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Securities (Narrative) (Details) (Issued by U.S. Government-Sponsored Entities and Agencies [Member])	Jun. 30, 2013	Dec. 31, 2012
Issued by U.S. Government-Sponsored Entities and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Minimum percentage of securities hold	10.00%	10.00%

X

- Definition

Minimum percentage of securities hold.

+ References

No definition available.

+ Details

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

X

- Details

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