Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Preferred Amount	Noncontrolling Interest Subsidiary	Warrant	Common Stock	Retained Earnings	Accumulated Other Comp-Income (Loss), net of tax	Subtotal Bank of Commerce Holdings
Balance at Dec. 31, 2010	$ 103,727	$ 16,731	$ 2,579	$ 449	$ 42,755	$ 41,722	$ (509)	$ 101,148
Balance, shares at Dec. 31, 2010					16,991
Net Income	7,804		549			7,255		7,255
Other comprehensive income, net of tax	2,254						2,254	2,254
Comprehensive income	10,058							9,509
Redemption of Series A preferred stock	(17,000)	(17,000)						(17,000)
Accretion on Series A preferred stock		269				(269)
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 ($0.12 and 0.03 per share in 2011 and 2012 respectively)	(2,039)					(2,039)		(2,039)
Compensation expense associated with stock options	36				36			36
Balance at Dec. 31, 2011	113,590	19,931	3,128	0	43,115	45,671	1,745	110,462
Balance, shares at Dec. 31, 2011					16,991
Net Income	2,236		176			2,060		2,060
Other comprehensive income, net of tax	(363)						363	363
Comprehensive income	2,599							2,423
Preferred stock dividend	(186)					(186)		(186)
Repurchase of common stock held in treasury	(1,962)				(1,963)			(1,963)
Repurchase of common stock held in treasury, shares					(486)
Common cash dividend ($0.12 and 0.03 per share in 2011 and 2012 respectively)	(498)					(498)		(498)
Compensation expense associated with stock options	37				37			37
Balance at Mar. 31, 2012	$ 113,579	$ 19,931	$ 3,304		$ 41,189	$ 47,047	$ 2,108	$ 110,275
Balance, shares at Mar. 31, 2012					16,505