Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss) for the period	$ (1,253)		$ 3,066		$ 2,167	$ 6,959
Other comprehensive income (loss), net of tax
Currency translation adjustment	339		49		252	500
Comprehensive income (loss) for the period	(914)	[1]	3,115	[1]	2,419	7,459
Less net income attributable to non-controlling interests, net of tax	301		218		497	448
Comprehensive income (loss) attributable to Oppenheimer Holdings Inc.	$ (1,215)		$ 2,897		$ 1,922	$ 7,011

[1] Other comprehensive income is attributable to Oppenheimer Holdings Inc. No other comprehensive income is attributable to non-controlling interests.