Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income	$ 1,273	$ 1,802	$ 4,044	$ 5,848
Available-for-sale securities:
Unrealized gains (losses) arising during the period	528	(3,217)	5,253	(6,245)
Income tax (expense) benefit related to unrealized (gains) losses	(217)	1,324	(2,162)	2,570
Net change in unrealized gains (losses)	290	(2,090)	3,237	(4,222)
Held-to-maturity securities:
Accretion of held-to-maturity other comprehensive income to tax-exempt yield	(22)	(22)	(68)	(68)
Net change in other comprehensive income relating to held-to-maturity securities	(22)	(22)	(68)	(68)
Derivatives:
Unrealized gains (losses) arising during the period	296	(102)	(233)	1,240
Reclassification adjustments for net gains realized in earnings (net of tax expense of $9 and $62 for the three months ended September 30, 2014 and 2013 and net of tax expense of $782 and $185 for the nine months ended September 30, 2014 and 2013 respectively)	(13)	(88)	(1,118)	(265)
Income tax (expense) benefit related to unrealized gains (losses)	(122)	42	96	(510)
Net unrealized change in derivatives	161	(148)	(1,255)	465
Other comprehensive income (loss), net of tax	429	(2,260)	1,914	(3,825)
Comprehensive income (loss) – Bank of Commerce Holdings	1,702	(458)	5,958	2,023
Available for Sale Securities [Member]
Available-for-sale securities:
Reclassification adjustments for net gains (loss) realized in earnings (net of tax expense (benefit) of $11 and $139 for the three months ended September 30, 2014 and 2013, respectively, and net of tax expense (benefit) of $(106) and $384 for the nine months ended September 30, 2014 and 2013 respectively)	$ (21)	$ (197)	$ 146	$ (547)