CONSOLIDATED INCOME STATEMENTS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
REVENUE
Commissions	$ 409,710	$ 349,248	$ 370,382
Advisory fees	483,433	415,679	425,615
Investment banking	176,447	117,665	127,529
Bank deposit sweep income	138,770	172,807	104,558
Interest	135,537	104,550	60,713
Principal transactions, net	54,684	65,347	21,031
Other	33,915	23,529	1,113
Total revenue	1,432,496	1,248,825	1,110,941
EXPENSES
Compensation and related expenses	936,814	782,396	740,827
Communications and technology	99,361	91,321	85,474
Occupancy and equipment costs	63,852	66,002	59,897
Clearing and exchange fees	27,641	24,928	25,566
Interest	87,991	68,599	23,846
Other	111,080	168,809	129,777
Total expenses	1,326,739	1,202,055	1,065,387
Pre-tax income	105,757	46,770	45,554
Income tax provision	34,510	16,498	13,444
Net income	71,247	30,272	32,110
Net income (loss) attributable to non-controlling interests, net of tax	(310)	93	(241)
Net income attributable to Oppenheimer Holdings Inc.	$ 71,557	$ 30,179	$ 32,351
Earnings per share attributable to Oppenheimer Holdings Inc.
Basic (in dollars per share)	$ 6.91	$ 2.81	$ 2.77
Diluted (in dollars per share)	$ 6.37	$ 2.59	$ 2.57
Weighted average shares outstanding
Basic (in shares)	10,349,803	10,736,166	11,666,194
Diluted (in shares)	11,230,007	11,645,708	12,607,752
Period end shares outstanding (in shares)	10,331,401	10,286,448	10,968,221