Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Share Capital	Share Capital Class A Stock	Contributed Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Stockholders' equity attributable to Oppenheimer Holdings Inc.		$ 53,392		$ 41,776	$ 449,989	$ 165
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A non-voting common stock			$ 1,162
Repurchase of Class A non-voting common stock for cancellation			(2,035)
Net Income (Loss) Attributable to Parent	$ 11,194				11,194
Share-based expense				1,889
Vested employee share plan awards				(2,176)
Dividends paid					$ (1,432)
Currency translation adjustment	563					563
Dividends					$ 0.11
Stockholders' equity attributable to Oppenheimer Holdings Inc.	554,487	52,519		41,489	$ 459,751	728
Stockholders' equity attributable to Oppenheimer Holdings Inc.	592,722	46,557		47,406	496,998	1,761
Issuance of Class A non-voting common stock			6,183
Repurchase of Class A non-voting common stock for cancellation			$ (8,434)
Net Income (Loss) Attributable to Parent	7,818
Share-based expense				2,062
Vested employee share plan awards				(11,523)
Dividends paid					$ (1,561)
Currency translation adjustment	(537)					(537)
Dividends					$ 0.12
Stockholders' equity attributable to Oppenheimer Holdings Inc.	$ 586,730	$ 44,306		$ 37,945	$ 503,255	$ 1,224