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v3.19.1

Fair Value (Financial Instruments Measured At Fair Value On A Non-Recurring Basis) (Details) - USD ($) | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Commercial Portfolio Segment [Member] |  |
Impaired loans: |  |
Impaired loans, Fair Value | $ 97,000 | $ 100,000
Commercial Portfolio Segment [Member] | Weighted Average [Member] | Measurement Input, Comparability Adjustment [Member] |  |
Impaired loans: |  |
Impaired loans, Measurement Input | 3.48 | 3.48
Single-Family Residential[Member] |  |
Impaired loans: |  |
Impaired loans, Fair Value | $ 109,000 | $ 110,000
Single-Family Residential[Member] | Weighted Average [Member] | Measurement Input, Comparability Adjustment [Member] |  |
Impaired loans: |  |
Impaired loans, Measurement Input | 3.61 | 3.61
Real Estate, Commercial, Non-Owner Occupied [Member] |  |
Impaired loans: |  |
Impaired loans, Fair Value | $ 4,476,000 | $ 2,804,000
Real Estate, Commercial, Non-Owner Occupied [Member] | Minimum [Member] | Measurement Input, Comparability Adjustment [Member] |  |
Impaired loans: |  |
Impaired loans, Measurement Input | (2.58) | 3.48
Real Estate, Commercial, Non-Owner Occupied [Member] | Maximum [Member] | Measurement Input, Comparability Adjustment [Member] |  |
Impaired loans: |  |
Impaired loans, Measurement Input | 8.61 | 8.61
Real Estate, Commercial, Non-Owner Occupied [Member] | Weighted Average [Member] | Measurement Input, Comparability Adjustment [Member] |  |
Impaired loans: |  |
Impaired loans, Measurement Input | 2.15 | 5.02

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- Definition Impaired loans at fair value. + 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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- Definition Impaired Loans Measurement Input + References No definition available. + Details
Name: | cfbk_ImpairedLoansMeasurementInput
Namespace Prefix: | cfbk_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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