Accounting Policies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) Subsidiary Branch	Dec. 31, 2020 USD ($)
Accounting Policies [Abstract]
Number of subsidiaries | Subsidiary	2
Number of branch offices | Branch	16
COVID-19 [Member]
COVID-19 [Abstract]
Loan modifications	$ 7.1	$ 7.4
Loan modification percentage of total loan portfolio	0.90%
COVID-19 [Member] | Minimum [Member]
COVID-19 [Abstract]
Principal and interest payment deferrals period	60 days
COVID-19 [Member] | Maximum [Member]
COVID-19 [Abstract]
Principal and interest payment deferrals period	90 days
COVID-19 [Member] | Initial Modification [Member]
COVID-19 [Abstract]
Loan modifications	$ 2.4
COVID-19 [Member] | Second Modification [Member]
COVID-19 [Abstract]
Loan modifications	$ 4.7