Loans and Allowance for Credit Losses on Loans (Financing Receivable, Nonaccrual) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	$ 7,100
Non-Accrual Loans Without an Allowance	496
Total Non-Accrual Loans	7,596	$ 7,034
Non-Accrual Loans	7,596	7,034
Total Collateral -Dependent Non-Accrual Loans
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	937
Non-Accrual Loans	937
Real Estate
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	248
Non-Accrual Loans	248
General Business Assets
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	689
Non-Accrual Loans	689
Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	450
Non-Accrual Loans Without an Allowance	62
Total Non-Accrual Loans	512	0
Non-Accrual Loans	512	0
Commercial real estate, non owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	351
Non-Accrual Loans Without an Allowance	15
Commercial real estate, owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	99
Non-Accrual Loans Without an Allowance	47
Commercial
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	1,549
Non-Accrual Loans Without an Allowance	58
Total Non-Accrual Loans	1,607	784
Non-Accrual Loans	1,607	784
Commercial | Total Collateral -Dependent Non-Accrual Loans
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	689
Non-Accrual Loans	689
Commercial | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	0
Non-Accrual Loans	0
Commercial | General Business Assets
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	689
Non-Accrual Loans	689
Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	3,136
Non-Accrual Loans Without an Allowance	341
Total Non-Accrual Loans	3,477	4,096
Non-Accrual Loans	3,477	4,096
Residential real estate | Total Collateral -Dependent Non-Accrual Loans
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	248
Non-Accrual Loans	248
Residential real estate | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	248
Non-Accrual Loans	248
Residential real estate | General Business Assets
Financing Receivable, Nonaccrual [Line Items]
Total Non-Accrual Loans	0
Non-Accrual Loans	0
Home equity
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	1,961
Non-Accrual Loans Without an Allowance	35
Total Non-Accrual Loans	1,996	2,130
Non-Accrual Loans	1,996	2,130
Consumer
Financing Receivable, Nonaccrual [Line Items]
Non-Accrual Loans With an Allowance	4
Non-Accrual Loans Without an Allowance	0
Total Non-Accrual Loans	4	24
Non-Accrual Loans	$ 4	$ 24