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Loan Commitments and Other Related Activities (Contractual Amounts of Financial Instruments with Off-Balance-Sheet Risk) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Commitments To Make Loans [Member] |  |
Other Contingencies And Commitments [Line Items] |  |
Fixed Rate | $ 8,169 | $ 4,307
Variable Rate | 11,569 | 309
Unused Lines Of Credit [Member] |  |
Other Contingencies And Commitments [Line Items] |  |
Fixed Rate | 47 | 47
Variable Rate | 22,993 | 18,142
Standby Letters Of Credit [Member] |  |
Other Contingencies And Commitments [Line Items] |  |
Variable Rate |  | $ 522

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- Definition Contractual Amount Of Financial Instruments With Off Balance Sheet Risk At Fixed Rate + References No definition available. + Details
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Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Contractual Amount Of Financial Instruments With Off Balance Sheet Risk At Variable Rate + References No definition available. + Details
Name: | cfbk_ContractualAmountOfFinancialInstrumentsWithOffBalanceSheetRiskAtVariableRate
Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | cfbk_OtherContingenciesAndCommitmentsLineItems
Namespace Prefix: | cfbk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration