Loans, Analysis of Allowance for Credit Losses (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2021 USD ($) Quarter	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Allowance for Credit Losses [Abstract]
Period of reasonable and supportable forecast	12 months
Provision for credit losses	$ (2,499)	$ 1,000	$ 12,707	$ 16,047
Decrease in allowance for credit losses attributed to historical loss factors	$ (2,400)
Allowance for credit losses to nonperforming loans	215.50%	180.70%	139.80%	180.70%
Credit loss reserve as percentage of total loans outstanding	1.28%	1.35%	1.50%	1.35%
Credit loss reserve as percentage of total loans outstanding excluding PPP loans	1.38%	1.46%		1.46%
Consumer [Member] | Consumer Indirect [Member]
Allowance for Credit Losses [Abstract]
Provision for credit losses	$ (2,279)		$ 2,575	$ 4,079
Net losses	$ 0
Number of rolling quarters | Quarter	12
Percentage of average losses	0.35%
Residential [Member]
Allowance for Credit Losses [Abstract]
Net losses	$ 0
Number of rolling quarters | Quarter	12
Percentage of average losses	0.07%