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v2.4.1.9

Foreclosed Assets (Narrative) (Details) (Multi-Family Residential [Member]) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 property | Dec. 31, 2014 property
Multi-Family Residential [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Number of Properties | 1 cfbk_NumberOfProperties / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember | 1 cfbk_NumberOfProperties / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember
Number of Properties transferred into REO | 1 cfbk_NumberOfPropertiesTransferredIntoRealEstateOwned / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialMultiFamilyMember |

X
- Definition Number of properties. + References No definition available. + Details
Name: | cfbk_NumberOfProperties
Namespace Prefix: | cfbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Properties Transferred Into Real Estate Owned + References No definition available. + Details
Name: | cfbk_NumberOfPropertiesTransferredIntoRealEstateOwned
Namespace Prefix: | cfbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration