Loans (Past Due Loans) (Details) - USD ($) $ in Thousands		Sep. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Total loans	[1]	$ 5,122,582	$ 5,137,838
Current
Financing Receivable, Past Due [Line Items]
Total loans		5,114,470	5,125,856
30-59
Financing Receivable, Past Due [Line Items]
Total loans		2,736	5,668
60-89
Financing Receivable, Past Due [Line Items]
Total loans		2,096	3,034
90 or More
Financing Receivable, Past Due [Line Items]
Total loans		3,280	3,280
Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		8,112	11,982
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans	[2]	2,156,750	2,154,504
Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Total loans		2,156,750	2,154,504
Commercial real estate | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Commercial real estate | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Commercial real estate | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Commercial real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans	[3]	568,317	542,474
Commercial & industrial | Current
Financing Receivable, Past Due [Line Items]
Total loans		568,309	541,574
Commercial & industrial | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		8	518
Commercial & industrial | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		0	382
Commercial & industrial | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Commercial & industrial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		8	900
Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		2,725,067	2,696,978
Total commercial | Current
Financing Receivable, Past Due [Line Items]
Total loans		2,725,059	2,696,078
Total commercial | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		8	518
Total commercial | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		0	382
Total commercial | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Total commercial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		8	900
Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans	[4]	2,073,740	2,126,171
Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Total loans		2,067,270	2,118,430
Residential real estate | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		2,058	3,476
Residential real estate | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		1,300	1,892
Residential real estate | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		3,112	2,373
Residential real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		6,470	7,741
Home equity
Financing Receivable, Past Due [Line Items]
Total loans		307,371	297,119
Home equity | Current
Financing Receivable, Past Due [Line Items]
Total loans		305,788	294,172
Home equity | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		624	1,630
Home equity | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		791	410
Home equity | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		168	907
Home equity | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,583	2,947
Other
Financing Receivable, Past Due [Line Items]
Total loans	[5]	16,404	17,570
Other | Current
Financing Receivable, Past Due [Line Items]
Total loans		16,353	17,176
Other | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		46	44
Other | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		5	350
Other | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Other | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		51	394
Total consumer
Financing Receivable, Past Due [Line Items]
Total loans		323,775	314,689
Total consumer | Current
Financing Receivable, Past Due [Line Items]
Total loans		322,141	311,348
Total consumer | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		670	1,674
Total consumer | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		796	760
Total consumer | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		168	907
Total consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 1,634	$ 3,341

[1] Includes net unamortized loan origination costs of $11.6 million and $10.9 million, respectively, at September 30, 2025 and December 31, 2024 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $211 thousand and $242 thousand, respectively, at September 30, 2025 and December 31, 2024.

[2] CRE consists of commercial mortgages primarily secured by non-owner occupied income-producing property, as well as construction and development loans. Construction and development loans are made to businesses for land development or the on-site construction of industrial, commercial, or residential buildings.

[3] C&I consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by owner occupied real estate.

[4] Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. Also, includes negative basis adjustments associated with fair value hedges of $255 thousand and $1.5 million, respectively, at September 30, 2025 and December 31, 2024. See Note 8 for additional disclosure.

[5] Other consists of loans to individuals secured by general aviation aircraft and other personal installment loans.