Segment information - Schedule of Reported Revenue and Pre-Tax Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue
Revenue	$ 373,178	$ 330,589	$ 741,003	$ 683,727
Less :
Compensation Expenses	239,074	220,727	466,165	442,442
Other Segment Items	101,894	93,997	201,252	187,965
Pre-Tax Income (Loss)	32,210	15,865	73,586	53,320
Corporate/Other
Revenue
Revenue	3,776	3,922	6,354	7,016
Less :
Compensation Expenses	26,173	23,899	46,272	48,453
Other Segment Items	4,363	6,614	8,233	16,782
Pre-Tax Income (Loss)	(26,760)	(26,591)	(48,151)	(58,219)
Wealth Management | Operating Segments
Revenue
Revenue	246,421	234,526	488,407	472,487
Less :
Compensation Expenses	132,291	123,538	251,939	239,111
Other Segment Items	51,296	46,757	105,770	93,360
Pre-Tax Income (Loss)	62,834	64,231	130,698	140,016
Capital Markets | Operating Segments
Revenue
Revenue	122,981	92,141	246,242	204,224
Less :
Compensation Expenses	80,610	73,290	167,954	154,878
Other Segment Items	46,235	40,626	87,249	77,823
Pre-Tax Income (Loss)	(3,864)	$ (21,775)	$ (8,961)	$ (28,477)
Private Client Division | Operating Segments
Revenue
Revenue	$ 246,421