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Derivative Instruments (Schedule Of Notional Amount Of Loans Sold Through Mortgage Banking) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Derivative Instruments [Abstract]
Notional amount of loans sold	$ 9,173	$ 9,037

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- Definition

Derivative, Loans Sold, Notional Amount

+ References

No definition available.

+ Details

Name:	cfbk_DerivativeLoansSoldNotionalAmount
Namespace Prefix:	cfbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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