Loans (Summary of Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 4,283,852	$ 4,272,925
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[2]	1,628,620	1,639,062
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[3]	614,892	641,555
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		2,243,512	2,280,617
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[4]	1,777,974	1,726,975
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		246,097	247,697
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[5]	16,269	17,636
Total Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 262,366	$ 265,333

[1] Includes net unamortized loan origination costs of $8.3 million and $6.7 million, respectively, at March 31, 2022 and December 31, 2021 and net unamortized premiums on purchased loans of $389 thousand and $414 thousand, respectively, at March 31, 2022 and December 31, 2021.

[2] CRE consists of commercial mortgages primarily secured by 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. C&I also includes $12.5 million and $38.0 million, respectively, of PPP loans as of March 31, 2022 and December 31, 2021.

[4] Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties.

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