Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest income:
Interest and fees on loans	$ 8,777	$ 8,958	$ 17,644	$ 17,991
Interest on tax-exempt securities	585	478	1,165	1,010
Interest on U.S. government securities	408	633	799	1,311
Interest on other securities	794	577	1,526	1,228
Total interest income	10,564	10,646	21,134	21,540
Interest expense:
Interest on demand deposits	153	204	310	430
Interest on savings deposits	105	229	221	475
Interest on certificates of deposit	1,005	1,272	2,070	2,585
Interest on securities sold under repurchase agreements	7	13	13	27
Interest on Federal Home Loan Bank borrowings	(47)	148	103	312
Interest on other borrowings	630	263	1,241	529
Total interest expense	1,853	2,129	3,958	4,358
Net interest income	8,711	8,517	17,176	17,182
Provision for loan losses	1,650	2,580	2,950	4,980
Net interest income after provision for loan and lease losses	7,061	5,937	14,226	12,202
Noninterest income:
Service charges on deposit accounts	50	52	97	102
Payroll and benefit processing fees	118	102	273	230
Earnings on cash surrender value - Bank owned life insurance	114	119	227	230
Gain on investment securities, net	542	655	1,187	913
Merchant credit card service income, net	38	33	73	303
Mortgage banking revenue, net	6,144	2,550	11,076	5,083
Other income	146	114	271	216
Total noninterest income	7,152	3,625	13,204	7,077
Noninterest expense:
Salaries and related benefits	6,478	4,017	12,460	8,231
Occupancy and equipment expense	825	800	1,687	1,528
Write down of other real estate owned	425	370	425	557
Federal Deposit Insurance Corporation insurance premium	198	363	410	735
Data processing fees	115	91	185	190
Professional service fees	639	595	1,302	1,169
Deferred compensation expense	146	131	290	258
Other expenses	1,835	1,487	3,781	2,832
Total noninterest expense	10,661	7,854	20,540	15,500
Income before provision for income taxes	3,552	1,708	6,890	3,779
Provision for income taxes	1,128	216	2,230	647
Net Income	2,424	1,492	4,660	3,132
Less: Net income (loss) attributable to noncontrolling interest	172	6	348	(18)
Net income attributable to Bank of Commerce Holdings	2,252	1,486	4,312	3,150
Less: Preferred dividend and accretion on preferred stock	248	235	434	470
Income available to common shareholders	$ 2,004	$ 1,251	$ 3,878	$ 2,680
Basic earnings per share	$ 0.12	$ 0.07	$ 0.23	$ 0.16
Weighted average shares - basic	16,302	16,991	16,553	16,991
Diluted earnings per share	$ 0.12	$ 0.07	$ 0.23	$ 0.16
Weighted average shares - diluted	16,302	16,991	16,553	16,991