Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Common stock dividends, per share	$ 0.03	$ 0.18
Common stock issuance, per share		$ 4.25
Common Shares
Common stock issuance, per share		$ 4.25
Retained Earnings
Common stock dividends, per share	$ 0.03	$ 0.18
Subtotal Bank of Commerce Holdings
Common stock dividends, per share	$ 0.03	$ 0.18
Common stock issuance, per share		$ 4.25