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Regulatory Capital Matters (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
1 Months Ended
Apr. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]      
Tier One Leverage Capital Required to be Well Capitalized to Average Assets   5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Capital Required to be Well Capitalized to Risk Weighted Assets   10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Percent of Qualified Thrift Lender test requires   65.00%cfbk_MinimumPercentageOfAssetsToBeMaintainedInHousingRelatedFinanceAndOtherSpecifiedAreasAsPerQualifiedThriftLenderTest  
Opening Balance in Liquidation Account   $ 14,300cfbk_OpeningBalanceInLiquidationAccount  
Preferred Class B [Member]      
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]      
Dividends paid $ 187us-gaap_DividendsPreferredStockPaidinkind
/ us-gaap_StatementClassOfStockAxis
= us-gaap_PreferredClassBMember
   
CF Bank [Member]      
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]      
Tier One Leverage Capital Required to be Well Capitalized to Average Assets   8.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
/ dei_LegalEntityAxis
= cfbk_CfBankMember
8.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
/ dei_LegalEntityAxis
= cfbk_CfBankMember
Capital Required to be Well Capitalized to Risk Weighted Assets   12.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= cfbk_CfBankMember
12.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= cfbk_CfBankMember