Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Preferred stock [Member]	Warrants [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, 2010	$ 103,727	$ 16,731	$ 449	$ 42,755	$ 41,722	$ (509)	$ 101,148	$ 2,579
Balance, shares at Dec. 31, 2010				16,991
Net Income from continuing operations	6,684				6,684		6,684
Net income from discontinued operations	1,120				1,120		1,120
Less: Income from noncontrolling interests of discontinued operations, net of tax	0				(549)		(549)	549
Other comprehensive income (loss), net of tax	2,254					2,254	2,254
Comprehensive income	10,058						9,509
Redemption Series A preferred stock	(17,000)	(17,000)					(17,000)
Accretion on Series A preferred stock	0	269			(269)		0
Issuance of Series B preferred stock, net	19,931	19,931					19,931
Preferred stock dividend	(998)				(998)		(998)
Common stock warrants repurchased and retired	(125)		(449)	324			(125)
Common cash dividend	(2,039)				(2,039)		(2,039)
Compensation expense associated with stock options	36			36			36
Balance at Dec. 31, 2011	113,590	19,931	0	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 noncontrolling interests of discontinued operations, net of tax	0				(348)		(348)	348
Other comprehensive income (loss), net of tax	(487)					(487)	(487)
Comprehensive income	7,277						6,929
Disposition of noncontrolling interest	(3,476)							(3,476)
Accretion on Series A preferred stock	0
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	(1,946)				(1,946)		(1,946)
Compensation expense associated with stock options	61			61			61
Balance at Dec. 31, 2012	110,321	19,931	0	38,871	50,261	1,258	110,321	0
Balance, shares at Dec. 31, 2012				15,972
Net Income from continuing operations	7,935				7,935		7,935
Net income from discontinued operations	0
Other comprehensive income (loss), net of tax	(3,650)					(3,650)	(3,650)
Comprehensive income	4,285						4,285
Accretion on Series A preferred stock	0
Preferred stock dividend	(200)				(200)		(200)
Repurchase of common stock	(10,614)			(10,614)			(10,614)
Repurchase of common shares				(2,000)
Common cash dividend	(2,052)				(2,052)		(2,052)
Restricted stock Granted
Restricted stock Granted, Shares				1
Common stock issued under employee plans and related tax benefit	17			17			17
Common stock issued under employee plans and related tax benefit shares				4
Compensation expense associated with stock options	30			30			30
Balance at Dec. 31, 2013	$ 101,787	$ 19,931	$ 0	$ 28,304	$ 55,944	$ (2,392)	$ 101,787	$ 0
Balance, shares at Dec. 31, 2013				13,977