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Contingent Liabilities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | Aug. 17, 2012
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Contingencies And Commitments [Line Items] |
Cost of obtaining the letter of credit | $ 9
Letters of credit outstanding, amount | $ 908

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

X
- Definition Cost of obtaining the letter of credit. + References No definition available. + Details
Name: | cfbk_CostOfObtainingLetterOfCredit
Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant