Note 18 - Regulatory Matters (Details Textual)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2015
Capital Conservation Buffer Phase In Amount			2.50%	0.00%
Capital Conservation Buffer	2.50%	2.50%

Amount resulting from the phase-in of a capital conservation buffer.

No definition available.

Name:	fcap_CapitalConservationBufferPhaseInAmount
Namespace Prefix:	fcap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant