CONSOLIDATED INCOME STATEMENTS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
REVENUE
Commissions	$ 370,382	$ 401,607	$ 395,097
Advisory fees	425,615	451,197	455,261
Investment banking	127,529	435,870	222,298
Bank deposit sweep income	104,558	15,557	34,829
Interest	60,713	36,482	33,477
Principal transactions, net	21,031	23,984	27,874
Other	1,113	29,338	29,831
Total revenue	1,110,941	1,394,035	1,198,667
EXPENSES
Compensation and related expenses	740,827	886,840	770,997
Communications and technology	85,474	80,520	82,132
Occupancy and equipment costs	59,897	60,069	62,352
Clearing and exchange fees	25,566	22,306	22,978
Interest	23,846	9,855	15,680
Other	129,777	109,804	75,528
Total expenses	1,065,387	1,169,394	1,029,667
Pre-tax income	45,554	224,641	169,000
Income taxes	13,444	65,677	46,014
Net income	32,110	158,964	122,986
Net income (loss) attributable to noncontrolling interests, net of tax	(241)	8	0
Net income attributable to Oppenheimer Holdings Inc.	$ 32,351	$ 158,964	$ 122,986
Earnings per share attributable to Oppenheimer Holdings Inc.
Basic (in dollars per share)	$ 2.77	$ 12.57	$ 9.73
Diluted (in dollars per share)	$ 2.57	$ 11.70	$ 9.30
Weighted average shares outstanding
Basic (in shares)	11,666,194	12,642,306	12,642,576
Diluted (in shares)	12,607,752	13,582,828	13,217,335
Period end shares outstanding (in shares)	10,968,221	12,546,701	12,481,443