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Loans (Recorded Investment In Nonaccrual Loans By Class Of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total over 90 days still on accrual loans	$ 366us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Total nonaccrual and nonperforming loans	2,007us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus	1,548us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual and nonperforming loans	305us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	369us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Non-owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total over 90 days still on accrual loans	366us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_NonOwnerOccupiedMember
Single-Family Residential[Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual and nonperforming loans	723us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember	549us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateMortgageResidentialSingleFamilyMember
Real Estate, Commercial, Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual and nonperforming loans	464us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember	477us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_RealEstateCommercialNonOwnerOccupiedMember
Real Estate, Commercial, Land Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual and nonperforming loans
Originated Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual and nonperforming loans	50us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember	51us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditOriginatedPortfolioMember
Purchased Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual and nonperforming loans	99us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember	102us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_HomeEquityLineOfCreditPurchasedPortfolioMember
Nonaccrual [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual and nonperforming loans	$ 1,641us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_NonaccrualMember	$ 1,548us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cfbk_NonaccrualMember

X

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

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