Fair Value (Amount Of Gains And Losses From Changes In Fair Value Included In Earnings) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value [Abstract]
Interest income	$ 97	$ 65	$ 46
Change in fair value		(13)	14
Total change in fair value	$ 97cfbk_ChangeInFairValue	$ 52cfbk_ChangeInFairValue	$ 60cfbk_ChangeInFairValue

The amount of interest and fee income earned from loans held-for-sale, including mortgage loans, and interest earned from direct financing and sales-type leases held-for-sale.

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)

-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

-Article 9

Name:	us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldForSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration