CONDENSED CONSOLIDATED INCOME STATEMENTS (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
REVENUE
Commissions	$ 97,055	$ 88,544	$ 192,905	$ 175,241
Advisory fees	117,197	101,015	232,044	201,559
Investment banking	29,119	19,978	79,656	57,943
Bank deposit sweep income	34,846	44,060	71,531	92,969
Interest	34,805	27,320	61,571	52,261
Principal transactions, net	10,074	16,253	28,308	29,743
Other	7,493	9,019	17,712	18,152
Total revenue	330,589	306,189	683,727	627,868
EXPENSES
Compensation and related expenses	220,727	187,224	442,440	393,516
Communications and technology	24,682	22,783	49,258	45,223
Occupancy and equipment costs	15,516	16,440	31,364	32,341
Clearing and exchange fees	6,780	5,927	12,622	12,190
Interest	21,980	17,467	42,528	30,609
Other	25,039	68,047	52,195	106,639
Total expenses	314,724	317,888	630,407	620,518
Pre-tax income (loss)	15,865	(11,699)	53,320	7,350
Income tax provision (benefit)	5,599	(2,131)	17,310	2,454
Net income (loss)	10,266	(9,568)	36,010	4,896
Net loss attributable to noncontrolling interest, net of tax	0	(168)	(310)	(321)
Net income (loss) attributable to Oppenheimer Holdings Inc.	$ 10,266	$ (9,400)	$ 36,320	$ 5,217
Earnings (loss) per share attributable to Oppenheimer Holdings Inc.
Basic (in dollars per share)	$ 0.99	$ (0.85)	$ 3.49	$ 0.47
Diluted (in dollars per share)	$ 0.92	$ (0.85)	$ 3.29	$ 0.44
Weighted average shares outstanding
Basic (in shares)	10,327,818	11,016,430	10,367,636	11,054,306
Diluted (in shares)	11,111,903	11,016,430	11,083,422	11,911,379
Period end shares outstanding (in shares)	10,327,510	10,984,240	10,327,510	10,984,240