Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 2,424	$ 1,492	$ 4,660	$ 3,132
Available-for-sale securities:
Unrealized gains arising during the period	1,269	2,786	2,459	4,793
Reclassification adjustments for net gains realized in earnings, net of tax	(320)	(308)	(699)	(452)
Income tax expense related to unrealized gains	(522)	(1,142)	(1,012)	(1,968)
Net change in unrealized gains	427	1,336	748	2,373
Derivatives:
Unrealized (losses) gains arising during the period	(1,697)	0	(1,573)	659
Reclassification adjustment for gains realized in earnings, net of tax	(88)	0	(117)	0
Income tax benefit (expense) related to unrealized losses (gains)	700	0	647	(271)
Net change in unrealized (losses) gains	(1,085)	0	(1,043)	388
Other comprehensive (loss) income, net of tax	(658)	1,336	(295)	2,761
Comprehensive income	1,766	2,828	4,365	5,893
Less: Comprehensive income (loss) noncontrolling interest	172	6	348	(18)
Comprehensive income - Bank of Commerce Holdings	$ 1,594	$ 2,822	$ 4,017	$ 5,911