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Contingent Liabilities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 17, 2012
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