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Regulatory Capital Matters (Narrative) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Tier One Leverage Capital Required to be Well Capitalized to Average Assets | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Capital Required to be Well Capitalized to Risk Weighted Assets | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Proceeds from sale of office buildings, furniture and fixtures | $ 3,200,000 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment |
Gain on sale of fixed assets | 1,100,000 us-gaap_GainLossOnSaleOfPropertyPlantEquipment |
Percent of Qualified Thrift Lender test requires | 65.00%cfbk_MinimumPercentageOfAssetsToBeMaintainedInHousingRelatedFinanceAndOtherSpecifiedAreasAsPerQualifiedThriftLenderTest |
Opening Balance in Liquidation Account | 14,300,000 cfbk_OpeningBalanceInLiquidationAccount |
CF Bank [Member] |  |
Tier One Leverage Capital Required to be Well Capitalized to Average Assets | 8.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = cfbk_CfBankMember |
Capital Required to be Well Capitalized to Risk Weighted Assets | 12.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = cfbk_CfBankMember |
Capital contribution from Holding Company |  | $ 1,500,000 cfbk_PaymentsForInvestmentsInBankingSubsidiary / dei_LegalEntityAxis = cfbk_CfBankMember

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- Definition Minimum percentage of assets to be maintained in housing-related finance and other specified areas as per qualified thrift lender test. + References No definition available. + Details
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- Definition Opening balance in liquidation account. + References No definition available. + Details
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- Definition Payments For Investments In Banking Subsidiary + References No definition available. + Details
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- Definition The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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