CONDENSED CONSOLIDATED INCOME STATEMENTS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
REVENUE
Commissions	$ 83,933	$ 89,608	$ 259,174	$ 282,307
Advisory fees	107,969	102,927	310,214	326,098
Investment banking	37,411	38,393	95,354	93,516
Bank deposit sweep income	42,304	35,769	135,273	54,968
Interest	26,430	17,361	78,691	38,667
Principal transactions, net	16,892	6,502	46,635	10,124
Other	(2,272)	3,551	15,195	(8,319)
Total revenue	312,667	294,111	940,536	797,361
EXPENSES
Compensation and related expenses	195,684	179,134	589,200	543,144
Communications and technology	22,590	21,500	67,813	63,981
Occupancy and equipment costs	17,281	15,457	49,622	44,701
Clearing and exchange fees	6,051	6,705	18,241	18,923
Interest	19,744	7,018	50,353	13,158
Other	29,730	57,059	136,369	98,172
Total expenses	291,080	286,873	911,598	782,079
Pre-tax income	21,587	7,238	28,938	15,282
Income taxes provision	7,808	2,573	10,262	5,559
Net income	13,779	4,665	18,676	9,723
Net income (loss) attributable to noncontrolling interest, net of tax	(82)	145	(403)	(215)
Net income attributable to Oppenheimer Holdings Inc.	$ 13,861	$ 4,520	$ 19,079	$ 9,938
Earnings per share attributable to Oppenheimer Holdings Inc.
Basic (in dollars per share)	$ 1.32	$ 0.40	$ 1.75	$ 0.84
Diluted (in dollars per share)	$ 1.21	$ 0.37	$ 1.62	$ 0.78
Weighted average shares outstanding
Basic (in shares)	10,519,431	11,270,589	10,874,055	11,901,727
Diluted (in shares)	11,440,229	12,190,425	11,746,337	12,809,000
Period end shares outstanding (in shares)	10,388,898	10,974,655	10,388,898	10,974,655