Fair Value (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value [Abstract]
Unpaid principal balance of impairment loan at collateral	$ 3,337	$ 3,465
Valuation allowance	$ 886	$ 985

Unpaid principal balance of impaired loans carried at fair value of collateral.

No definition available.

Name:	cfbk_UnpaidPrincipalBalanceOfImpairedLoansCarriedAtFairValueOfCollateral
Namespace Prefix:	cfbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant