Loans (Past Due Loans) (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Total loans	[1]	$ 5,137,838	$ 5,647,706
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans	[2]	2,154,504	2,106,359
Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans	[3]	542,474	605,072
Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		2,696,978	2,711,431
Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans	[4]	2,126,171	2,604,478
Home Equity
Financing Receivable, Past Due [Line Items]
Total loans		297,119	312,594
Other Consumer
Financing Receivable, Past Due [Line Items]
Total loans	[5]	17,570	19,203
Total Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total loans		314,689	331,797
Current
Financing Receivable, Past Due [Line Items]
Total loans		5,125,856	5,636,361
Current | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans		2,154,504	2,106,359
Current | Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans		541,574	605,062
Current | Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		2,696,078	2,711,421
Current | Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans		2,118,430	2,596,362
Current | Home Equity
Financing Receivable, Past Due [Line Items]
Total loans		294,172	309,398
Current | Other Consumer
Financing Receivable, Past Due [Line Items]
Total loans		17,176	19,180
Current | Total Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total loans		311,348	328,578
30-59
Financing Receivable, Past Due [Line Items]
Total loans		5,668	6,748
30-59 | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans		0	0
30-59 | Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans		518	10
30-59 | Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		518	10
30-59 | Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans		3,476	4,369
30-59 | Home Equity
Financing Receivable, Past Due [Line Items]
Total loans		1,630	2,349
30-59 | Other Consumer
Financing Receivable, Past Due [Line Items]
Total loans		44	20
30-59 | Total Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total loans		1,674	2,369
60-89
Financing Receivable, Past Due [Line Items]
Total loans		3,034	1,853
60-89 | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans		0	0
60-89 | Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans		382	0
60-89 | Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		382	0
60-89 | Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans		1,892	1,738
60-89 | Home Equity
Financing Receivable, Past Due [Line Items]
Total loans		410	112
60-89 | Other Consumer
Financing Receivable, Past Due [Line Items]
Total loans		350	3
60-89 | Total Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total loans		760	115
Over 90
Financing Receivable, Past Due [Line Items]
Total loans		3,280	2,744
Over 90 | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Over 90 | Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Over 90 | Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Over 90 | Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans		2,373	2,009
Over 90 | Home Equity
Financing Receivable, Past Due [Line Items]
Total loans		907	735
Over 90 | Other Consumer
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Over 90 | Total Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total loans		907	735
Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		11,982	11,345
Total Past Due | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans		0	0
Total Past Due | Commercial & industrial
Financing Receivable, Past Due [Line Items]
Total loans		900	10
Total Past Due | Total commercial
Financing Receivable, Past Due [Line Items]
Total loans		900	10
Total Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans		7,741	8,116
Total Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Total loans		2,947	3,196
Total Past Due | Other Consumer
Financing Receivable, Past Due [Line Items]
Total loans		394	23
Total Past Due | Total Consumer [Member]
Financing Receivable, Past Due [Line Items]
Total loans		$ 3,341	$ 3,219

[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.