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Loan Commitments and Other Related Activities - Contractual Amounts of Financial Instruments with Off-Balance-Sheet Risk (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Commitments to make loans [Member] |  |
Other Contingencies And Commitments [Line Items] |  |
Fixed Rate | $ 4,307 | $ 943
Variable Rate | 309 | 741
Unused lines of credit [Member] |  |
Other Contingencies And Commitments [Line Items] |  |
Fixed Rate | 47 | 62
Variable Rate | 18,142 | 19,952
Standby letters of credit [Member] |  |
Other Contingencies And Commitments [Line Items] |  |
Fixed Rate |  |
Variable Rate | $ 522 | $ 526

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- Definition Contractual Amount Of Financial Instruments With Off Balance Sheet Risk At Fixed Rate + References No definition available. + Details
Name: | cfbk_ContractualAmountOfFinancialInstrumentsWithOffBalanceSheetRiskAtFixedRate
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