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FHLB Advances (Schedule Of Federal Home Loan Advances Pledged By Assets) (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Collateral pledged to secure advances $ 36,887,000.00us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1 $ 28,493,000.00us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
Securities [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Collateral pledged to secure advances 4,208,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember		 2,024,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
Cash [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Collateral pledged to secure advances 3,300,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_InvestmentTypeAxis
= us-gaap_CashMember		 3,300,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_InvestmentTypeAxis
= us-gaap_CashMember
Single-Family Residential[Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Collateral pledged to secure advances 19,978,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialSingleFamilyMember		 14,940,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialSingleFamilyMember
Multi-Family Residential [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Collateral pledged to secure advances 6,291,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialMultiFamilyMember		 4,890,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialMultiFamilyMember
Real Estate, Commercial [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Collateral pledged to secure advances $ 3,110,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateCommercialMember		 $ 3,339,000us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateCommercialMember