Loans (Changes in the Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 40,966	$ 49,828	$ 39,676	$ 52,420
Charge-offs	(3,228)	(1,729)	(6,141)	(4,593)
Recoveries	4,268	2,123	6,394	4,100
Provision (benefit)	446	(3,857)	2,523	(5,562)
Ending balance	42,452	46,365	42,452	46,365
Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	10,121	12,670	11,099	13,580
Charge-offs	(191)	(92)	(242)	(178)
Recoveries	101	379	189	617
Provision (benefit)	109	(1,952)	(906)	(3,014)
Ending balance	10,140	11,005	10,140	11,005
Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	13,746	22,672	14,777	21,763
Charge-offs	0	0	0	(203)
Recoveries	2,018	7	2,019	7
Provision (benefit)	(3,700)	(1,017)	(4,732)	95
Ending balance	12,064	21,662	12,064	21,662
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,852	3,109	1,604	3,924
Charge-offs	(56)	(56)	(56)	(67)
Recoveries	10	59	15	64
Provision (benefit)	334	(813)	577	(1,622)
Ending balance	2,140	2,299	2,140	2,299
Residential Real Estate Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	425	482	379	674
Charge-offs	0	0	0	(70)
Recoveries	12	0	17	0
Provision (benefit)	72	(87)	113	(209)
Ending balance	509	395	509	395
Consumer Indirect [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	14,568	10,557	11,611	12,165
Charge-offs	(2,672)	(1,157)	(5,158)	(3,570)
Recoveries	2,025	1,583	3,961	3,253
Provision (benefit)	3,411	(235)	6,918	(1,100)
Ending balance	17,332	10,748	17,332	10,748
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	254	338	206	314
Charge-offs	(309)	(424)	(685)	(505)
Recoveries	102	95	193	159
Provision (benefit)	220	247	553	288
Ending balance	$ 267	$ 256	$ 267	$ 256