Loans (Collateral Dependent Individually Analyzed Loans) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[1]	$ 5,514,870	$ 5,647,706
Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans		19,903	34,640
Related allowance		500	97
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[2]	2,102,091	2,106,359
Commercial real estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[3]	18,259	32,827
Related allowance	[3]	500	97
Commercial & industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[4]	566,279	605,072
Commercial & industrial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[5]	616	682
Related allowance	[5]	0	0
Total commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans		2,668,370	2,711,431
Total commercial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans		18,875	33,509
Related allowance		500	97
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[6]	2,529,397	2,604,478
Residential real estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[7]	1,028	1,131
Related allowance	[7]	$ 0	$ 0

[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] Secured by income-producing property.

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

[5] Secured by business assets.

[6] 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.

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