COVID-19 and CARES Act Loan Activities (Details) - COVID-19 [Member] $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) Loan
Outstanding [Member]
COVID-19 [Abstract]
Number of loan deferrals | Loan	226
Amount of loan deferrals	$ 81.8
Period of loan deferrals	90 days
Paycheck Protection Program [Member]
COVID-19 [Abstract]
Number of loans closed | Loan	2,962
Amount of loans closed	$ 277.0
Number of loans forgiven by SBA | Loan	1,563
Amount of loans forgiven by SBA	$ 117.2
Amount of loans paid off or forgiven	$ 98.1
New Paycheck Protection Program [Member]
COVID-19 [Abstract]
Number of loans closed | Loan	1,857
Amount of loans closed	$ 99.1
Commercial Loan [Member]
COVID-19 [Abstract]
Number of loan deferrals | Loan	73
Amount of loan deferrals	$ 73.8
Commercial Loan [Member] | Four Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Loan	20
Amount of loan deferrals	$ 40.5
Commercial Loan [Member] | Five Times [Member]
COVID-19 [Abstract]
Number of loan deferrals | Loan	2
Amount of loan deferrals	$ 10.6
Residential Loan [Member]
COVID-19 [Abstract]
Number of loan deferrals | Loan	83
Amount of loan deferrals	$ 6.5
Consumer Loan [Member]
COVID-19 [Abstract]
Number of loan deferrals | Loan	70
Amount of loan deferrals	$ 1.5