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Other Noninterest Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Noninterest Expenses.
Telecommunication expenses	$ 391	$ 275
Travel and educational expenses	289	348
Licenses and taxes expense	236	202
Provision for indemnifications	(140)
Other components of net periodic pension cost	(143)	(122)
All other noninterest expenses	1,631	1,618
Total other noninterest expenses	$ 2,264	$ 2,321

X

- Definition

Other noninterest expenses that are not separately presented in any other noninterest expense category.

+ References

No definition available.

+ Details

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Namespace Prefix:	cffi_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of expense related to estimated loss for indemnifications.

+ References

No definition available.

+ Details

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X

- Definition

Expense recognized in the period for travel, entertainment and employee education.

+ References

No definition available.

+ Details

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X

- Definition

The amount of expense incurred in the period for communication, which is the exchange of information by several methods.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.6)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

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X

- Definition

Amount of defined benefit plan cost (credit), classified as other.

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Data Type:	xbrli:monetaryItemType
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- References

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- Definition

Amount of noninterest expense classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

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- Definition

Amount of tax expense, excluding income, excise, production and property taxes, and licenses and fees not related to production.

+ References

No definition available.

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