not retroactively restated the existing contracts for modifications that occurred before January 1, 2018.

See Note 1, "Basis of Presentation and Significant Accounting Policies" in Part I, Item 1, of this Quarterly Report on Form 10-Q for a description of the significant accounting policies and methods used in preparation of the Condensed Consolidated Financial Statements. See Note 4, “Revenues” in Part I, Item 1, of this Quarterly Report on Form 10-Q for the disclosures required under ASC 606. The adoption of ASC 606 had an immaterial impact on our Condensed Consolidated Statements of Comprehensive Income and Condensed Consolidated Balance Sheets and had no impact on our Condensed Consolidated Statements of Cash Flows.

In March 2018, the FASB issued ASU 2018-05, Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (SEC Update), Income Taxes (Topic 740). ASU 2018-05 provides guidance regarding the recording of tax impacts where uncertainty exists, in the period of adoption of the 2017 U.S. Tax Cuts and Jobs Act (the “2017 Tax Act”), which allowed companies to reflect provisional amounts for those specific income tax effects of the 2017 Tax Act for which the accounting under ASC Topic 740 is incomplete but for which a reasonable estimate could be determined. During the nine months ended September 30, 2018, the Company has not recognized any material changes to the provisional amounts recorded in our 2017 Annual Report on Form 10-K in connection with the 2017 Tax Act. The accounting for the tax effects of the 2017 Tax Act will be finalized by the end of 2018 as we complete our federal and state tax returns and incorporate any additional guidance that may be issued by the U.S. tax authorities.

Accounting Standards Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, amended in some respects by subsequent ASU's (collectively “ASC 842”), which supersedes existing lease guidance. Under ASC 842, we will be required to record right-of-use assets and corresponding lease liabilities on the balance sheet, as well as to disclose key quantitative and qualitative information about leasing arrangements. This guidance is effective on a modified retrospective basis for reporting periods beginning after December 15, 2018, with early adoption permitted. We expect to adopt ASC 842 using a modified transition approach, effective January 1, 2019, under which we will recognize a cumulative-effect adjustment to retained earnings on the date of adoption. As permitted by the guidance, prior comparative periods will not be adjusted under this method. In addition, we will elect the package of practical expedients available under the guidance that allows us not to reassess whether a contract contains a lease, lease classification or initial direct costs.

The Company's implementation plan is under way and includes an information system and business process change to accumulate the appropriate data in order to calculate and record the recognition of right-of-use assets, lease liabilities and the related expense recognition. We are creating an inventory of our existing portfolio of leases and continue to review other contracts to determine if they contain leases as defined by ASC 842. Our existing portfolio of leases is primarily composed of operating leases related to our offices. While this assessment continues, we are evaluating the effect of ASC 842 on our Condensed Consolidated Balance Sheets and related disclosures. We do not currently expect that the adoption of ASC 842 will have a material impact on our results of operations or cash flow presentation.

In August 2018, the FASB issued ASU 2018-15, Internal-Use Software (Subtopic 350-40): Customer's accounting for implementation costs incurred in a cloud computing arrangement that is a service contract, which requires the Company to capitalize implementation costs of a hosting arrangement that is a service contract and expense those costs over the term of the hosting arrangement. The guidance is effective for annual and interim periods beginning after December 15, 2019 although early adoption is permitted. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.

Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Basic and Diluted



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Numerator — basic and diluted
Net income	$	44,333	$	32,214	$	126,887	$	41,074
Denominator
Weighted average number of common shares outstanding — basic	37,318		37,431		37,008		39,301
Effect of dilutive stock options	639		31		500		96
Effect of dilutive restricted shares	799		284		706		318
Weighted average number of common shares outstanding — diluted	38,756		37,746		38,214		39,715
Earnings per common share — basic	$	1.19	$	0.86	$	3.43	$	1.05
Earnings per common share — diluted	$	1.14	$	0.85	$	3.32	$	1.03
Antidilutive stock options and restricted shares	4		2,328		221		1,755

Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Carrying and Estimated Fair Value of Other Financial Instruments

The following table presents the carrying amounts and estimated fair values of our financial instruments by hierarchy level as of September 30, 2018 and December 31, 2017.



	September 30, 2018
			Hierarchy Level
	Carrying Amount		Level 1		Level 2		Level 3
Liabilities
Acquisition-related contingent consideration, including current portion ⁽¹⁾	$	2,960	$	—	$	—	$	2,960
Current portion of long-term debt	300,000		—		306,375		—
Long-term debt	316,250		—		307,525		—
Total	$	619,210	$	—	$	613,900	$	2,960



	December 31, 2017
			Hierarchy Level
	Carrying Amount		Level 1		Level 2		Level 3
Liabilities
Acquisition-related contingent consideration, including current portion ⁽¹⁾	$	3,750	$	—	$	—	$	3,750
Long-term debt	400,000		—		409,000		—
Total	$	403,750	$	—	$	409,000	$	3,750


⁽¹⁾	The short-term portion is included in “Accounts payable, accrued expenses and other,” and the long-term portion is included in “Other liabilities” on the Condensed Consolidated Balance Sheets.

Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Carrying Amounts of Goodwill by Operating Segment

The table below summarizes the changes in the carrying amount of goodwill by reportable segment:



	Corporate Finance & Restructuring			Forensic and Litigation Consulting			Economic Consulting			Technology			Strategic Communications			Total
Balance at December 31, 2017
Goodwill	$	454,816		$	233,719		$	268,995		$	117,740		$	323,672		$	1,398,942
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at December 31, 2017	454,816			233,719			268,995			117,740			129,533			1,204,803
Sale of business ⁽¹⁾	—			—			—			(20,928		)	—			(20,928		)
Foreign currency translation adjustment and other	(3,060		)	(1,515		)	(276		)	(52		)	(3,043		)	(7,946		)
Balance at September 30, 2018
Goodwill	451,756			232,204			268,719			96,760			320,629			1,370,068
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at September 30, 2018	$	451,756		$	232,204		$	268,719		$	96,760		$	126,490		$	1,175,929


⁽¹⁾	During the three months ended September 30, 2018, we sold a business within our Technology segment for proceeds of $50.3 million. We wrote off $20.9 million in goodwill as a result of the sale.

Schedule of Future Amortization Expense Intangible Assets

We estimate our future amortization expense for our intangible assets with finite lives to be as follows:



Year	As of September 30, 2018⁽¹⁾
2018 (remaining)	$	1,876
2019	7,356
2020	7,240
2021	6,711
2022	4,933
Thereafter	3,513
	$	31,629


⁽¹⁾	Actual amortization expense to be reported in future periods could differ from these estimates because of new intangible asset acquisitions, changes in useful lives or other relevant factors or changes.

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Summary of Components of Debt Obligations

The table below summarizes the components of the Company’s debt.



	September 30, 2018			December 31, 2017
2022 Notes	$	300,000		$	300,000
2023 Convertible Notes	316,250			—
Credit Facility	—			100,000
Total debt	616,250			400,000
Less: current portion of long-term debt, net	(296,851		)	—
Less: deferred debt discount	(46,078		)	—
Less: deferred debt issue costs	(10,004		)	(3,716		)
Long-term debt, net	$	263,317		$	396,284
Additional paid-in capital	$	35,306		$	—
Discount attribution to equity	(1,175		)	—
Equity component, net	$	34,131		$	—

Summary of Interest Expense



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
Contractual interest expense	$	720	$	—	$	720	$	—
Amortization of debt discount and issuance costs⁽¹⁾	938		—		938		—
Total	$	1,658	$	—	$	1,658	$	—


⁽¹⁾	The effective interest rate of the liability component was 5.45% as of September 30, 2018.

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-Based Compensation Expense

Total share-based compensation expense, net of forfeitures, for the three and nine months ended September 30, 2018 and 2017 is detailed in the following table:



	Three Months Ended September 30,				Nine Months Ended September 30,
Income Statement Classification	2018		2017		2018		2017
Direct cost of revenues	$	2,459	$	1,350	$	8,665	$	8,371
Selling, general and administrative expenses	2,939		1,781		8,286		3,833
Special charges	—		—		—		96
Total share-based compensation expense	$	5,398	$	3,131	$	16,951	$	12,300

Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Revenues and Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization for Reportable Segments

The table below presents revenues and Adjusted Segment EBITDA for our reportable segments:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Revenues
Corporate Finance & Restructuring	$	135,418	$	128,121	$	419,695	$	351,509
Forensic and Litigation Consulting	126,684		118,639		388,250		341,455
Economic Consulting	139,166		111,753		405,583		374,978
Technology	56,692		42,282		144,035		133,935
Strategic Communications	55,052		48,167		165,321		138,144
Total revenues	$	513,012	$	448,962	$	1,522,884	$	1,340,021
Adjusted Segment EBITDA
Corporate Finance & Restructuring	$	26,798	$	26,734	$	97,379	$	57,107
Forensic and Litigation Consulting	21,970		22,539		75,342		49,092
Economic Consulting	23,238		12,061		57,846		47,680
Technology	11,473		5,973		24,713		19,198
Strategic Communications	10,802		8,073		31,621		17,206
Total Adjusted Segment EBITDA	$	94,281	$	75,380	$	286,901	$	190,283

Reconciliation of Net Income to Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization

The table below reconciles net income to Total Adjusted Segment EBITDA:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Net income	$	44,333		$	32,214		$	126,887		$	41,074
Add back:
Income tax provision	19,964			9,197			49,347			17,601
Interest income and other	(1,400		)	(1,103		)	(2,074		)	(3,300		)
Gain on sale of business	(13,031		)	—			(13,031		)	—
Interest expense	7,246			6,760			20,073			18,811
Unallocated corporate expenses⁽¹⁾	27,806			18,827			77,576			60,166
Segment depreciation expense	7,388			6,603			21,826			20,602
Amortization of intangible assets	1,975			2,882			6,297			7,797
Segment special charges	—			—			—			26,830
Remeasurement of acquisition-related contingent consideration	—			—			—			702
Total Adjusted Segment EBITDA	$	94,281		$	75,380		$	286,901		$	190,283


⁽¹⁾	Includes $3.2 million in special charges for corporate for the nine months ended September 30, 2017. See Note 6, "Special Charges" in Part I, Item 1, of this Quarterly Report on Form 10-Q.

Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information (Tables)

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Condensed Consolidating Balance Sheet Information

Condensed Consolidating Balance Sheet as of September 30, 2018



	FTI Consulting		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Cash and cash equivalents	$	366,539	$	153	$	139,175	$	—		$	505,867
Accounts receivable, net	199,360		198,410		225,627		—			623,397
Intercompany receivables	—		1,202,019		—		(1,202,019		)	—
Other current assets	28,787		23,660		24,802		—			77,249
Total current assets	594,686		1,424,242		389,604		(1,202,019		)	1,206,513
Property and equipment, net	40,220		17,040		25,216		—			82,476
Goodwill	549,948		416,053		209,928		—			1,175,929
Other intangible assets, net	15,803		9,677		11,249		—			36,729
Investments in subsidiaries	2,238,436		508,895		—		(2,747,331		)	—
Other assets	36,861		44,749		45,581		—			127,191
Total assets	$	3,475,954	$	2,420,656	$	681,578	$	(3,949,350	)	$	2,628,838
Liabilities
Intercompany payables	$	1,201,765	$	—	$	254	$	(1,202,019	)	$	—
Current portion of long-term debt, net	296,851		—		—		—			296,851
Other current liabilities	135,680		177,554		127,315		—			440,549
Total current liabilities	1,634,296		177,554		127,569		(1,202,019		)	737,400
Long-term debt, net	263,317		—		—		—			263,317
Other liabilities	226,866		15,032		34,748		—			276,646
Total liabilities	2,124,479		192,586		162,317		(1,202,019		)	1,277,363
Stockholders' equity	1,351,475		2,228,070		519,261		(2,747,331		)	1,351,475
Total liabilities and stockholders' equity	$	3,475,954	$	2,420,656	$	681,578	$	(3,949,350	)	$	2,628,838

