XML 82 R63.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 9 - Qualified Affordable Housing Project Investments (Details) - Original Investment in LIHTC Projects (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Note 9 - Qualified Affordable Housing Project Investments (Details) - Original Investment in LIHTC Projects [Line Items]      
Original Investment Value $ 7,954boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount   $ 7,954boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
Current Recorded Investment 5,349boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments   5,636boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
Unfunded Liability Obligation 1,853boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation   2,424boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation
Tax Credits and Benefits 209boch_AffordableHousingTaxCreditsAndBenefitsAmount [1]   814boch_AffordableHousingTaxCreditsAndBenefitsAmount [1]
Amortization of Investments 178boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization [2] 74boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization 903boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization [2]
Net Income Tax Benefit 31boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit   137boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
Raymond James California Housing Opportunities Fund II [Member]      
Note 9 - Qualified Affordable Housing Project Investments (Details) - Original Investment in LIHTC Projects [Line Items]      
Original Investment Value 2,000boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		   2,000boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember
Current Recorded Investment 1,692boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		   1,846boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember
Unfunded Liability Obligation 628boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		   736boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember
Tax Credits and Benefits 57boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		 [1]   160boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		 [1]
Amortization of Investments 46boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		 [2]   154boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		 [2]
Net Income Tax Benefit 11boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember		   31boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
/ us-gaap_InvestmentTypeAxis
= boch_RaymondJamesCaliforniaHousingOpportunitiesFundIIMember
WNC Institutional Tax Credit Fun 38, L.P. [Member]      
Note 9 - Qualified Affordable Housing Project Investments (Details) - Original Investment in LIHTC Projects [Line Items]      
Original Investment Value 1,000boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		   1,000boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember
Current Recorded Investment 862boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		   888boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember
Unfunded Liability Obligation 302boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		   314boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember
Tax Credits and Benefits 35boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		 [1]   105boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		 [1]
Amortization of Investments 26boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		 [2]   112boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		 [2]
Net Income Tax Benefit 9boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember		   26boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
/ us-gaap_InvestmentTypeAxis
= boch_WNCInstitutionalTaxCreditFun38LPMember
Merritt Community Capital Corporation Fund XV, L.P. [Member]      
Note 9 - Qualified Affordable Housing Project Investments (Details) - Original Investment in LIHTC Projects [Line Items]      
Original Investment Value 2,500boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		   2,500boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember
Current Recorded Investment 1,992boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		   2,050boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember
Unfunded Liability Obligation 923boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		   1,374boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsUnfundedLiabilityObligation
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember
Tax Credits and Benefits 69boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		 [1]   340boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		 [1]
Amortization of Investments 58boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		 [2]   450boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		 [2]
Net Income Tax Benefit 11boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember		   58boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
/ us-gaap_InvestmentTypeAxis
= boch_MerrittCommunityCapitalCorporationFundXVLPMember
California Affordable Housing Fund [Member]      
Note 9 - Qualified Affordable Housing Project Investments (Details) - Original Investment in LIHTC Projects [Line Items]      
Original Investment Value 2,454boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember		   2,454boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsOriginalAmount
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember
Current Recorded Investment 803boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember		   852boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestments
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember
Tax Credits and Benefits 48boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember		 [1]   209boch_AffordableHousingTaxCreditsAndBenefitsAmount
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember		 [1]
Amortization of Investments 48boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember		 [2]   187boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember		 [2]
Net Income Tax Benefit     $ 22boch_ProportionalAmortizationMethodQualifiedAffordableHousingProjectInvestmentsNetIncomeTaxBenefit
/ us-gaap_InvestmentTypeAxis
= boch_CaliforniaAffordableHousingFundMember
[1] The amounts reflected in this column represent both the tax credits, as well as the tax benefits generated by the Qualified Affordable Housing Projects operating loss.
[2] This amount reduces the tax credits and benefits generated by the Qualified Affordable Housing Projects.