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Regulatory Capital Matters (Actual And Required Capital Amounts And Ratios Of CFBank) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital to risk weighted assets, Actual Amount $ 38,540us-gaap_Capital $ 37,898us-gaap_Capital
Tier 1 (Core) Capital to risk weighted assets, Actual Amount 34,933us-gaap_TierOneRiskBasedCapital 34,520us-gaap_TierOneRiskBasedCapital
Tier 1 (Core) Capital to adjusted total assets, Actual Amount 34,933us-gaap_TierOneLeverageCapital 34,520us-gaap_TierOneLeverageCapital
Common equity Tier 1 (Core) Capital to risk weighted assets, Actual Amount 34,933cfbk_CommonEquityTierOneRiskBasedCapital  
Total Capital to risk weighted assets, Actual Ratio 13.49%us-gaap_CapitalToRiskWeightedAssets 14.18%us-gaap_CapitalToRiskWeightedAssets
Tier 1 (Core) Capital to risk weighted assets, Actual Ratio 12.23%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets 12.92%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Tier 1 (Core) Capital to adjusted total assets, Actual Ratio 11.17%us-gaap_TierOneLeverageCapitalToAverageAssets 11.03%us-gaap_TierOneLeverageCapitalToAverageAssets
Common equity Tier 1 (Core) Capital to risk weighted assets, Actual Ratio 12.23%cfbk_CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets  
Total Capital to risk weighted assets, For Capital Adequacy Purposes Amount 22,857us-gaap_CapitalRequiredForCapitalAdequacy 21,379us-gaap_CapitalRequiredForCapitalAdequacy
Tier 1 (Core) Capital to risk weighted assets, For Capital Adequacy Purposes Amount 17,143us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy 10,690us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
Tier 1 (Core) Capital to adjusted total assets, For Capital Adequacy Purposes Amount 12,511us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy 12,515us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
Comment equity Tier 1 (Core) Capital to risk weighted assets, For Capital Adequacy Purposes Amount 12,857cfbk_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy  
Total Capital to risk weighted assets, For Capital Adequacy Purposes Ratio 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Tier 1 (Core) Capital to risk weighted assets, For Capital Adequacy Purposes Ratio 6.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Tier 1 (Core) Capital to adjusted total assets, For Capital Adequacy Purposes Ratio 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Common equityTier 1 (Core) Capital to risk weighted assets, For Capital Adequacy Purposes Ratio 4.50%cfbk_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets  
Capital Required to be Well Capitalized 28,572us-gaap_CapitalRequiredToBeWellCapitalized 26,724us-gaap_CapitalRequiredToBeWellCapitalized
Tier One Risk Based Capital Required to be Well Capitalized 22,857us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized 16,034us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
Tier One Leverage Capital Required to be Well Capitalized 15,639us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized 15,643us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
Common equity Tier One Risk Based Capital Required to be Well Capitalized 18,572cfbk_CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized  
Capital Required to be Well Capitalized to Risk Weighted Assets 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 8.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Common equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.50%cfbk_CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets  
CF Bank [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital Required to be Well Capitalized 34,286us-gaap_CapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= cfbk_CfBankMember		 32,069us-gaap_CapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= cfbk_CfBankMember
Tier One Leverage Capital Required to be Well Capitalized $ 25,023us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
/ 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
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