Condensed Consolidating Balance Sheet as of December 31, 2017



	FTI Consulting		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Cash and cash equivalents	$	10,186	$	159	$	179,616	$	—		$	189,961
Accounts receivable, net	155,124		156,859		210,895		—			522,878
Intercompany receivables	—		1,093,211		32,695		(1,125,906		)	—
Other current assets	31,933		21,840		27,567		—			81,340
Total current assets	197,243		1,272,069		450,773		(1,125,906		)	794,179
Property and equipment, net	39,137		13,572		22,366		—			75,075
Goodwill	570,876		416,053		217,874		—			1,204,803
Other intangible assets, net	18,426		11,251		29,441		(14,968		)	44,150
Investments in subsidiaries	2,175,362		566,911		—		(2,742,273		)	—
Other assets	34,454		60,566		44,014		—			139,034
Total assets	$	3,035,498	$	2,340,422	$	764,468	$	(3,883,147	)	$	2,257,241
Liabilities
Intercompany payables	$	1,125,906	$	—	$	—	$	(1,125,906	)	$	—
Other current liabilities	127,295		144,474		138,559		—			410,328
Total current liabilities	1,253,201		144,474		138,559		(1,125,906		)	410,328
Long-term debt, net	396,284		—		—		—			396,284
Other liabilities	194,042		14,753		49,863		—			258,658
Total liabilities	1,843,527		159,227		188,422		(1,125,906		)	1,065,270
Stockholders' equity	1,191,971		2,181,195		576,046		(2,757,241		)	1,191,971
Total liabilities and stockholders' equity	$	3,035,498	$	2,340,422	$	764,468	$	(3,883,147	)	$	2,257,241

Condensed Consolidating Statement of Comprehensive Income

Condensed Consolidating Statement of Comprehensive Income for the Three Months Ended September 30, 2018



	FTI Consulting			Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues	$	177,547		$	169,236	$	167,855		$	(1,626	)	$	513,012
Operating expenses
Direct cost of revenues	113,645			118,795		105,639			(1,602		)	336,477
Selling, general and administrative expenses	56,586			28,949		31,937			(24		)	117,448
Amortization of other intangible assets	874			267		1,587			(753		)	1,975
	171,105			148,011		139,163			(2,379		)	455,900
Operating income	6,442			21,225		28,692			753			57,112
Other income (expense)	(26,239		)	17,522		6,287			9,615			7,185
Income before income tax provision	(19,797		)	38,747		34,979			10,368			64,297
Income tax provision (benefit)	(2,439		)	15,057		7,346			—			19,964
Equity in net earnings of subsidiaries	61,691			17,755		—			(79,446		)	—
Net income	$	44,333		$	41,445	$	27,633		$	(69,078	)	$	44,333
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	$	—		$	—	$	(4,180	)	$	—		$	(4,180	)
Other comprehensive loss, net of tax	—			—		(4,180		)	—			(4,180		)
Comprehensive income	$	44,333		$	41,445	$	23,453		$	(69,078	)	$	40,153

Condensed Consolidating Statement of Comprehensive Income for the Three Months Ended September 30, 2017



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Revenues	$	163,311		$	136,827		$	151,197	$	(2,373	)	$	448,962
Operating expenses
Direct cost of revenues	105,857			95,432			95,874		(2,312		)	294,851
Selling, general and administrative expenses	44,781			30,532			28,909		(61		)	104,161
Amortization of other intangible assets	1,304			541			1,795		(758		)	2,882
	151,942			126,505			126,578		(3,131		)	401,894
Operating income	11,369			10,322			24,619		758			47,068
Other income (expense)	(5,912		)	(4,548		)	4,803		—			(5,657		)
Income before income tax provision	5,457			5,774			29,422		758			41,411
Income tax provision	4,438			2,260			2,499		—			9,197
Equity in net earnings of subsidiaries	31,195			21,731			—		(52,926		)	—
Net income	$	32,214		$	25,245		$	26,923	$	(52,168	)	$	32,214
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of tax expense of $0	$	—		$	—		$	11,234	$	—		$	11,234
Other comprehensive income, net of tax	—			—			11,234		—			11,234
Comprehensive income	$	32,214		$	25,245		$	38,157	$	(52,168	)	$	43,448

Condensed Consolidating Statement of Comprehensive Income for the Nine Months Ended September 30, 2018



	FTI Consulting			Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues	$	550,437		$	485,653	$	492,130		$	(5,336	)	$	1,522,884
Operating expenses
Direct cost of revenues	344,856			338,858		309,570			(5,372		)	987,912
Selling, general and administrative expenses	160,739			88,423		98,311			—			347,473
Amortization of other intangible assets	2,622			994		5,014			(2,333		)	6,297
	508,217			428,275		412,895			(7,705		)	1,341,682
Operating income	42,220			57,378		79,235			2,369			181,202
Other income (expense)	(18,488		)	16,641		10,264			(13,385		)	(4,968		)
Income before income tax provision	23,732			74,019		89,499			(11,016		)	176,234
Income tax provision	4,478			26,074		18,795			—			49,347
Equity in net earnings of subsidiaries	107,633			85,322		—			(192,955		)	—
Net income	$	126,887		$	133,267	$	70,704		$	(203,971	)	$	126,887
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	$	—		$	—	$	(17,417	)	$	—		$	(17,417	)
Other comprehensive loss, net of tax	—			—		(17,417		)	—			(17,417		)
Comprehensive income	$	126,887		$	133,267	$	53,287		$	(203,971	)	$	109,470

Condensed Consolidating Statement of Comprehensive Income for the Nine Months Ended September 30, 2017



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Revenues	$	478,767		$	459,569		$	408,780	$	(7,095	)	$	1,340,021
Operating expenses
Direct cost of revenues	325,560			321,606			267,742		(6,914		)	907,994
Selling, general and administrative expenses	136,487			93,641			90,023		(181		)	319,970
Special charges	13,592			7,306			9,176		—			30,074
Amortization of other intangible assets	3,089			1,621			5,306		(2,219		)	7,797
	478,728			424,174			372,247		(9,314		)	1,265,835
Operating income	39			35,395			36,533		2,219			74,186
Other income (expense)	(16,525		)	(5,046		)	6,060		—			(15,511		)
Income (loss) before income tax provision	(16,486		)	30,349			42,593		2,219			58,675
Income tax provision (benefit)	(8,179		)	17,397			8,383		—			17,601
Equity in net earnings of subsidiaries	49,381			26,442			—		(75,823		)	—
Net income	$	41,074		$	39,394		$	34,210	$	(73,604	)	$	41,074
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of tax expense of $0	$	—		$	—		$	28,778	$	—		$	28,778
Other comprehensive income, net of tax	—			—			28,778		—			28,778
Comprehensive income	$	41,074		$	39,394		$	62,988	$	(73,604	)	$	69,852

Condensed Consolidating Statement of Cash Flows

Condensed Consolidating Statement of Cash Flows for the Nine Months Ended September 30, 2018



