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Segment Reporting - Schedule of Assets by Segments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Total assets | $ 3,325,878 | $ 3,241,407
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Total assets | 2,584,629 | 2,460,339
Operating Segments | Corporate Finance |  |
Segment Reporting Information [Line Items] |  |
Total assets | 1,057,999 | 1,035,410
Operating Segments | FLC |  |
Segment Reporting Information [Line Items] |  |
Total assets | 445,289 | 468,114
Operating Segments | Economic Consulting |  |
Segment Reporting Information [Line Items] |  |
Total assets | 592,985 | 540,133
Operating Segments | Technology |  |
Segment Reporting Information [Line Items] |  |
Total assets | 256,077 | 211,218
Operating Segments | Strategic Communications |  |
Segment Reporting Information [Line Items] |  |
Total assets | 232,279 | 205,464
Unallocated corporate assets |  |
Segment Reporting Information [Line Items] |  |
Total assets | $ 741,249 | $ 781,068

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