Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
REVENUE
Commissions	$ 101,243	$ 110,862	$ 314,494	$ 349,062
Advisory fees	69,557	70,957	212,766	209,592
Investment banking	16,548	33,841	72,873	94,164
Interest	14,384	12,449	37,449	37,387
Principal transactions, net	(3,339)	4,272	16,926	24,883
Other	15,143	12,298	43,517	34,448
Total revenue	213,536	244,679	698,025	749,536
EXPENSES
Compensation and related expenses	142,746	161,334	464,051	493,135
Communications and technology	16,475	15,991	50,050	50,261
Occupancy and equipment costs	16,158	15,801	47,920	47,105
Clearing and exchange fees	6,909	5,969	19,542	17,885
Interest	4,541	4,127	12,956	13,703
Other	28,234	30,561	92,552	111,306
Total expenses	215,063	233,783	687,071	733,395
Income (loss) before income tax provision (benefit)	(1,527)	10,896	10,954	16,141
Income tax provision (benefit)	(750)	6,271	4,965	9,349
Net income (loss) for the period	(777)	4,625	5,989	6,792
Less net income attributable to noncontrolling interest	131	155	883	652
Net income (loss) attributable to Oppenheimer Holdings Inc.	$ (908)	$ 4,470	$ 5,106	$ 6,140
Earnings (loss) per share attributable to Oppenheimer Holdings Inc.
Basic (in dollars per share)	$ (0.07)	$ 0.33	$ 0.37	$ 0.45
Diluted (in dollars per share)	(0.07)	0.31	0.36	0.43
Dividends declared per share (in dollars per share)	$ 0.11	$ 0.11	$ 0.33	$ 0.33
Weighted average shares
Basic (in shares)	13,690,698	13,630,368	13,713,578	13,595,458
Diluted (in shares)	13,690,698	14,297,442	14,339,205	14,217,247