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
Operating activities
Net cash provided by (used in) operating activities	$	30,078		$	146,956		$	(90,762	)	$	86,272
Investing activities
Proceeds from sale of business	50,283			—			—			50,283
Purchases of property and equipment	(10,187		)	(8,311		)	(9,343		)	(27,841		)
Other	91			—			650			741
Net cash provided by (used in) investing activities	40,187			(8,311		)	(8,693		)	23,183
Financing activities
Repayments under revolving line of credit, net	(100,000		)	—			—			(100,000		)
Proceeds from issuance of convertible notes	316,250			—			—			316,250
Payments of debt issue costs	(8,048		)	—			—			(8,048		)
Deposits	—			—			2,327			2,327
Purchase and retirement of common stock	(29,220		)	—			—			(29,220		)
Net issuance of common stock under equity compensation plans	31,241			—			—			31,241
Payments for acquisition-related contingent consideration	(500		)	(2,529		)	—			(3,029		)
Intercompany transfers	76,365			(136,122		)	59,757			—
Net cash provided by (used in) financing activities	286,088			(138,651		)	62,084			209,521
Effects of exchange rate changes on cash and cash equivalents	—			—			(3,070		)	(3,070		)
Net increase (decrease) in cash and cash equivalents	356,353			(6		)	(40,441		)	315,906
Cash and cash equivalents, beginning of year	10,186			159			179,616			189,961
Cash and cash equivalents, end of year	$	366,539		$	153		$	139,175		$	505,867

Condensed Consolidating Statement of Cash Flows for the Nine Months Ended September 30, 2017



	FTI Consulting			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
Operating activities
Net cash provided by (used in) operating activities	$	(6,155	)	$	40,052		$	(9,864	)	$	24,033
Investing activities
Payments for acquisition of businesses, net of cash received	(8,929		)	—			—			(8,929		)
Purchases of property and equipment	(5,943		)	(9,762		)	(4,316		)	(20,021		)
Other	74			—			—			74
Net cash used in investing activities	(14,798		)	(9,762		)	(4,316		)	(28,876		)
Financing activities
Borrowings under revolving line of credit, net	95,000			—			—			95,000
Deposits	—			—			3,585			3,585
Purchase and retirement of common stock	(155,285		)	—			—			(155,285		)
Net issuance of common stock under equity compensation plans	(2,354		)	—			—			(2,354		)
Payments for acquisition-related contingent consideration	(79		)	—			—			(79		)
Intercompany transfers	56,955			(30,287		)	(26,668		)	—
Net cash used in financing activities	(5,763		)	(30,287		)	(23,083		)	(59,133		)
Effects of exchange rate changes on cash and cash equivalents	—			—			5,779			5,779
Net increase (decrease) in cash and cash equivalents	(26,716		)	3			(31,484		)	(58,197		)
Cash and cash equivalents, beginning of year	47,420			156			168,582			216,158
Cash and cash equivalents, end of year	$	20,704		$	159		$	137,098		$	157,961

Basis of Presentation and Significant Accounting Policies - Additional Information (Details) - Senior Notes - Convertible Note Due 2023	Aug. 20, 2018 USD ($)
Debt Instrument [Line Items]
Interest rate (as a percent)	2.00%
Principal amount	$ 316,300,000.0

Earnings Per Common Share - Schedule of Earnings Per Share Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Common Share [Line Items]
Conversion price (in dollars per share)	$ 101.38		$ 101.38
Numerator — basic and diluted
Net income	$ 44,333	$ 32,214	$ 126,887	$ 41,074
Denominator
Weighted average number of common shares outstanding — basic (in shares)	37,318	37,431	37,008	39,301
Effect of dilutive stock options (in shares)	639	31	500	96
Effect of dilutive restricted shares (in shares)	799	284	706	318
Weighted average number of common shares outstanding — diluted (in shares)	38,756	37,746	38,214	39,715
Earnings per common share — basic (in dollars per share)	$ 1.19	$ 0.86	$ 3.43	$ 1.05
Earnings per common share — diluted (in dollars per share)	$ 1.14	$ 0.85	$ 3.32	$ 1.03
Stock Options And Restricted Shares
Denominator
Antidilutive stock options and restricted shares (in shares)	4	2,328	221	1,755

Revenues (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Revenues (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Performance obligations satisfied or partially satisfied in previous periods	$ 8.7	$ 12.9
Unfulfilled performance obligations	11.1	11.1
Contract asset	$ 2.9	$ 2.9	$ 0.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation expected duration		18 months

Accounts Receivable and Allowance for Doubtful Accounts - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance For Doubtful Accounts And Unbilled Services [Abstract]
Provision for doubtful accounts	$ 3,200	$ 4,500	$ 11,951	$ 10,510

Special Charges - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Special charges	$ 0	$ 0	$ 0	$ 30,074,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Special charges				16,100,000
Contract Termination
Restructuring Cost and Reserve [Line Items]
Special charges				12,400,000
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Special charges				$ 1,600,000

Special Charges - Schedule Of Special Charges By Segment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Special charges	$ 0	$ 0	$ 0	$ 30,074,000
Operating Segments
Restructuring Cost and Reserve [Line Items]
Special charges			0	26,830,000
Unallocated Corporate
Restructuring Cost and Reserve [Line Items]
Special charges			0	3,244,000
Corporate Finance & Restructuring \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Special charges			0	3,049,000
Forensic and Litigation Consulting \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Special charges			0	10,445,000
Economic Consulting \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Special charges			0	5,910,000
Technology \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Special charges			0	3,827,000
Strategic Communications \| Operating Segments
Restructuring Cost and Reserve [Line Items]
Special charges			$ 0	$ 3,599,000

Financial Instruments - Schedule of Carrying and Estimated Fair Value of Other Financial Instruments (Detail) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long-term debt	$ 296,851,000	$ 0
Reported Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition-related contingent consideration, including current portion	2,960,000	3,750,000
Current portion of long-term debt	300,000,000
Long-term debt	316,250,000	400,000,000
Total	619,210,000	403,750,000
Level 1 \| Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition-related contingent consideration, including current portion	0	0
Current portion of long-term debt	0
Long-term debt	0	0
Total	0	0
Level 2 \| Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition-related contingent consideration, including current portion	0	0
Current portion of long-term debt	306,375,000
Long-term debt	307,525,000	409,000,000
Total	613,900,000	409,000,000
Level 3 \| Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition-related contingent consideration, including current portion	2,960,000	3,750,000
Current portion of long-term debt	0
Long-term debt	0	0
Total	$ 2,960,000	$ 3,750,000

Financial Instruments - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Assets Sold under Agreements to Repurchase [Line Items]
Expense related to increase in fair value of future expected contingent consideration	$ 0	$ (700,000)
Senior Notes \| 6.0% senior notes due 2022
Assets Sold under Agreements to Repurchase [Line Items]
Interest rate (as a percent)	6.00%

