2.4.0.80607 - Disclosure - Other Real Estate Owned (Details Textual)truefalsefalse1false USDfalsefalse$ThreeMonthsEnded_30Jun2013http://www.sec.gov/CIK0000702513duration2013-04-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PropertyStandardhttp://bankofcommerceholdings.com/20130630Propertyboch0FamilyStandardhttp://bankofcommerceholdings.com/20130630Familyboch0USDUSD$2false USDfalsefalse$ThreeMonthsEnded_30Jun2012http://www.sec.gov/CIK0000702513duration2012-04-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$Jan_01_2013_Jun_30_2013http://www.sec.gov/CIK0000702513duration2013-01-01T00:00:002013-06-30T00:00:00PropertyStandardhttp://bankofcommerceholdings.com/20130630Propertyboch0LoanStandardhttp://bankofcommerceholdings.com/20130630Loanboch0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170FamilyStandardhttp://bankofcommerceholdings.com/20130630Familyboch0USDUSD$4false USDfalsefalse$SixMonthsEnded_30Jun2012http://www.sec.gov/CIK0000702513duration2012-01-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5false USDfalsefalse$BalanceAsOf_31Dec2012http://www.sec.gov/CIK0000702513instant2012-12-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 2boch_OtherRealEstateOwnedTextualAbstractboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Other Real Estate Owned (Textual) [Abstract]2false 3boch_OtherRealEstateOwnedPropertyByBankCostboch_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse14000001400000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse14000001400000USD$falsetruefalse4falsefalsefalse00falsefalsefalse5truefalsefalse31000003100000USD$falsetruefalsexbrli:monetaryItemTypemonetaryOther real estate owned property by bank cost.No definition available.false2Recorded investment in OREO3false 3boch_TransferOfForeclosedPropertyFromLoansToOtherRealEstateOwnedNumberOfLoansboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse77falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerTransfer of foreclosed property from loans to other real estate owned, number of loans.No definition available.false256Transfer of foreclosed property from loans to OREO, number of loans4false 3boch_TransferOfForeclosedPropertyFromLoansToOtherRealEstateOwnedboch_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse13000001300000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryTransfer of foreclosed property from loans to other real estate owned.No definition available.false2Transfer of foreclosed property from loans to OREO5false 3boch_AllowanceForLoanAndLeaseLossesRelatedToTransferredForeclosedPropertyboch_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2000020000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAllowance for loan and lease losses related to transferred foreclosed property.No definition available.false2ALLL related to transferred foreclosed property6false 3us-gaap_ImpairmentOfRealEstateus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00falsefalsefalse2truefalsefalse425000425000falsefalsefalse3truefalsefalse00falsefalsefalse4truefalsefalse425000425000falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe charge against earnings in the period to reduce the carrying amount of real property to fair value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 26 -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. false2Impairment charge on foreclosed properties7false 3boch_SoldPropertiesboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse1414falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerSold properties.No definition available.false256Sold properties8false 3us-gaap_RealEstateCostOfRealEstateSoldus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse30000003000000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe carrying amount of real estate sold during the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 28 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=6882300&loc=d3e5864-122674 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 false2Cost of properties sold9false 3us-gaap_GainLossOnSaleOfPropertyus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse1300013000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryGain (loss) recognized on the sale of oil and gas property or timber property.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Net gain from sale of property10false 3us-gaap_NumberOfRealEstatePropertiesus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse99falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse99falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerThe number of real estate properties owned as of the balance sheet date.No definition available.false256OREO balance of property11false 3boch_NumberOfRealEstatePropertiesSecuredboch_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse77falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse77falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerNumber of real estate properties secured.No definition available.false256Secured real estate properties12false 3boch_MinimumNumberOfFamilyboch_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse11falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse11falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerMinimum number of family.No definition available.false256Minimum number of family13false 3boch_MaximumNumberOfFamilyboch_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse44falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse44falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerMaximum number of family.No definition available.false256Maximum number of family14false 3boch_ResidentialRealEstateAmountboch_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse586000586000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryResidential real estate amount.No definition available.false2Residential real estate amount15false 3boch_NumberOfCommercialLandPropertiesboch_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse22falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerNumber of commercial land properties.No definition available.false256Number of commercial land properties16false 3boch_OtherRealEstateAssetsImprovedCommercialLandboch_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse750000750000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse750000750000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOther real estate assets improved commercial land.No definition available.false2Improved commercial land17false 3boch_VacantResidentialLotAmountboch_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2400024000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2400024000USD$falsetruefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryVacant residential lot amount.No definition available.false2Vacant residential lot amountfalseOther Real Estate Owned (Details Textual) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://bankofcommerceholdings.com/role/OtherRealEstateOwnedDetailsTextual517