XML 82 R71.htm IDEA: XBRL DOCUMENT
v3.21.2

Regulatory Capital Matters (Narrative) (Details) - USD ($) $ in Thousands | Jan. 01, 2019 | Jun. 30, 2021
--- | --- | ---
Regulatory Capital Matters [Abstract] |  |
Future percent of common equity to risk-weighted assets | 2.50% |
Common Equity Tier 1 capital to risk-weighted assets, ratio | 4.50% |
Capital conservation buffer | 2.50% |
Common Equity Tier 1 capital to risk weighted assets, upon full implementation, ratio | 7.00% |
Tier 1 Capital To Risk Weighted Assets Ratio | 6.00% |
Tier 1 Capital To Risk Weighted Assets Upon Full Implementation Ratio | 8.50% |
Total Capital To Risk Weighted Assets Ratio | 8.00% |
Total Capital To Risk Weighted Assets Upon Full Implementation Ratio | 10.50% |
Minimum Leverage Ratio Based On Required Basel 3 Rules | 4.00% |
Opening balance in liquidation account |  | $ 14,300

X
- Definition Capital conservation buffer under Basel 3 Capital Rules. + References No definition available. + Details
Name: | cfbk_CapitalConservationBuffer
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Basel III Capital Rules requirements: Common equity tier 1 capital to risk-weighted assets, ratio + References No definition available. + Details
Name: | cfbk_CommonEquityTier1CapitalToRiskWeightedAssetsRatio
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Common Equity Tier 1 capital to risk weighted assets, upon full implementation, ratio + References No definition available. + Details
Name: | cfbk_CommonEquityTier1CapitalToRiskWeightedAssetsUponFullImplementationRatio
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Future percent, additional amount of common equity of risk-weighted assets + References No definition available. + Details
Name: | cfbk_FuturePercentCommonEquityOfRiskWeightedAssets
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum leverage ratio, based on required Basel 3 rules + References No definition available. + Details
Name: | cfbk_MinimumLeverageRatioBasedOnRequiredBasel3Rules
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Opening balance in liquidation account. + References No definition available. + Details
Name: | cfbk_OpeningBalanceInLiquidationAccount
Namespace Prefix: | cfbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Tier 1 capital to risk-weighted assets, ratio + References No definition available. + Details
Name: | cfbk_Tier1CapitalToRiskWeightedAssetsRatio
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier 1 capital to risk weighted assets, upon full implementation, ratio + References No definition available. + Details
Name: | cfbk_Tier1CapitalToRiskWeightedAssetsUponFullImplementationRatio
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total capital to risk-weighted assets, ratio. Based on the required Basel 3 Rules. + References No definition available. + Details
Name: | cfbk_TotalCapitalToRiskWeightedAssetsRatio
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total capital to risk weighted assets, upon full implementation, ratio. Based on the Basel 3 requirement rules. + References No definition available. + Details
Name: | cfbk_TotalCapitalToRiskWeightedAssetsUponFullImplementationRatio
Namespace Prefix: | cfbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | srt_RegulatoryCapitalRequirementsAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration