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Regulatory Capital Matters (Details Textual) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
FHLB Advances and Regulatory Capital Matters [Abstract]
Tier 1 (Core) Capital to adjusted total assets as required by CF Bank Orders	8.00%	8.00%
Total Capital to risk weighted assets as required by CF Bank Orders	12.00%	12.00%
Percent of Qualified Thrift Lender test requires	65.00%
Opening Balance in Liquidation Account	$ 14,300

X

- Definition

Capital required by terms of CF bank order to risk weighted assets.

+ References

No definition available.

+ Details

Name:	cfbk_CapitalRequiredByTermsOfCfBankOrderToRiskWeightedAssets
Namespace Prefix:	cfbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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

X

- Definition

Tier one leverage capital required by terms of CF bank order to average assets.

+ References

No definition available.

+ Details

Name:	cfbk_TierOneLeverageCapitalRequiredByTermsOfCfBankOrderToAverageAssets
Namespace Prefix:	cfbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_BankingAndThriftAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration