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Fair Value of Assets and Liabilities - Financial Assets Measured at Fair Value on Non-Recurring Basis (Details) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Impaired loans, net |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Total assets measured at fair value | $ 0 | $ 0
Nonrecurring |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Total assets measured at fair value | 72,000 | 72,000
Nonrecurring | Other real estate owned, net |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Total assets measured at fair value | 72,000 | 72,000
Level 3 | Nonrecurring |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Total assets measured at fair value | 72,000 | 72,000
Level 3 | Nonrecurring | Other real estate owned, net |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Total assets measured at fair value | $ 72,000 | $ 72,000
Other real estate owned, net, valuation technique | cffi:ValuationTechniqueAppraisalsMember | cffi:ValuationTechniqueAppraisalsMember
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Level 3 | Nonrecurring | Other real estate owned, net | Minimum |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Other real estate owned, input | 0.75 | 0.75
Level 3 | Nonrecurring | Other real estate owned, net | Maximum |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Other real estate owned, input | 0.80 | 0.80
Level 3 | Nonrecurring | Other real estate owned, net | Weighted Average |  |
Fair value assets and liabilities - Nonrecurring Basis |  |
Other real estate owned, input | 0.79 | 0.79

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- Definition Value of input used to measure real estate owned by financial institution by financial institution which is not directly related to its business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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