Loans (Recorded Investment by Loan Class in Current and Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 3,710,490	$ 3,631,355
Investment securities, nonaccrual	6,548	11,369
Nonaccrual with no allowance	6,465	5,611
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	9,034	7,721
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3,358	949
Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	797
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	12,392	9,467
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3,691,550	3,610,519
Commercial Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	610,587	639,368
Investment securities, nonaccrual	422	602
Nonaccrual with no allowance	369	477
Commercial Business [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	108	659
Commercial Business [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,392	34
Commercial Business [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	797
Commercial Business [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,500	1,490
Commercial Business [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	608,665	637,276
Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,451,016	1,415,486
Investment securities, nonaccrual	836	6,414
Nonaccrual with no allowance	806	781
Commercial Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	15	69
Commercial Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
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	15	69
Commercial Mortgage [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,450,165	1,409,003
Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	561,155	563,579
Investment securities, nonaccrual	2,738	2,373
Nonaccrual with no allowance	2,738	2,373
Residential Real Estate Loans [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,052	1,148
Residential Real Estate Loans [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	129	141
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	1,181	1,289
Residential Real Estate Loans [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	557,236	559,917
Residential Real Estate Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	72,972	75,515
Investment securities, nonaccrual	160	200
Nonaccrual with no allowance	160	200
Residential Real Estate Lines [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	97	18
Residential Real Estate Lines [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	23	3
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	120	21
Residential Real Estate Lines [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	72,692	75,294
Consumer Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,000,252	923,052
Investment securities, nonaccrual	2,389	1,780
Nonaccrual with no allowance	2,389	1,780
Consumer Indirect [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	7,668	5,706
Consumer Indirect [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,814	770
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	9,482	6,476
Consumer Indirect [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	988,381	914,796
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	14,508	14,355
Investment securities, nonaccrual	3	0
Nonaccrual with no allowance	3	0
Other Consumer [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	94	121
Other Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	1
Other Consumer [Member] | Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
Other Consumer [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	94	122
Other Consumer [Member] | Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 14,411	$ 14,233