Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 2,236	$ 1,640
Available-for-sale securities:
Unrealized gains arising during the period	1,190	2,007
Reclassification adjustments for net gains realized in earnings, net of tax	(379)	(144)
Income tax expense related to unrealized gains	(490)	(826)
Net change in unrealized gains	321	1,037
Derivatives:
Unrealized gains arising during the period	124	659
Reclassification adjustment for net gains realized in earnings, net of tax	(29)
Income tax expense related to unrealized gain	(53)	(271)
Net change in unrealized gains	42	388
Other comprehensive income, net of tax	363	1,425
Comprehensive income	2,599	3,065
Less: Comprehensive income noncontrolling interest	176	(24)
Comprehensive income - Bank of Commerce Holdings	$ 2,423	$ 3,089