Allowance for Credit Losses on Loans (Allowance for Credit Losses on Loans Rollforward Analysis) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 38,027	$ 39,088	$ 44,106
Charge-offs	(577)	(184)	(663)
Recoveries	57	552	246
Provision	3,550	(1,429)	(4,601)
Ending Balance	41,057	38,027	39,088
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	18,435	18,933	22,065
Charge-offs	(373)	0	0
Recoveries	0	445	0
Provision	6,082	(943)	(3,132)
Ending Balance	24,144	18,435	18,933
Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	10,356	10,832	12,228
Charge-offs	(37)	(36)	(307)
Recoveries	12	29	41
Provision	(2,243)	(469)	(1,130)
Ending Balance	8,088	10,356	10,832
Total Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	28,791	29,765	34,293
Charge-offs	(410)	(36)	(307)
Recoveries	12	474	41
Provision	3,839	(1,412)	(4,262)
Ending Balance	32,232	28,791	29,765
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	7,740	7,860	8,042
Charge-offs	0	0	(107)
Recoveries	3	21	89
Provision	(340)	(141)	(164)
Ending Balance	7,403	7,740	7,860
Home Equity [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,115	1,069	1,300
Charge-offs	0	0	(183)
Recoveries	10	12	91
Provision	(77)	34	(139)
Ending Balance	1,048	1,115	1,069
Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	381	394	471
Charge-offs	(167)	(148)	(66)
Recoveries	32	45	25
Provision	128	90	(36)
Ending Balance	374	381	394
Total Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,496	1,463	1,771
Charge-offs	(167)	(148)	(249)
Recoveries	42	57	116
Provision	51	124	(175)
Ending Balance	$ 1,422	$ 1,496	$ 1,463