Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 98,973	$ 101,180	$ 330,368
Other comprehensive income/(loss), net of tax:
Other comprehensive income/(loss), net of tax — Foreign currency translation adjustment	1,605	(1,535)	(767)
Comprehensive income	100,578	99,645	329,601
Comprehensive income/(loss) attributable to noncontrolling interests	13,482	(9,494)	51,854
Comprehensive income attributable to Piper Sandler Companies	$ 87,096	$ 109,139	$ 277,747