2.4.0.806031 - Disclosure - Discontinued Operations (Details Textual)truefalsefalse1false USDfalsefalse$Jan_01_2013_Jun_30_2013http://www.sec.gov/CIK0000702513duration2013-01-01T00:00:002013-06-30T00:00:00LoanStandardhttp://bankofcommerceholdings.com/20130630Loanboch0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$BalanceAsOf_31Dec2012http://www.sec.gov/CIK0000702513instant2012-12-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalse$SixMonthsEnded_30Jun2013_Discontinued_Operations_Related_To_Ownership_Interest_In_Mortgage_Banking_Memberhttp://www.sec.gov/CIK0000702513duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseDiscontinued Operations Related to Ownership Interest in Mortgage Banking [Member]us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldiboch_DiscontinuedOperationsRelatedToOwnershipInterestInMortgageBankingMemberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0OfficeStandardhttp://bankofcommerceholdings.com/20130630Officeboch0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false truefalseBalanceAsOf_31Aug2012_Discontinued_Operations_Related_To_Ownership_Interest_In_Mortgage_Banking_Memberhttp://www.sec.gov/CIK0000702513instant2012-08-31T00:00:000001-01-01T00:00:00falsefalseDiscontinued Operations Related to Ownership Interest in Mortgage Banking [Member]us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldiboch_DiscontinuedOperationsRelatedToOwnershipInterestInMortgageBankingMemberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli01true 4boch_DiscontinuedOperationsTextualAbstractboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Discontinued Operations (Textual) [Abstract]2false 5us-gaap_MinorityInterestOwnershipPercentageByParentus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4truetruefalse0.510.51falsefalsefalsenum:percentItemTypepureThe parent entity's interest in net assets of the subsidiary, expressed as a percentage.No definition available.false0Company sold ownership Interest3false 5boch_ShareholderLiabilityPercentageOfLossOrDamageboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.490.49falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepureShareholder liability percentage of loss or damage.No definition available.false0Shareholder Liability Percentage of Loss or Damage4false 5us-gaap_NumberOfOperatingSegmentsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2121falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerNumber of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.No definition available.false256Number of operating offices5false 5boch_AggregateConsiderationReceivableUnderPurchaseAgreementboch_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse52000005200000USD$falsetruefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate consideration receivable under purchase agreement.No definition available.false2Stock Purchase Agreement price6false 5boch_CashConsiderationUnderAgreementboch_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse321000321000falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCash consideration under 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5boch_PromissoryNotePercentageConsiderationReceivableYearOneboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.350.35falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepurePromissory note percentage consideration receivable year one.No definition available.false0Promissory note payment due one year12false 5boch_PromissoryNotePercentageConsiderationReceivableYearTwoboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.250.25falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepurePromissory note percentage consideration receivable year two.No definition available.false0Promissory note payment due two year13false 5boch_PromissoryNotePercentageConsiderationReceivableYearThreeboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.200.20falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepurePromissory note percentage consideration receivable year three.No definition available.false0Promissory note payment due three year14false 5boch_PromissoryNotePercentageConsiderationReceivableYearFourboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.150.15falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepurePromissory note percentage consideration receivable year four.No definition available.false0Promissory note payment due four year15false 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5boch_ExpectedReturnOfCapitalboch_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse52000005200000falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryExpected return of capital.No definition available.false2Expected return of capital18false 5boch_MortgageWarehouseLinesOfCreditBorrowingLimitboch_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse1000000010000000falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryMortgage warehouse lines of credit borrowing limit.No definition available.false2Additional funding capacity of mortgage loans19false 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3boch_MaximumBankParticipationInterestPercentageboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truetruefalse0.800.80falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepureMaximum bank participation interest percentage.No definition available.false0Bank own maximum participation interest on risk based capital at any time24false 3boch_ParticipationInterestSaleAmountboch_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2360000023600000falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryParticipation interest sale amount.No definition available.false2Bank participation interest sold amount25false 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-Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 43 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Loss on disposal of discontinued operations27false 3boch_FutureExpectedCashFlowDiscountingPeriodboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse005 yearsfalsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaFuture expected cash flow discounting period.No definition available.false0Future expected cash flow discounting period28false 3us-gaap_FairValueInputsDiscountRateus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.100.10falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepureInterest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 false0Promissory note discount rate29false 3boch_PercentageLiabilityOfLossesAndDamagesArisingFromLoanBuybackboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.510.51falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalsenum:percentItemTypepurePercentage liability of losses and damages arising from loan buyback.No definition available.false0Percentage of losses and damages arising from loan buybackfalseDiscontinued Operations (Details Textual) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://bankofcommerceholdings.com/role/DiscontinuedOperationsDetailsTextual429