Loans (Past Due Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Past due		$ 7,036	$ 10,411
Current		4,276,816	4,262,514
Total loans	[1]	4,283,852	4,272,925
30-59
Financing Receivable, Past Due [Line Items]
Past due		1,549	2,388
60-89
Financing Receivable, Past Due [Line Items]
Past due		141	3,253
Over 90
Financing Receivable, Past Due [Line Items]
Past due		5,346	4,770
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Past due		0	0
Current		1,628,620	1,639,062
Total loans	[2]	1,628,620	1,639,062
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		0	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		108	3
Current		614,784	641,552
Total loans	[3]	614,892	641,555
Commercial & Industrial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		108	3
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		108	3
Current		2,243,404	2,280,614
Total loans		2,243,512	2,280,617
Total Commercial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		108	3
Total Commercial | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	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		6,467	9,622
Current		1,771,507	1,717,353
Total loans	[4]	1,777,974	1,726,975
Residential Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		1,299	1,784
Residential Real Estate | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	3,176
Residential Real Estate | Over 90
Financing Receivable, Past Due [Line Items]
Past due		5,168	4,662
Home Equity
Financing Receivable, Past Due [Line Items]
Past due		431	765
Current		245,666	246,932
Total loans		246,097	247,697
Home Equity | 30-59
Financing Receivable, Past Due [Line Items]
Past due		112	580
Home Equity | 60-89
Financing Receivable, Past Due [Line Items]
Past due		141	77
Home Equity | Over 90
Financing Receivable, Past Due [Line Items]
Past due		178	108
Other
Financing Receivable, Past Due [Line Items]
Past due		30	21
Current		16,239	17,615
Total loans	[5]	16,269	17,636
Other | 30-59
Financing Receivable, Past Due [Line Items]
Past due		30	21
Other | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	0
Other | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Total Consumer
Financing Receivable, Past Due [Line Items]
Past due		461	786
Current		261,905	264,547
Total loans		262,366	265,333
Total Consumer | 30-59
Financing Receivable, Past Due [Line Items]
Past due		142	601
Total Consumer | 60-89
Financing Receivable, Past Due [Line Items]
Past due		141	77
Total Consumer | Over 90
Financing Receivable, Past Due [Line Items]
Past due		$ 178	$ 108

[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.