Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss		$ (4,751)	$ (3,909)
Other comprehensive income (loss), net of tax
Currency translation adjustment	[1]	1,424	873
Comprehensive loss		(3,327)	(3,036)
Net income (loss) attributable to noncontrolling interest, net of tax		96	(62)
Total comprehensive loss		$ (3,423)	$ (2,974)

[1] Total other comprehensive income is attributable to Oppenheimer Holdings Inc. No other comprehensive income is attributable to noncontrolling interests.