CONSOLIDATED INCOME STATEMENTS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue
Commissions	$ 464,415	$ 409,710	$ 349,248
Advisory fees	555,439	483,433	415,679
Investment banking	266,392	176,447	117,665
Bank deposit sweep income	114,811	138,770	172,807
Interest	152,982	135,537	104,550
Principal transactions, net	50,214	54,684	65,347
Other	33,818	33,915	23,529
Total revenue	1,638,071	1,432,496	1,248,825
Expenses
Compensation and related expenses	1,016,506	936,814	782,396
Communications and technology	105,770	99,361	91,321
Occupancy and equipment costs	63,690	63,852	66,002
Clearing and exchange fees	27,846	27,641	24,928
Interest	86,561	87,991	68,599
Other	126,507	111,080	168,809
Total expenses	1,426,880	1,326,739	1,202,055
Pre-tax income	211,191	105,757	46,770
Income tax provision	63,232	34,510	16,498
Net income	147,959	71,247	30,272
Net income (loss) attributable to non-controlling interests, net of tax	(444)	(310)	93
Net income attributable to Oppenheimer Holdings Inc.	$ 148,403	$ 71,557	$ 30,179
Earnings per share attributable to Oppenheimer Holdings Inc.
Basic (in dollars per share)	$ 14.13	$ 6.91	$ 2.81
Diluted (in dollars per share)	$ 13.04	$ 6.37	$ 2.59
Weighted average shares outstanding
Basic (in shares)	10,502,853	10,349,803	10,736,166
Diluted (in shares)	11,383,240	11,230,007	11,645,708
Period end shares outstanding (in shares)	10,487,240	10,331,401	10,286,448
Common stock, issued (in shares)	10,487,240	10,331,401	10,286,448