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Loans - Schedule Of Debtor Troubled Debt Restructuring, Subsequent Periods (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
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Financing Receivable, Modifications [Line Items] |  |
Nonaccrual Troubled Debt Restructurings, Total | $ 2,811 | $ 3,286
Commercial Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual Troubled Debt Restructurings, Total | 488 | 528
Multi-family residential [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual Troubled Debt Restructurings, Total | 2,044 | 2,082
Non-owner occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual Troubled Debt Restructurings, Total |  | 388
Owner occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual Troubled Debt Restructurings, Total | $ 279 | $ 288

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- Definition Financing Receivable Recorded Investment Nonaccrual Trouble Debt Restructured + References No definition available. + Details
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Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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