Loans (Changes in the Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 49,836	$ 42,452	$ 45,413	$ 39,676
Charge-offs	(5,338)	(4,514)	(13,965)	(10,655)
Recoveries	3,740	2,361	9,642	8,755
Provision (benefit)	1,392	3,807	8,540	6,330
Ending balance	49,630	44,106	49,630	44,106
Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	13,418	10,140	12,585	11,099
Charge-offs	(146)	(20)	(263)	(262)
Recoveries	114	116	322	305
Provision (benefit)	(600)	1,288	142	382
Ending balance	12,786	11,524	12,786	11,524
Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	16,826	12,064	14,412	14,777
Charge-offs	0	0	(18)	0
Recoveries	972	1	976	2,020
Provision (benefit)	(1,521)	2,054	907	(2,678)
Ending balance	16,277	14,119	16,277	14,119
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4,646	2,140	3,301	1,604
Charge-offs	0	0	(102)	(56)
Recoveries	4	4	35	19
Provision (benefit)	(791)	210	625	787
Ending balance	3,859	2,354	3,859	2,354
Residential Real Estate Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	710	509	608	379
Charge-offs	0	(38)	(41)	(38)
Recoveries	0	3	0	20
Provision (benefit)	(173)	180	(30)	293
Ending balance	537	654	537	654
Consumer Indirect [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	13,306	17,332	14,238	11,611
Charge-offs	(4,848)	(4,058)	(12,477)	(9,216)
Recoveries	2,565	2,168	8,056	6,129
Provision (benefit)	3,583	(260)	4,789	6,658
Ending balance	14,606	15,182	14,606	15,182
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	930	267	269	206
Charge-offs	(344)	(398)	(1,064)	(1,083)
Recoveries	85	69	253	262
Provision (benefit)	894	335	2,107	888
Ending balance	$ 1,565	$ 273	$ 1,565	$ 273