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v2.4.1.9

Parent Company Only Condensed Financial Information (Condensed Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Interest income | $ 10,611 us-gaap_InterestAndDividendIncomeOperating | $ 7,500 us-gaap_InterestAndDividendIncomeOperating | $ 7,268 us-gaap_InterestAndDividendIncomeOperating
Other income | 414 us-gaap_NoninterestIncomeOtherOperatingIncome | 208 us-gaap_NoninterestIncomeOtherOperatingIncome | 81 us-gaap_NoninterestIncomeOtherOperatingIncome
Interest expense | 1,889 us-gaap_InterestExpense | 2,113 us-gaap_InterestExpense | 2,633 us-gaap_InterestExpense
Loss before income tax and undistributed subsidiaries' operations | (479)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 918 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 3,766 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Net income (loss) | 479 us-gaap_NetIncomeLoss | (918)us-gaap_NetIncomeLoss | (3,766)us-gaap_NetIncomeLoss
Comprehensive loss | 432 us-gaap_ComprehensiveIncomeNetOfTax | (927)us-gaap_ComprehensiveIncomeNetOfTax | (4,045)us-gaap_ComprehensiveIncomeNetOfTax
Parent Company [Member] |  |  |
Interest income | 5 us-gaap_InterestAndDividendIncomeOperating / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 17 us-gaap_InterestAndDividendIncomeOperating / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3 us-gaap_InterestAndDividendIncomeOperating / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other income | 260 us-gaap_NoninterestIncomeOtherOperatingIncome / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 103 us-gaap_NoninterestIncomeOtherOperatingIncome / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Interest expense | 164 us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 167 us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 180 us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other expense | 687 us-gaap_InterestExpenseOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 666 us-gaap_InterestExpenseOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 400 us-gaap_InterestExpenseOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Loss before income tax and undistributed subsidiaries' operations | (586)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (713)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (577)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Effect of subsidiaries' operations | 1,065 cfbk_EffectOfSubsidiariesOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (205)cfbk_EffectOfSubsidiariesOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,189)cfbk_EffectOfSubsidiariesOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net income (loss) | 479 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (918)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,766)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Comprehensive loss | $ 432 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ (927)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ (4,045)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=35737396 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 + Details
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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1, 2 , 3, 4, 5 -Article 9 + Details
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