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Consolidated Statement Of Changes In Stockholders' Equity (Parenthetical) - 6 months ended Jun. 30, 2014 - Series B Preferred Stock [Member] - USD ($) $ in Thousands | Total
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Stock-based incentive plan, shares | 270,000
Offering expense | $ 392

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- Definition Preferred Stock Offering Expense + References No definition available. + Details
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Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Stock-based incentive plan, shares. + References No definition available. + Details
Name: | cfbk_StockBasedIncentivePlanShares
Namespace Prefix: | cfbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |