Segments - Schedule of Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Segment Reporting [Line Items]
Revenues	$ 293,652	$ 186,714	$ 677,145	$ 468,580
Compensation and benefits	186,938	96,297	428,817	237,424
Non-compensation expenses	62,434	39,133	213,981	124,818
Total operating income	44,280	51,284	34,347	106,338
Other income (expense), net	775	1,924	(8,733)	5,533
Income before income taxes	45,055	53,208	25,614	111,871
Investment Banking Advisory
Segment Reporting [Line Items]
Revenues	239,901	141,303	527,492	349,021
Compensation and benefits	149,355	79,558	339,668	197,847
Non-compensation expenses	48,072	26,367	172,039	92,045
Total operating income	42,474	35,378	15,785	59,129
Valuations and Opinions
Segment Reporting [Line Items]
Revenues	53,751	45,411	149,653	119,559
Compensation and benefits	37,583	16,739	89,149	39,577
Non-compensation expenses	14,362	12,766	41,942	32,773
Total operating income	$ 1,806	$ 15,906	$ 18,562	$ 47,209