Goodwill and Other Intangible Assets - Summary of Changes in Carrying Amounts of Goodwill by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill	$ 1,370,068	$ 1,370,068	$ 1,398,942
Accumulated goodwill impairment	(194,139)	(194,139)	(194,139)
Goodwill beginning of period		1,204,803
Sale of business (1)		(20,928)
Foreign currency translation adjustment and other		(7,946)
Goodwill end of period	1,175,929	1,175,929
Corporate Finance & Restructuring
Goodwill [Roll Forward]
Goodwill	451,756	451,756	454,816
Goodwill beginning of period		454,816
Sale of business (1)		0
Foreign currency translation adjustment and other		(3,060)
Goodwill end of period	451,756	451,756
Forensic and Litigation Consulting
Goodwill [Roll Forward]
Goodwill	232,204	232,204	233,719
Goodwill beginning of period		233,719
Sale of business (1)		0
Foreign currency translation adjustment and other		(1,515)
Goodwill end of period	232,204	232,204
Economic Consulting
Goodwill [Roll Forward]
Goodwill	268,719	268,719	268,995
Goodwill beginning of period		268,995
Sale of business (1)		0
Foreign currency translation adjustment and other		(276)
Goodwill end of period	268,719	268,719
Technology
Goodwill [Roll Forward]
Goodwill	96,760	96,760	117,740
Goodwill beginning of period		117,740
Sale of business (1)		(20,928)
Foreign currency translation adjustment and other		(52)
Goodwill end of period	96,760	96,760
Strategic Communications
Goodwill [Roll Forward]
Goodwill	320,629	320,629	323,672
Accumulated goodwill impairment	(194,139)	(194,139)	$ (194,139)
Goodwill beginning of period		129,533
Sale of business (1)		0
Foreign currency translation adjustment and other		(3,043)
Goodwill end of period	126,490	$ 126,490
Restructuring Business \| Technology
Goodwill [Roll Forward]
Sale of business (1)	$ (20,900)

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill [Line Items]
Proceeds from sale of business			$ 50,283	$ 0
Goodwill written off			20,928
Amortization of other intangible assets	$ 1,975	$ 2,882	6,297	$ 7,797
Technology
Goodwill [Line Items]
Proceeds from sale of business	$ 50,300
Goodwill written off			$ 20,928

Goodwill and Other Intangible Assets - Schedule of Future Amortization Expense (Detail) $ in Thousands	Sep. 30, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2018 (remaining)	$ 1,876
2019	7,356
2020	7,240
2021	6,711
2022	4,933
Thereafter	3,513
Amortized intangible assets, Net Carrying Amount	$ 31,629

Long-Term Debt - Summary of Components of Debt Obligations (Detail) - USD ($)	Sep. 30, 2018	Aug. 20, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 616,250,000		$ 400,000,000
Less: current portion of long-term debt, net	(296,851,000)		0
Long-term debt, net	263,317,000		396,284,000
Senior Notes \| 6.0% senior notes due 2022
Debt Instrument [Line Items]
Principal amount	300,000,000
Total debt			300,000,000
Senior Notes \| Convertible Note Due 2023
Debt Instrument [Line Items]
Principal amount		$ 316,300,000.0
Convertible Debt \| Convertible Note Due 2023
Debt Instrument [Line Items]
Total debt	316,250,000		0
Less: deferred debt discount	(46,078,000)		0
Less: deferred debt issue costs	(10,004,000)		(3,716,000)
Additional paid-in capital	35,306,000		0
Discount attribution to equity	(1,175,000)		0
Equity component, net	34,131,000		0
Line of Credit \| Credit facility
Debt Instrument [Line Items]
Total debt	$ 0		$ 100,000,000

Long-Term Debt - Additional Information (Detail)		9 Months Ended
Long-Term Debt - Additional Information (Detail)	Aug. 20, 2018 USD ($) $ / shares	Sep. 30, 2018 USD ($) $ / shares
Debt Instrument [Line Items]
Conversion price (in dollars per share) \| $ / shares		$ 101.38
Convertible Note Due 2023 \| Senior Notes
Debt Instrument [Line Items]
Principal amount	$ 316,300,000.0
Interest rate (as a percent)	2.00%
Debt conversion ratio (in shares)	9.8643
Conversion price (in dollars per share) \| $ / shares	$ 101.38
Debt issuance costs	$ 8,200,000
Convertible Notes 2023 Conversion Feature \| Senior Notes
Debt Instrument [Line Items]
Debt issuance costs	$ 7,000,000
6.0% senior notes due 2022 \| Senior Notes
Debt Instrument [Line Items]
Principal amount		$ 300,000,000
Interest rate (as a percent)		6.00%
Credit facility \| Line of Credit
Debt Instrument [Line Items]
Borrowing limit used		$ 1,000,000
Debt Instrument, Redemption, Period One \| Convertible Note Due 2023 \| Senior Notes
Debt Instrument [Line Items]
Redemption price (as a percent)		130.00%
Debt Instrument, Redemption, Period Two \| Convertible Note Due 2023 \| Senior Notes
Debt Instrument [Line Items]
Redemption price (as a percent)		98.00%

Long-Term Debt Long-Term Debt - Summary of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Debt Instrument [Line Items]
Amortization of debt discount and issuance costs(1)			$ 2,604	$ 1,489
Effective interest rate (as a percent)	5.45%		5.45%
Senior Notes \| Convertible Note Due 2023
Debt Instrument [Line Items]
Contractual interest expense	$ 720	$ 0	$ 720	0
Amortization of debt discount and issuance costs(1)	938	0	938	0
Total	$ 1,658	$ 0	$ 1,658	$ 0

Share-Based Compensation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018 shares
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options forfeited (in shares)	211,547
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based awards granted (in shares)	248,246
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based awards granted (in shares)	32,374
Restricted stock awards forfeited (in shares)	16,371
Performance-Based Restricted Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based awards granted (in shares)	91,370

Share-Based Compensation - Schedule of Share-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 5,398	$ 3,131	$ 16,951	$ 12,300
Direct cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	2,459	1,350	8,665	8,371
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	2,939	1,781	8,286	3,833
Special charges
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 0	$ 0	$ 0	$ 96

Stockholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 16, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Aug. 13, 2018	Dec. 01, 2017	May 18, 2017	Jun. 02, 2016
Stockholders Equity [Line Items]
Value of shares retired				$ 29,220,000
2016 Stock Repurchase Program
Stockholders Equity [Line Items]
Stock repurchase program authorized amount							$ 300,000,000		$ 100,000,000
Stock repurchase program additional amount authorized							$ 100,000,000.0	$ 100,000,000
Available amount under repurchase program		$ 99,100,000		$ 99,100,000
Shares of common stock repurchased and retired (in shares)		0	1,599,000	0	4,366,000
Average price paid per share (in dollars per share)		$ 0.00	$ 32.98	$ 42.17	$ 35.55
Value of shares retired		$ 0	$ 52,741,000	$ 14,213,000	$ 155,198,000
August 2023 Convertible Note Conversion Program
Stockholders Equity [Line Items]
Stock repurchase program authorized amount						$ 25,000,000.0
Shares of common stock repurchased and retired (in shares)	196,050
Average price paid per share (in dollars per share)	$ 76.51
Value of shares retired	$ 15,000,000

Stockholders' Equity - Schedule of Stock Repurchases (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stockholders Equity [Line Items]
Total cost			$ 29,220
2016 Stock Repurchase Program
Stockholders Equity [Line Items]
Shares of common stock repurchased and retired	0	1,599	0	4,366
Average price paid per share	$ 0.00	$ 32.98	$ 42.17	$ 35.55
Total cost	$ 0	$ 52,741	$ 14,213	$ 155,198

Segment Reporting - Revenues and Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization for Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 513,012	$ 448,962	$ 1,522,884	$ 1,340,021
Adjusted Segment EBITDA	94,281	75,380	286,901	190,283
Corporate Finance & Restructuring
Segment Reporting Information [Line Items]
Revenues	135,418	128,121	419,695	351,509
Adjusted Segment EBITDA	26,798	26,734	97,379	57,107
Forensic and Litigation Consulting
Segment Reporting Information [Line Items]
Revenues	126,684	118,639	388,250	341,455
Adjusted Segment EBITDA	21,970	22,539	75,342	49,092
Economic Consulting
Segment Reporting Information [Line Items]
Revenues	139,166	111,753	405,583	374,978
Adjusted Segment EBITDA	23,238	12,061	57,846	47,680
Technology
Segment Reporting Information [Line Items]
Revenues	56,692	42,282	144,035	133,935
Adjusted Segment EBITDA	11,473	5,973	24,713	19,198
Strategic Communications
Segment Reporting Information [Line Items]
Revenues	55,052	48,167	165,321	138,144
Adjusted Segment EBITDA	$ 10,802	$ 8,073	$ 31,621	$ 17,206

Segment Reporting - Reconciliation of Net Income to Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income	$ 44,333	$ 32,214	$ 126,887	$ 41,074
Add back:
Income tax provision	19,964	9,197	49,347	17,601
Interest income and other	(1,400)	(1,103)	(2,074)	(3,300)
Gain on sale of business	(13,031)	0	(13,031)	0
Interest expense	7,246	6,760	20,073	18,811
Total Adjusted Segment EBITDA	94,281	75,380	286,901	190,283
Segment Reconciling Items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income	44,333	32,214	126,887	41,074
Add back:
Income tax provision	19,964	9,197	49,347	17,601
Interest income and other	(1,400)	(1,103)	(2,074)	(3,300)
Gain on sale of business	(13,031)	0	(13,031)	0
Interest expense	7,246	6,760	20,073	18,811
Unallocated corporate expenses	27,806	18,827	77,576	60,166
Segment depreciation expense	7,388	6,603	21,826	20,602
Amortization of intangible assets	1,975	2,882	6,297	7,797
Segment special charges	0	0	0	26,830
Remeasurement of acquisition-related contingent consideration	0	0	0	702
Total Adjusted Segment EBITDA	$ 94,281	$ 75,380	$ 286,901	190,283
Unallocated Corporate \| Segment Reconciling Items
Add back:
Unallocated corporate expenses				$ 3,200

Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Condensed Consolidating Balance Sheet Information (Detail) - USD ($)	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 505,867,000	$ 189,961,000	$ 157,961,000	$ 216,158,000
Accounts receivable, net	623,397,000	522,878,000
Intercompany receivables	0	0
Other current assets	77,249,000	81,340,000
Total current assets	1,206,513,000	794,179,000
Property and equipment, net	82,476,000	75,075,000
Goodwill	1,175,929,000	1,204,803,000
Other intangible assets, net	36,729,000	44,150,000
Investments in subsidiaries	0	0
Other assets	127,191,000	139,034,000
Total assets	2,628,838,000	2,257,241,000
Liabilities
Intercompany payables	0	0
Current portion of long-term debt	296,851,000	0
Other current liabilities	440,549,000	410,328,000
Total current liabilities	737,400,000	410,328,000
Long-term debt, net	263,317,000	396,284,000
Other liabilities	276,646,000	258,658,000
Total liabilities	1,277,363,000	1,065,270,000
Stockholders' equity	1,351,475,000	1,191,971,000
Total liabilities and stockholders' equity	2,628,838,000	2,257,241,000
Eliminations
Assets
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Intercompany receivables	(1,202,019,000)	(1,125,906,000)
Other current assets	0	0
Total current assets	(1,202,019,000)	(1,125,906,000)
Property and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	(14,968,000)
Investments in subsidiaries	(2,747,331,000)	(2,742,273,000)
Other assets	0	0
Total assets	(3,949,350,000)	(3,883,147,000)
Liabilities
Intercompany payables	(1,202,019,000)	(1,125,906,000)
Current portion of long-term debt	0
Other current liabilities	0	0
Total current liabilities	(1,202,019,000)	(1,125,906,000)
Long-term debt, net	0	0
Other liabilities	0	0
Total liabilities	(1,202,019,000)	(1,125,906,000)
Stockholders' equity	(2,747,331,000)	(2,757,241,000)
Total liabilities and stockholders' equity	(3,949,350,000)	(3,883,147,000)
FTI Consulting
Assets
Cash and cash equivalents	366,539,000	10,186,000	20,704,000	47,420,000
Accounts receivable, net	199,360,000	155,124,000
Intercompany receivables	0	0
Other current assets	28,787,000	31,933,000
Total current assets	594,686,000	197,243,000
Property and equipment, net	40,220,000	39,137,000
Goodwill	549,948,000	570,876,000
Other intangible assets, net	15,803,000	18,426,000
Investments in subsidiaries	2,238,436,000	2,175,362,000
Other assets	36,861,000	34,454,000
Total assets	3,475,954,000	3,035,498,000
Liabilities
Intercompany payables	1,201,765,000	1,125,906,000
Current portion of long-term debt	296,851,000
Other current liabilities	135,680,000	127,295,000
Total current liabilities	1,634,296,000	1,253,201,000
Long-term debt, net	263,317,000	396,284,000
Other liabilities	226,866,000	194,042,000
Total liabilities	2,124,479,000	1,843,527,000
Stockholders' equity	1,351,475,000	1,191,971,000
Total liabilities and stockholders' equity	3,475,954,000	3,035,498,000
Guarantor Subsidiaries
Assets
Cash and cash equivalents	153,000	159,000	159,000	156,000
Accounts receivable, net	198,410,000	156,859,000
Intercompany receivables	1,202,019,000	1,093,211,000
Other current assets	23,660,000	21,840,000
Total current assets	1,424,242,000	1,272,069,000
Property and equipment, net	17,040,000	13,572,000
Goodwill	416,053,000	416,053,000
Other intangible assets, net	9,677,000	11,251,000
Investments in subsidiaries	508,895,000	566,911,000
Other assets	44,749,000	60,566,000
Total assets	2,420,656,000	2,340,422,000
Liabilities
Intercompany payables	0	0
Current portion of long-term debt	0
Other current liabilities	177,554,000	144,474,000
Total current liabilities	177,554,000	144,474,000
Long-term debt, net	0	0
Other liabilities	15,032,000	14,753,000
Total liabilities	192,586,000	159,227,000
Stockholders' equity	2,228,070,000	2,181,195,000
Total liabilities and stockholders' equity	2,420,656,000	2,340,422,000
Non-Guarantor Subsidiaries
Assets
Cash and cash equivalents	139,175,000	179,616,000	$ 137,098,000	$ 168,582,000
Accounts receivable, net	225,627,000	210,895,000
Intercompany receivables	0	32,695,000
Other current assets	24,802,000	27,567,000
Total current assets	389,604,000	450,773,000
Property and equipment, net	25,216,000	22,366,000
Goodwill	209,928,000	217,874,000
Other intangible assets, net	11,249,000	29,441,000
Investments in subsidiaries	0	0
Other assets	45,581,000	44,014,000
Total assets	681,578,000	764,468,000
Liabilities
Intercompany payables	254,000	0
Current portion of long-term debt	0
Other current liabilities	127,315,000	138,559,000
Total current liabilities	127,569,000	138,559,000
Long-term debt, net	0	0
Other liabilities	34,748,000	49,863,000
Total liabilities	162,317,000	188,422,000
Stockholders' equity	519,261,000	576,046,000
Total liabilities and stockholders' equity	$ 681,578,000	$ 764,468,000

Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Condensed Consolidating Statement Of Comprehensive Income (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 513,012,000	$ 448,962,000	$ 1,522,884,000	$ 1,340,021,000
Operating expenses
Direct cost of revenues	336,477,000	294,851,000	987,912,000	907,994,000
Selling, general and administrative expenses	117,448,000	104,161,000	347,473,000	319,970,000
Special charges	0	0	0	30,074,000
Acquisition-related contingent consideration			355,000	1,547,000
Amortization of other intangible assets	1,975,000	2,882,000	6,297,000	7,797,000
Operating expenses	455,900,000	401,894,000	1,341,682,000	1,265,835,000
Operating income	57,112,000	47,068,000	181,202,000	74,186,000
Other income (expense)	7,185,000	(5,657,000)	(4,968,000)	(15,511,000)
Income before income tax provision	64,297,000	41,411,000	176,234,000	58,675,000
Income tax provision	19,964,000	9,197,000	49,347,000	17,601,000
Equity in net earnings of subsidiaries	0	0	0	0
Net income	44,333,000	32,214,000	126,887,000	41,074,000
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	(4,180,000)	11,234,000	(17,417,000)	28,778,000
Total other comprehensive income (loss), net of tax	(4,180,000)	11,234,000	(17,417,000)	28,778,000
Comprehensive income	40,153,000	43,448,000	109,470,000	69,852,000
Foreign currency translation adjustments, tax expense	373,000	0	373,000	0
Eliminations
Revenues	(1,626,000)	(2,373,000)	(5,336,000)	(7,095,000)
Operating expenses
Direct cost of revenues	(1,602,000)	(2,312,000)	(5,372,000)	(6,914,000)
Selling, general and administrative expenses	(24,000)	(61,000)	0	(181,000)
Special charges				0
Amortization of other intangible assets	(753,000)	(758,000)	(2,333,000)	(2,219,000)
Operating expenses	(2,379,000)	(3,131,000)	(7,705,000)	(9,314,000)
Operating income	753,000	758,000	2,369,000	2,219,000
Other income (expense)	9,615,000	0	(13,385,000)	0
Income before income tax provision	10,368,000	758,000	(11,016,000)	2,219,000
Income tax provision	0	0	0	0
Equity in net earnings of subsidiaries	(79,446,000)	(52,926,000)	(192,955,000)	(75,823,000)
Net income	(69,078,000)	(52,168,000)	(203,971,000)	(73,604,000)
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income	(69,078,000)	(52,168,000)	(203,971,000)	(73,604,000)
FTI Consulting
Revenues	177,547,000	163,311,000	550,437,000	478,767,000
Operating expenses
Direct cost of revenues	113,645,000	105,857,000	344,856,000	325,560,000
Selling, general and administrative expenses	56,586,000	44,781,000	160,739,000	136,487,000
Special charges				13,592,000
Amortization of other intangible assets	874,000	1,304,000	2,622,000	3,089,000
Operating expenses	171,105,000	151,942,000	508,217,000	478,728,000
Operating income	6,442,000	11,369,000	42,220,000	39,000
Other income (expense)	(26,239,000)	(5,912,000)	(18,488,000)	(16,525,000)
Income before income tax provision	(19,797,000)	5,457,000	23,732,000	(16,486,000)
Income tax provision	(2,439,000)	4,438,000	4,478,000	(8,179,000)
Equity in net earnings of subsidiaries	61,691,000	31,195,000	107,633,000	49,381,000
Net income	44,333,000	32,214,000	126,887,000	41,074,000
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income	44,333,000	32,214,000	126,887,000	41,074,000
Guarantor Subsidiaries
Revenues	169,236,000	136,827,000	485,653,000	459,569,000
Operating expenses
Direct cost of revenues	118,795,000	95,432,000	338,858,000	321,606,000
Selling, general and administrative expenses	28,949,000	30,532,000	88,423,000	93,641,000
Special charges				7,306,000
Amortization of other intangible assets	267,000	541,000	994,000	1,621,000
Operating expenses	148,011,000	126,505,000	428,275,000	424,174,000
Operating income	21,225,000	10,322,000	57,378,000	35,395,000
Other income (expense)	17,522,000	(4,548,000)	16,641,000	(5,046,000)
Income before income tax provision	38,747,000	5,774,000	74,019,000	30,349,000
Income tax provision	15,057,000	2,260,000	26,074,000	17,397,000
Equity in net earnings of subsidiaries	17,755,000	21,731,000	85,322,000	26,442,000
Net income	41,445,000	25,245,000	133,267,000	39,394,000
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income	41,445,000	25,245,000	133,267,000	39,394,000
Non-Guarantor Subsidiaries
Revenues	167,855,000	151,197,000	492,130,000	408,780,000
Operating expenses
Direct cost of revenues	105,639,000	95,874,000	309,570,000	267,742,000
Selling, general and administrative expenses	31,937,000	28,909,000	98,311,000	90,023,000
Special charges				9,176,000
Amortization of other intangible assets	1,587,000	1,795,000	5,014,000	5,306,000
Operating expenses	139,163,000	126,578,000	412,895,000	372,247,000
Operating income	28,692,000	24,619,000	79,235,000	36,533,000
Other income (expense)	6,287,000	4,803,000	10,264,000	6,060,000
Income before income tax provision	34,979,000	29,422,000	89,499,000	42,593,000
Income tax provision	7,346,000	2,499,000	18,795,000	8,383,000
Equity in net earnings of subsidiaries	0	0	0	0
Net income	27,633,000	26,923,000	70,704,000	34,210,000
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax expense of $373	(4,180,000)	11,234,000	(17,417,000)	28,778,000
Total other comprehensive income (loss), net of tax	(4,180,000)	11,234,000	(17,417,000)	28,778,000
Comprehensive income	$ 23,453,000	$ 38,157,000	$ 53,287,000	$ 62,988,000

Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Condensed Consolidating Statement Of Cash Flows (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities
Net cash provided by (used in) operating activities	$ 86,272	$ 24,033
Investing activities
Proceeds from sale of business	50,283	0
Payments for acquisition of businesses, net of cash received	0	(8,929)
Purchases of property and equipment	(27,841)	(20,021)
Other	741	74
Net cash used in investing activities	23,183	(28,876)
Financing activities
Repayments under revolving line of credit, net	(100,000)	95,000
Proceeds from issuance of convertible notes	316,250	0
Payments of Debt Issuance Costs	(8,048)	0
Deposits	2,327	3,585
Purchase and retirement of common stock	(29,220)	(155,285)
Net issuance of common stock under equity compensation plans	31,241	(2,354)
Payments for acquisition-related contingent consideration	(3,029)	(79)
Intercompany transfers	0	0
Net cash provided by (used in) financing activities	209,521	(59,133)
Effect of exchange rate changes on cash and cash equivalents	(3,070)	5,779
Net increase (decrease) in cash and cash equivalents	315,906	(58,197)
Cash and cash equivalents, beginning of period	189,961	216,158
Cash and cash equivalents, end of period	505,867	157,961
FTI Consulting
Operating activities
Net cash provided by (used in) operating activities	30,078	(6,155)
Investing activities
Proceeds from sale of business	50,283
Payments for acquisition of businesses, net of cash received		(8,929)
Purchases of property and equipment	(10,187)	(5,943)
Other	91	74
Net cash used in investing activities	40,187	(14,798)
Financing activities
Repayments under revolving line of credit, net	(100,000)	95,000
Proceeds from issuance of convertible notes	316,250
Payments of Debt Issuance Costs	(8,048)
Deposits	0	0
Purchase and retirement of common stock	(29,220)	(155,285)
Net issuance of common stock under equity compensation plans	31,241	(2,354)
Payments for acquisition-related contingent consideration	(500)	(79)
Intercompany transfers	76,365	56,955
Net cash provided by (used in) financing activities	286,088	(5,763)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	356,353	(26,716)
Cash and cash equivalents, beginning of period	10,186	47,420
Cash and cash equivalents, end of period	366,539	20,704
Guarantor Subsidiaries
Operating activities
Net cash provided by (used in) operating activities	146,956	40,052
Investing activities
Proceeds from sale of business	0
Payments for acquisition of businesses, net of cash received		0
Purchases of property and equipment	(8,311)	(9,762)
Other	0	0
Net cash used in investing activities	(8,311)	(9,762)
Financing activities
Repayments under revolving line of credit, net	0	0
Proceeds from issuance of convertible notes	0
Payments of Debt Issuance Costs	0
Deposits	0	0
Purchase and retirement of common stock	0	0
Net issuance of common stock under equity compensation plans	0	0
Payments for acquisition-related contingent consideration	(2,529)	0
Intercompany transfers	(136,122)	(30,287)
Net cash provided by (used in) financing activities	(138,651)	(30,287)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	(6)	3
Cash and cash equivalents, beginning of period	159	156
Cash and cash equivalents, end of period	153	159
Non-Guarantor Subsidiaries
Operating activities
Net cash provided by (used in) operating activities	(90,762)	(9,864)
Investing activities
Proceeds from sale of business	0
Payments for acquisition of businesses, net of cash received		0
Purchases of property and equipment	(9,343)	(4,316)
Other	650	0
Net cash used in investing activities	(8,693)	(4,316)
Financing activities
Repayments under revolving line of credit, net	0	0
Proceeds from issuance of convertible notes	0
Payments of Debt Issuance Costs	0
Deposits	2,327	3,585
Purchase and retirement of common stock	0	0
Net issuance of common stock under equity compensation plans	0	0
Payments for acquisition-related contingent consideration	0	0
Intercompany transfers	59,757	(26,668)
Net cash provided by (used in) financing activities	62,084	(23,083)
Effect of exchange rate changes on cash and cash equivalents	(3,070)	5,779
Net increase (decrease) in cash and cash equivalents	(40,441)	(31,484)
Cash and cash equivalents, beginning of period	179,616	168,582
Cash and cash equivalents, end of period	$ 139,175	$ 137,098

Segment Reporting - Additional Information (Detail)	9 Months Ended
Segment Reporting - Additional Information (Detail)	Sep. 30, 2018 segment
Segment Reporting [Abstract]
Number of reportable segments	5