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Loans (Loans Modified As TDRs By Class Of Loans) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
loan
Dec. 31, 2013
loan
Financing Receivable, Modifications [Line Items]    
Number of Loans 1us-gaap_FinancingReceivableModificationsNumberOfContracts2 4us-gaap_FinancingReceivableModificationsNumberOfContracts2
Pre-Modification Recorded Investment $ 104us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 $ 2,469us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Post-Modification Recorded Investment 100us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 2,416us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Financing Receivable, Modifications, Recorded Investment 5,700us-gaap_FinancingReceivableModificationsRecordedInvestment 6,100us-gaap_FinancingReceivableModificationsRecordedInvestment
Commercial Portfolio Segment [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans 1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Pre-Modification Recorded Investment 104us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
126us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Post-Modification Recorded Investment 100us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
126us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
Single-Family Residential[Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans   1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialSingleFamilyMember
Pre-Modification Recorded Investment   346us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialSingleFamilyMember
Post-Modification Recorded Investment   350us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialSingleFamilyMember
Multi-Family Residential [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans   1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialMultiFamilyMember
Pre-Modification Recorded Investment   1,760us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialMultiFamilyMember
Post-Modification Recorded Investment   1,701us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateMortgageResidentialMultiFamilyMember
Real Estate, Commercial, Owner Occupied [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans   1us-gaap_FinancingReceivableModificationsNumberOfContracts2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateCommercialOwnerOccupiedMember
Pre-Modification Recorded Investment   237us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateCommercialOwnerOccupiedMember
Post-Modification Recorded Investment   $ 239us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= cfbk_RealEstateCommercialOwnerOccupiedMember