Statutory Financial Data, Risk-Based Capital and Dividend Restrictions - Narrative (Details)	12 Months Ended
Dec. 31, 2021
Insurance [Abstract]
Dividend restriction percentage of statutory surplus of preceding year	10.00%

Dividend restriction percentage of statutory surplus of preceding year.

No definition available.

Name:	cnfr_DividendRestrictionPercentageOfStatutorySurplusOfPrecedingYear
Namespace Prefix:	cnfr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration