Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Preferred Amount [Member]	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comp-Income (Loss), net of tax [Member]	Subtotal Bank of Commerce Holdings [Member]	Non-controlling Interest Subsidiary [Member]
Balance at Dec. 31, 2011	$ 113,590	$ 19,931	$ 43,115	$ 45,671	$ 1,745	$ 110,462	$ 3,128
Balance, shares at Dec. 31, 2011			16,991
Net income from continuing operations	7,560			7,560		7,560
Net Income from discontinued operations	204			204		204
Less: Income from non-controlling interests of discontinued operations, net of tax	0			(348)		(348)	348
Other comprehensive income, net of tax	(487)				(487)	(487)
Comprehensive income	7,277					6,929
Disposition of non-controlling interest	(3,476)						(3,476)
Preferred stock dividend	(880)			(880)		(880)
Repurchase of common stock	(4,305)		(4,305)			(4,305)
Repurchase of common shares			(1,019)
Common cash dividend ($0.11 per share)	(1,946)			(1,946)		(1,946)
Compensation expense associated with stock options	61		61			61
Balance at Dec. 31, 2012	110,321	19,931	38,871	50,261	1,258	110,321	0
Balance, shares at Dec. 31, 2012			15,972
Net income from continuing operations	5,848			5,848		5,848
Net Income from discontinued operations	0
Less: Income from non-controlling interests of discontinued operations, net of tax	0
Other comprehensive income, net of tax	(3,825)				(3,825)	(3,825)
Comprehensive income	2,023					2,023
Preferred stock dividend	(150)			(150)		(150)
Repurchase of common stock	(7,834)		(7,834)			(7,834)
Repurchase of common shares	(1,000,000)		(1,514)
Common cash dividend ($0.11 per share)	(1,632)			(1,632)		(1,632)
Common stock issued under employee plans and related tax benefit	16		16			16
Common stock issued under employee plans and related tax benefit shares			4
Compensation expense associated with stock options	24		24			24
Balance at Sep. 30, 2013	$ 102,768	$ 19,931	$ 31,077	$ 54,327	$ (2,567)	$ 102,768	$ 0
Balance, shares at Sep. 30, 2013			14,462