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Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015
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Summary of Significant Accounting Policies [Abstract] |
Balances of loans of all other classes while impairment evaluation | $ 250 cfbk_MinimumOutstandingImpairedCommercialLoans

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- Definition Minimum Outstanding Impaired Commercial Loans + References No definition available. + Details
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Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration