Loans (Past Due Loans) (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total past due		$ 14,672	$ 15,689
Current		4,272,969	3,877,310
Total loans	[1]	4,287,641	3,892,999
30-59
Financing Receivable, Past Due [Line Items]
Total past due		4,705	6,418
60-89
Financing Receivable, Past Due [Line Items]
Total past due		3,564	2,884
Over 90
Financing Receivable, Past Due [Line Items]
Total past due		6,403	6,387
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total past due		431	1,433
Current		1,630,567	1,546,139
Total loans	[2]	1,630,998	1,547,572
Commercial Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Total past due		0	830
Commercial Real Estate | 60-89
Financing Receivable, Past Due [Line Items]
Total past due		0	0
Commercial Real Estate | Over 90
Financing Receivable, Past Due [Line Items]
Total past due		431	603
Commercial & Industrial
Financing Receivable, Past Due [Line Items]
Total past due		3	1
Current		852,442	585,288
Total loans	[3]	852,445	585,289
Commercial & Industrial | 30-59
Financing Receivable, Past Due [Line Items]
Total past due		2	1
Commercial & Industrial | 60-89
Financing Receivable, Past Due [Line Items]
Total past due		1	0
Commercial & Industrial | Over 90
Financing Receivable, Past Due [Line Items]
Total past due		0	0
Total Commercial
Financing Receivable, Past Due [Line Items]
Total past due		434	1,434
Current		2,483,009	2,131,427
Total loans		2,483,443	2,132,861
Total Commercial | 30-59
Financing Receivable, Past Due [Line Items]
Total past due		2	831
Total Commercial | 60-89
Financing Receivable, Past Due [Line Items]
Total past due		1	0
Total Commercial | Over 90
Financing Receivable, Past Due [Line Items]
Total past due		431	603
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Total past due		12,499	11,429
Current		1,495,724	1,437,661
Total loans	[4]	1,508,223	1,449,090
Residential Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Total past due		3,858	4,574
Residential Real Estate | 60-89
Financing Receivable, Past Due [Line Items]
Total past due		3,545	2,155
Residential Real Estate | Over 90
Financing Receivable, Past Due [Line Items]
Total past due		5,096	4,700
Home Equity
Financing Receivable, Past Due [Line Items]
Total past due		1,633	2,696
Current		275,999	288,178
Total loans		277,632	290,874
Home Equity | 30-59
Financing Receivable, Past Due [Line Items]
Total past due		829	971
Home Equity | 60-89
Financing Receivable, Past Due [Line Items]
Total past due		16	729
Home Equity | Over 90
Financing Receivable, Past Due [Line Items]
Total past due		788	996
Other
Financing Receivable, Past Due [Line Items]
Total past due		106	130
Current		18,237	20,044
Total loans	[5]	18,343	20,174
Other | 30-59
Financing Receivable, Past Due [Line Items]
Total past due		16	42
Other | 60-89
Financing Receivable, Past Due [Line Items]
Total past due		2	0
Other | Over 90
Financing Receivable, Past Due [Line Items]
Total past due		88	88
Total Consumer
Financing Receivable, Past Due [Line Items]
Total past due		1,739	2,826
Current		294,236	308,222
Total loans		295,975	311,048
Total Consumer | 30-59
Financing Receivable, Past Due [Line Items]
Total past due		845	1,013
Total Consumer | 60-89
Financing Receivable, Past Due [Line Items]
Total past due		18	729
Total Consumer | Over 90
Financing Receivable, Past Due [Line Items]
Total past due		$ 876	$ 1,084

[1] Includes net unamortized loan origination fees of $453 thousand at June 30, 2020 and net unamortized loan origination costs of $5.3 million, at December 31, 2019 and net unamortized premiums on purchased loans of $1.1 million and $995 thousand, respectively, at June 30, 2020 and December 31, 2019.

[2] Commercial real estate (“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] Commercial and industrial (“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 $212.2 million of PPP loans as of June 30, 2020.

[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.