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Loans (Individually Evaluated For Impairment By Class Of Loans) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | $ 3,241 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance |  | $ 3,329 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 3,620 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance |  | 3,764 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Impaired Financing Receivable, Unpaid Principal Balance, Total | 6,861 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance |  | 7,093 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,450 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment |  | 2,533 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 3,576 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment |  | 3,719 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Impaired Financing Receivable, Recorded Investment, Total | 6,026 us-gaap_ImpairedFinancingReceivableRecordedInvestment |  | 6,252 us-gaap_ImpairedFinancingReceivableRecordedInvestment
Impaired Financing Receivable, Allocated Loans and Leases | 54 us-gaap_ImpairedFinancingReceivableRelatedAllowance |  | 64 us-gaap_ImpairedFinancingReceivableRelatedAllowance
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 2,462 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment | 2,794 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 3,594 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment | 5,928 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment |
Impaired Financing Receivable, Average Recorded Investment, Total | 6,056 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment | 8,722 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment |
Impaired Financing Receivable, with no Related Allowance, Interest Income Recognized | 34 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod |  |
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized | 49 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod | 52 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod |
Impaired Financing Receivable, Interest Income Recognized, Total | 83 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod | 52 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod |
Impaired Financing Receivable Allocated Loans and Leases | 54 cfbk_ImpairedFinancingReceivableAllocatedAllowanceLoansAndLeases |  | 64 cfbk_ImpairedFinancingReceivableAllocatedAllowanceLoansAndLeases
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 76 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |  | 135 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 480 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |  | 509 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 68 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |  | 121 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 480 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |  | 509 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Impaired Financing Receivable, Allocated Loans and Leases | 28 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |  | 29 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 69 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 121 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 490 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 817 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |
Impaired Financing Receivable, with no Related Allowance, Interest Income Recognized | 1 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |  |
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized | 3 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 6 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember |
Single-Family Residential[Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 331 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember |  | 334 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 122 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember |  | 123 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 170 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember |  | 173 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 122 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember |  | 123 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 171 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember | 185 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 123 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember | 126 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember |
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized | 2 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember | 2 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember |
Multi-Family Residential [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 1,570 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |  | 1,579 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 51 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |  | 52 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,570 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |  | 1,579 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 51 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |  | 52 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember
Impaired Financing Receivable, Allocated Loans and Leases |  |  | 1 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 1,574 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |  |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 51 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember | 1,736 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |
Impaired Financing Receivable, with no Related Allowance, Interest Income Recognized | 23 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |  |
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized | 1 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember | 1 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |
Real Estate, Commercial, Non-Owner Occupied [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 564 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |  | 577 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 2,253 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |  | 2,352 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 463 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |  | 477 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 2,253 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |  | 2,352 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember
Impaired Financing Receivable, Allocated Loans and Leases | 9 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |  | 17 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 468 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember | 1,444 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 2,256 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember | 2,122 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized | 33 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember | 33 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember |
Real Estate, Commercial, Owner Occupied [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 700 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |  | 704 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 375 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |  | 380 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 179 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |  | 183 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 375 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |  | 380 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember
Impaired Financing Receivable, Allocated Loans and Leases | 2 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |  | 2 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 180 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember | 1,044 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 377 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember | 394 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |
Impaired Financing Receivable, with no Related Allowance, Interest Income Recognized | 10 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |  |
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized | 5 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember | 5 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialOwnerOccupiedMember |
Real Estate, Commercial, Land Acquisition [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 339 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember |  | 348 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 295 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember |  | 303 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember
Impaired Financing Receivable, Allocated Loans and Leases | 15 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember |  | 15 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 297 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember | 733 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember |
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized | $ 5 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember | $ 5 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialLandAcquisitionMember |

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- Definition Impaired Financing Receivable Allocated Allowance Loans And Leases + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Details
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Balance Type: | na
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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524 + Details
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