Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
REVENUE
Commissions	$ 103,556	$ 116,062	$ 213,251	$ 238,200
Advisory fees	72,243	70,430	143,209	138,635
Investment banking	29,020	26,799	56,325	60,323
Interest	12,030	12,548	23,065	24,938
Principal transactions, net	1,710	11,794	20,265	20,611
Other	20,369	12,056	28,374	22,150
Total revenue	238,928	249,689	484,489	504,857
EXPENSES
Compensation and related expenses	158,214	159,851	321,305	331,801
Communications and technology	16,407	17,536	33,575	34,270
Occupancy and equipment costs	15,984	15,907	31,762	31,304
Clearing and exchange fees	6,231	6,024	12,633	11,916
Interest	4,505	4,412	8,415	9,576
Other	34,957	45,823	64,318	80,745
Total expenses	236,298	249,553	472,008	499,612
Income before income tax provision	2,630	136	12,481	5,245
Income tax provision	1,985	1,389	5,715	3,078
Net income (loss) for the period	645	(1,253)	6,766	2,167
Less net income attributable to noncontrolling interest	350	301	752	497
Net income (loss) attributable to Oppenheimer Holdings Inc.	$ 295	$ (1,554)	$ 6,014	$ 1,670
Earnings (loss) per share attributable to Oppenheimer Holdings Inc.
Basic (in dollars per share)	$ 0.02	$ (0.11)	$ 0.44	$ 0.12
Diluted (in dollars per share)	0.02	(0.11)	0.42	0.12
Dividends declared per share (in dollars per share)	$ 0.11	$ 0.11	$ 0.22	$ 0.22
Weighted average shares
Basic (in shares)	13,745,957	13,618,174	13,725,208	13,577,714
Diluted (in shares)	14,390,580	13,618,174	14,342,474	14,184,330