Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest income:
Interest and fees on loans	$ 29,464	$ 29,918	$ 33,148
Interest on taxable securities	4,203	4,198	4,195
Interest on tax-exempt securities	2,536	2,610	2,399
Interest on interest bearing due from banks	490	535	595
Total interest income	36,693	37,261	40,337
Interest expense:
Interest on demand deposits	471	485	610
Interest on savings deposits	228	254	394
Interest on certificates of deposit	2,608	2,625	3,697
Interest on other borrowings	785	114	528
Total interest expense	4,092	3,478	5,229
Net interest income	32,601	33,783	35,108
Provision for loan and lease losses	3,175	2,750	9,400
Net interest income after provision for loan and lease losses	29,426	31,033	25,708
Noninterest income:
Service charges on deposit accounts	186	191	188
Payroll and benefit processing fees	508	484	538
Earnings on cash surrender value – life insurance	628	534	470
(Loss) gain on investment securities, net	(159)	995	3,822
Merchant credit card service income, net	104	129	144
Other income	3,048	1,209	1,431
Total noninterest income	4,315	3,542	6,593
Noninterest expense:
Salaries and related benefits	14,770	12,035	11,030
Premise and equipment	2,784	2,205	2,058
Write down of other real estate owned	290		425
Federal Deposit Insurance Corporation insurance premium	798	725	820
Data processing fees	889	547	421
Professional service fees	1,527	1,241	1,078
Deferred compensation	458	179	594
Other	4,918	4,857	4,793
Total noninterest expense	26,434	21,789	21,219
Income from continuing operations before provision for income taxes	7,307	12,786	11,082
Provision for income taxes	1,580	4,851	3,522
Net income from continuing operations	5,727	7,935	7,560
Discontinued Operations:
Income from discontinued operations			535
Income tax expense associated with income from discontinued operations			331
Net income from discontinued operations			204
Less: income from discontinued operations attributable to noncontrolling interest			348
Net (loss) income from discontinued operations attributable to controlling interest			(144)
Net income attributable to Bank of Commerce Holdings	5,727	7,935	7,416
Less: Preferred dividends and accretion on preferred stock	200	200	880
Income available to common shareholders	$ 5,527	$ 7,735	$ 6,536
Basic earnings per share attributable to continuing operations (in Dollars per share)	$ 0.41	$ 0.52	$ 0.41
Basic earnings per share attributable to discontinued operations (in Dollars per share)			$ (0.01)
Average basic shares (in Shares)	13,475	14,940	16,344
Diluted earnings per share attributable to continuing operations (in Dollars per share)	$ 0.41	$ 0.52	$ 0.41
Diluted earnings per share attributable to discontinued operations (in Dollars per share)			$ (0.01)
Average diluted shares (in Shares)	13,520	14,964	16,344