Loans (Collateral dependent individually analyzed loans) (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total loans	[1]	$ 5,137,838	$ 5,647,706
Related allowance on collateral dependent individually analyzed loans		41,960	41,057
Commercial real estate
Total loans	[2]	2,154,504	2,106,359
Related allowance on collateral dependent individually analyzed loans		26,485	24,144	$ 18,435	$ 18,933
Commercial & industrial
Total loans	[3]	542,474	605,072
Related allowance on collateral dependent individually analyzed loans		7,277	8,088	10,356	10,832
Total commercial
Total loans		2,696,978	2,711,431
Related allowance on collateral dependent individually analyzed loans		33,762	32,232	28,791	29,765
Residential real estate
Total loans	[4]	2,126,171	2,604,478
Related allowance on collateral dependent individually analyzed loans		6,832	7,403	7,740	7,860
Home Equity
Total loans		297,119	312,594
Related allowance on collateral dependent individually analyzed loans		1,031	1,048	1,115	1,069
Other Consumer
Total loans	[5]	17,570	19,203
Related allowance on collateral dependent individually analyzed loans		335	374	381	394
Total Consumer [Member]
Total loans		314,689	331,797
Related allowance on collateral dependent individually analyzed loans		1,366	1,422	$ 1,496	$ 1,463
Collateral Dependent Individually Analyzed [Member]
Total loans		11,591	34,640
Related allowance on collateral dependent individually analyzed loans		1,511	97
Collateral Dependent Individually Analyzed [Member] | Commercial real estate
Total loans	[6]	10,053	32,827
Related allowance on collateral dependent individually analyzed loans	[6]	1,252	97
Collateral Dependent Individually Analyzed [Member] | Commercial & industrial
Total loans	[7]	515	682
Related allowance on collateral dependent individually analyzed loans	[7]	259	0
Collateral Dependent Individually Analyzed [Member] | Total commercial
Total loans		10,568	33,509
Related allowance on collateral dependent individually analyzed loans		1,511	97
Collateral Dependent Individually Analyzed [Member] | Residential real estate
Total loans	[8]	1,023	1,131
Related allowance on collateral dependent individually analyzed loans	[8]	$ 0	$ 0

[1] Includes net unamortized loan origination costs of $10.9 million and $13.0 million, respectively, at December 31, 2024 and 2023 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $242 thousand and $286 thousand, respectively, at December 31, 2024 and 2023.

[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 real estate.

[4] Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. Also, includes a $1.5 million negative basis adjustment associated with fair value hedges at December 31, 2024. See Note 9 for additional disclosure.

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

[6] Secured by income-producing property.

[7] Secured by business assets.

[8] Secured by one- to four-family residential properties.