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Other Borrowings (Assets Pledged As Collateral With FRB) (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assets pledged as collateral with the FRB $ 56,586,000.00us-gaap_LoansPledgedAsCollateral $ 48,312,000.00us-gaap_LoansPledgedAsCollateral
Commercial Portfolio Segment [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assets pledged as collateral with the FRB 18,111,000us-gaap_LoansPledgedAsCollateral
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 19,591,000us-gaap_LoansPledgedAsCollateral
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Real Estate, Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Assets pledged as collateral with the FRB $ 38,475,000us-gaap_LoansPledgedAsCollateral
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateCommercialMember		 $ 28,721,000us-gaap_LoansPledgedAsCollateral
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateCommercialMember