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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 30,655	$ 25,744
Other comprehensive loss, net of tax
Currency translation adjustment	(487)	(388)
Comprehensive income	30,168	25,356
Less net loss attributable to noncontrolling interests	0	(310)
Comprehensive income attributable to Oppenheimer Holdings Inc.	$ 30,168	$ 25,666

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