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Regulatory Capital Matters (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014
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Regulatory Capital Matters [Abstract] |
Percent of Qualified Thrift Lender test requires | 65.00%
Opening Balance in Liquidation Account | $ 14,300

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- Definition Minimum percentage of assets to be maintained in housing-related finance and other specified areas as per qualified thrift lender test. + References No definition available. + Details
Name: | cfbk_MinimumPercentageOfAssetsToBeMaintainedInHousingRelatedFinanceAndOtherSpecifiedAreasAsPerQualifiedThriftLenderTest
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Opening balance in liquidation account. + References No definition available. + Details
Name: | cfbk_OpeningBalanceInLiquidationAccount
Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_RegulatoryCapitalRequirementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration