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Loans (Recorded Investment by Loan Class in Current and Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 3,631,355	$ 3,557,908	$ 3,179,465
Investment securities, nonaccrual	11,369	9,286
Nonaccrual with no allowance	5,611	8,616
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	7,721	6,209
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	949	1,554
Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	797	231
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	9,467	7,994
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3,610,519	3,540,628
Commercial Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	639,368	798,409	571,222
Investment securities, nonaccrual	602	1,975
Nonaccrual with no allowance	477	1,502
Commercial Business [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	659	264
Commercial Business [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	34	87
Commercial Business [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	797	0
Commercial Business [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,490	351
Commercial Business [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	637,276	796,083
Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,415,486	1,256,525	1,108,315
Investment securities, nonaccrual	6,414	2,906
Nonaccrual with no allowance	781	2,709
Commercial Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	69	822
Commercial Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	26
Commercial Mortgage [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
Commercial Mortgage [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	69	848
Commercial Mortgage [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,409,003	1,252,771
Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	563,579	586,537	560,717
Investment securities, nonaccrual	2,373	2,587
Nonaccrual with no allowance	2,373	2,587
Residential Real Estate Loans [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,148	984
Residential Real Estate Loans [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	141	60
Residential Real Estate Loans [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
Residential Real Estate Loans [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,289	1,044
Residential Real Estate Loans [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	559,917	582,906
Residential Real Estate Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	75,515	86,708	101,048
Investment securities, nonaccrual	200	323
Nonaccrual with no allowance	200	323
Residential Real Estate Lines [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	18	40
Residential Real Estate Lines [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3	15
Residential Real Estate Lines [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
Residential Real Estate Lines [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	21	55
Residential Real Estate Lines [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	75,294	86,330
Consumer Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	923,052	812,816	822,179
Investment securities, nonaccrual	1,780	1,495
Nonaccrual with no allowance	1,780	1,495
Consumer Indirect [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	5,706	3,966
Consumer Indirect [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	770	1,348
Consumer Indirect [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
Consumer Indirect [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	6,476	5,314
Consumer Indirect [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	914,796	806,007
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	14,355	16,913	$ 15,984
Other Consumer [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	121	133
Other Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1	18
Other Consumer [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	231
Other Consumer [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	122	382
Other Consumer [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 14,233	$ 16,531

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