Loans and Allowance for Credit Losses (Impaired Financing Receivables by Loan Class) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	$ 3,286		$ 2,553
Recorded investment with no allowance	2,828		1,922
Recorded investment with an allowance	20
Quarter-to-date average recorded investment	3,108	$ 4,999
Impaired Accruing Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	5,135		5,796
Recorded investment with no allowance	2,360		2,851
Recorded investment with an allowance	2,644		2,816
Related allowance	169		173
Quarter-to-date average recorded investment	5,412	6,628
Interest recorded investment	48	63
Other Impaired Accruing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	459		508
Recorded investment with no allowance	459		508
Quarter-to-date average recorded investment	493	1,413
Interest recorded investment	4	6
Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	8,880		8,857
Recorded investment with no allowance	5,647		5,281
Recorded investment with an allowance	2,664		2,816
Related allowance	169		173
Quarter-to-date average recorded investment	9,013	13,040
Interest recorded investment	52	69
Residential Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	1,797		882
Recorded investment with no allowance	1,526		803
Recorded investment with an allowance	20
Quarter-to-date average recorded investment	1,476	1,411
Residential Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	2,915		2,965
Recorded investment with no allowance	571		475
Recorded investment with an allowance	2,213		2,361
Related allowance	166		172
Quarter-to-date average recorded investment	2,809	3,530
Interest recorded investment	25	40
Residential Portfolio Segment [Member] | Other Impaired Accruing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	15		78
Recorded investment with no allowance	15		78
Quarter-to-date average recorded investment	29	853
Interest recorded investment	3	5
Residential Portfolio Segment [Member] | Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	4,727		3,925
Recorded investment with no allowance	2,112		1,356
Recorded investment with an allowance	2,233		2,361
Related allowance	166		172
Quarter-to-date average recorded investment	4,314	5,794
Interest recorded investment	28	45
Commercial Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	753		994
Recorded investment with no allowance	747		606
Quarter-to-date average recorded investment	906	3,012
Commercial Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	2,200		2,807
Recorded investment with no allowance	1,769		2,352
Recorded investment with an allowance	431		455
Related allowance	3		1
Quarter-to-date average recorded investment	2,581	3,065
Interest recorded investment	23	23
Commercial Real Estate Portfolio Segment [Member] | Other Impaired Accruing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	418		420
Recorded investment with no allowance	418		420
Quarter-to-date average recorded investment	417	510
Interest recorded investment	1	1
Commercial Real Estate Portfolio Segment [Member] | Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	3,371		4,221
Recorded investment with no allowance	2,934		3,378
Recorded investment with an allowance	431		455
Related allowance	3		1
Quarter-to-date average recorded investment	3,904	6,587
Interest recorded investment	24	24
Commercial Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	385		380
Recorded investment with no allowance	215		216
Quarter-to-date average recorded investment	321	251
Commercial Portfolio Segment [Member] | Other Impaired Accruing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	26		10
Recorded investment with no allowance	26		10
Quarter-to-date average recorded investment	9	50
Commercial Portfolio Segment [Member] | Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	411		390
Recorded investment with no allowance	241		226
Quarter-to-date average recorded investment	330	301
Consumer Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	15
Recorded investment with no allowance	15
Quarter-to-date average recorded investment	74	28
Consumer Portfolio Segment [Member] | Other Impaired Accruing Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Quarter-to-date average recorded investment	38
Consumer Portfolio Segment [Member] | Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	15
Recorded investment with no allowance	15
Quarter-to-date average recorded investment	112	28
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	336		297
Recorded investment with no allowance	325		297
Quarter-to-date average recorded investment	331	297
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Accruing Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	20		24
Recorded investment with no allowance	20		24
Quarter-to-date average recorded investment	22	33
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	356		321
Recorded investment with no allowance	345		$ 321
Quarter-to-date average recorded investment	$ 353	$ 330