CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 32,110	$ 158,964	$ 122,986
Other comprehensive income (loss), net of tax
Currency translation adjustment	(2,809)	777	1,687
Comprehensive income	29,301	159,741	124,673
Less net income (loss) attributable to noncontrolling interests	(241)	0	0
Comprehensive income attributable to Oppenheimer Holdings Inc.	$ 29,542	$ 159,741	$ 124,673