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v3.20.4

Segment Reporting - Revenues and Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization for Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 626,581 | $ 622,249 | $ 607,852 | $ 604,593 | $ 602,218 | $ 593,106 | $ 606,119 | $ 551,274 | $ 2,461,275 | $ 2,352,717 | $ 2,027,877
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 423,624 | 439,514 | 358,741
Corporate Finance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 910,184 | 723,721 | 564,479
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 216,830 | 160,735 | 121,660
FLC |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 500,275 | 577,780 | 520,333
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 33,374 | 104,435 | 96,821
Economic Consulting |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 599,088 | 592,542 | 533,979
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 91,432 | 84,112 | 69,955
Technology |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 223,016 | 215,584 | 185,755
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | 43,013 | 45,688 | 27,387
Strategic Communications |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 228,712 | 243,090 | 223,331
Adjusted Segment EBITDA |  |  |  |  |  |  |  |  | $ 38,975 | $ 44,544 | $ 42,918

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