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v3.19.3.a.u2

Segment Reporting - Revenues and Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization for Reportable Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 602,218 | $ 593,106 | $ 606,119 | $ 551,274 | $ 504,993 | $ 513,012 | $ 512,098 | $ 497,774 | $ 2,352,717 | $ 2,027,877 | $ 1,807,732
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 439,514 | 358,741 | 267,435
Corporate Finance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 723,721 | 564,479 | 482,041
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 160,735 | 121,660 | 82,863
FLC |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 577,780 | 520,333 | 462,324
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 104,435 | 96,821 | 72,705
Economic Consulting |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 592,542 | 533,979 | 496,029
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 84,112 | 69,955 | 61,964
Technology |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 215,584 | 185,755 | 174,850
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 45,688 | 27,387 | 22,171
Strategic Communications |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 243,090 | 223,331 | 192,488
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | $ 44,544 | $ 42,918 | $ 27,732

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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