Loans (Past Due Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2026	Dec. 31, 2025
Financing Receivable, Past Due [Line Items]
Total loans	[1]	$ 5,014,885	$ 5,134,388
Current
Financing Receivable, Past Due [Line Items]
Total loans		4,998,437	5,123,005
30-59
Financing Receivable, Past Due [Line Items]
Total loans		10,818	5,309
60-89
Financing Receivable, Past Due [Line Items]
Total loans		2,730	2,726
90 or More
Financing Receivable, Past Due [Line Items]
Total loans		2,900	3,348
Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		16,448	11,383
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans	[2]	2,084,804	2,183,985
Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Total loans		2,078,230	2,183,337
Commercial real estate | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		6,574	648
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		6,574	648
Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans	[3]	568,177	564,082
Commercial & industrial | Current
Financing Receivable, Past Due [Line Items]
Total loans		567,707	564,075
Commercial & industrial | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		344	7
Commercial & industrial | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Commercial & industrial | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		126	0
Commercial & industrial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		470	7
Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		2,652,981	2,748,067
Total commercial | Current
Financing Receivable, Past Due [Line Items]
Total loans		2,645,937	2,747,412
Total commercial | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		6,918	655
Total commercial | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Total commercial | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		126	0
Total commercial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		7,044	655
Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans	[4]	2,029,092	2,050,399
Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Total loans		2,022,465	2,041,304
Residential real estate | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		3,018	3,533
Residential real estate | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		1,185	2,560
Residential real estate | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		2,424	3,002
Residential real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		6,627	9,095
Home equity
Financing Receivable, Past Due [Line Items]
Total loans		316,353	318,862
Home equity | Current
Financing Receivable, Past Due [Line Items]
Total loans		313,607	317,255
Home equity | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		854	1,095
Home equity | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		1,545	166
Home equity | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		347	346
Home equity | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		2,746	1,607
Other
Financing Receivable, Past Due [Line Items]
Total loans	[5]	16,459	17,060
Other | Current
Financing Receivable, Past Due [Line Items]
Total loans		16,428	17,034
Other | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		28	26
Other | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Other | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		3	0
Other | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		31	26
Total consumer
Financing Receivable, Past Due [Line Items]
Total loans		332,812	335,922
Total consumer | Current
Financing Receivable, Past Due [Line Items]
Total loans		330,035	334,289
Total consumer | 30-59
Financing Receivable, Past Due [Line Items]
Total loans		882	1,121
Total consumer | 60-89
Financing Receivable, Past Due [Line Items]
Total loans		1,545	166
Total consumer | 90 or More
Financing Receivable, Past Due [Line Items]
Total loans		350	346
Total consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 2,777	$ 1,633

[1] Includes net unamortized loan origination costs of $11.3 million and $11.0 million, respectively, at March 31, 2026 and December 31, 2025 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $193 thousand and $198 thousand, respectively, at March 31, 2026 and December 31, 2025.

[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 $923 thousand and $335 thousand, respectively, at March 31, 2026 and December 31, 2025. See Note 6 for additional disclosure.

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