Loans (Past Due Loans) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Past due		$ 20,301	$ 11,345
Current		5,494,569	5,636,361
Total loans	[1]	5,514,870	5,647,706
30-59
Financing Receivable, Past Due [Line Items]
Past due		2,510	6,748
60-89
Financing Receivable, Past Due [Line Items]
Past due		14,865	1,853
Over 90
Financing Receivable, Past Due [Line Items]
Past due		2,926	2,744
Commercial real estate
Financing Receivable, Past Due [Line Items]
Past due		10,476	0
Current		2,091,615	2,106,359
Total loans	[2]	2,102,091	2,106,359
Commercial real estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		0	0
Commercial real estate | 60-89
Financing Receivable, Past Due [Line Items]
Past due		10,476	0
Commercial real estate | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Commercial & industrial
Financing Receivable, Past Due [Line Items]
Past due		3	10
Current		566,276	605,062
Total loans	[3]	566,279	605,072
Commercial & industrial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		3	10
Commercial & industrial | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	0
Commercial & industrial | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Total commercial
Financing Receivable, Past Due [Line Items]
Past due		10,479	10
Current		2,657,891	2,711,421
Total loans		2,668,370	2,711,431
Total commercial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		3	10
Total commercial | 60-89
Financing Receivable, Past Due [Line Items]
Past due		10,476	0
Total commercial | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Past due		6,947	8,116
Current		2,522,450	2,596,362
Total loans	[4]	2,529,397	2,604,478
Residential real estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		912	4,369
Residential real estate | 60-89
Financing Receivable, Past Due [Line Items]
Past due		3,856	1,738
Residential real estate | Over 90
Financing Receivable, Past Due [Line Items]
Past due		2,179	2,009
Home equity
Financing Receivable, Past Due [Line Items]
Past due		2,800	3,196
Current		296,579	309,398
Total loans		299,379	312,594
Home equity | 30-59
Financing Receivable, Past Due [Line Items]
Past due		1,520	2,349
Home equity | 60-89
Financing Receivable, Past Due [Line Items]
Past due		533	112
Home equity | Over 90
Financing Receivable, Past Due [Line Items]
Past due		747	735
Other
Financing Receivable, Past Due [Line Items]
Past due		75	23
Current		17,649	19,180
Total loans	[5]	17,724	19,203
Other | 30-59
Financing Receivable, Past Due [Line Items]
Past due		75	20
Other | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	3
Other | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Total consumer
Financing Receivable, Past Due [Line Items]
Past due		2,875	3,219
Current		314,228	328,578
Total loans		317,103	331,797
Total consumer | 30-59
Financing Receivable, Past Due [Line Items]
Past due		1,595	2,369
Total consumer | 60-89
Financing Receivable, Past Due [Line Items]
Past due		533	115
Total consumer | Over 90
Financing Receivable, Past Due [Line Items]
Past due		$ 747	$ 735

[1] Includes net unamortized loan origination costs of $13.4 million and $13.0 million, respectively, at September 30, 2024 and December 31, 2023 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $249 thousand and $286 thousand, respectively, at September 30, 2024 and December 31, 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 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 a $19 thousand negative basis adjustment associated with fair value hedges at September 30, 2024. See Note 6 for additional disclosure.

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