Segment Reporting - Schedule of Assets by Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets	$ 3,241,407	$ 3,100,909
Operating Segments
Segment Reporting Information [Line Items]
Total assets	2,460,339	2,349,079
Operating Segments | Corporate Finance
Segment Reporting Information [Line Items]
Total assets	1,028,251	927,543
Operating Segments | FLC
Segment Reporting Information [Line Items]
Total assets	475,273	445,602
Operating Segments | Economic Consulting
Segment Reporting Information [Line Items]
Total assets	540,133	554,978
Operating Segments | Technology
Segment Reporting Information [Line Items]
Total assets	211,218	206,376
Operating Segments | Strategic Communications
Segment Reporting Information [Line Items]
Total assets	205,464	214,580
Unallocated corporate assets
Segment Reporting Information [Line Items]
Total assets	$ 781,068	$ 751,830