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Derivative Instruments (Schedule Of Notional Amount Of Loans Sold) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Derivative Instruments [Abstract] |  |  |  |
Notional amount of loans sold | $ 12,053 | $ 3,646 | $ 31,926 | $ 8,809

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- Definition Derivative, Loans Sold, Notional Amount + References No definition available. + Details
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Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration