Loans - Loan Ratings by Loan Class, Commercial (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 3,509,809		$ 3,465,352
Accrued interest excluded from total	10,146		10,009
Current period gross charge-offs	1,631	$ 673
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	43,949		328,479
Financing receivable, year two, originated, fiscal year before current fiscal year	338,138		249,861
Financing receivable, year three, originated, two years before current fiscal year	247,294		97,516
Financing receivable, year four, originated, three years before current fiscal year	91,231		150,582
Financing receivable, year five, originated, four years before current fiscal year	146,272		90,533
Financing receivable, originated, more than five years before current fiscal year	328,763		267,041
Revolving Loans Amortized Cost Basis	275,646		282,841
Total loans	1,471,293		1,466,853
Accrued interest, current fiscal year	182		847
Accrued interest, fiscal year before current	831		646
Accrued interest, two years before current	676		234
Accrued interest, three years before current	239		473
Accrued interest, four years before current	476		387
Accrued interest, more than five years before current fiscal year	1,051		823
Accrued interest, revolving	1,132		999
Accrued interest excluded from total	4,587		4,409
Gross charge-offs, current fiscal year	0
Gross charge-offs, fiscal year before current	0
Gross charge-offs, two years before current	0
Gross charge-offs, three years before current	0
Gross charge-offs, four years before current	960
Gross charge-offs, more than five years before current	0
Gross charge-offs, revolving	0
Current period gross charge-offs	960	$ 0
Commercial | Non-watch (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	43,449		327,799
Financing receivable, year two, originated, fiscal year before current fiscal year	337,365		244,169
Financing receivable, year three, originated, two years before current fiscal year	241,373		96,354
Financing receivable, year four, originated, three years before current fiscal year	87,456		143,554
Financing receivable, year five, originated, four years before current fiscal year	139,230		87,295
Financing receivable, originated, more than five years before current fiscal year	321,959		255,422
Revolving Loans Amortized Cost Basis	273,380		279,936
Total loans	1,444,212		1,434,529
Commercial | Watch (7-8)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	500		680
Financing receivable, year two, originated, fiscal year before current fiscal year	773		4,721
Financing receivable, year three, originated, two years before current fiscal year	2,112		1,094
Financing receivable, year four, originated, three years before current fiscal year	3,710		6,459
Financing receivable, year five, originated, four years before current fiscal year	6,510		1,115
Financing receivable, originated, more than five years before current fiscal year	5,429		6,115
Revolving Loans Amortized Cost Basis	2,239		2,905
Total loans	21,273		23,089
Commercial | Substandard Accrual (9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		971
Financing receivable, year three, originated, two years before current fiscal year	3,809		68
Financing receivable, year four, originated, three years before current fiscal year	65		569
Financing receivable, year five, originated, four years before current fiscal year	532		2,123
Financing receivable, originated, more than five years before current fiscal year	1,339		5,466
Revolving Loans Amortized Cost Basis	27		0
Total loans	5,772		9,197
Commercial | Non-Accrual (10-11)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0
Financing receivable, year four, originated, three years before current fiscal year	0		0
Financing receivable, year five, originated, four years before current fiscal year	0		0
Financing receivable, originated, more than five years before current fiscal year	36		38
Revolving Loans Amortized Cost Basis	0		0
Total loans	36		38
Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	20,053		158,241
Financing receivable, year two, originated, fiscal year before current fiscal year	158,823		94,761
Financing receivable, year three, originated, two years before current fiscal year	91,130		59,141
Financing receivable, year four, originated, three years before current fiscal year	57,673		47,870
Financing receivable, year five, originated, four years before current fiscal year	54,868		30,929
Financing receivable, originated, more than five years before current fiscal year	118,018		100,822
Revolving Loans Amortized Cost Basis	238,722		240,699
Total loans	739,287		732,463
Accrued interest, current fiscal year	128		238
Accrued interest, fiscal year before current	333		178
Accrued interest, two years before current	185		146
Accrued interest, three years before current	141		105
Accrued interest, four years before current	118		181
Accrued interest, more than five years before current fiscal year	370		308
Accrued interest, revolving	986		890
Accrued interest excluded from total	2,261		2,046
Gross charge-offs, current fiscal year	0
Gross charge-offs, fiscal year before current	0
Gross charge-offs, two years before current	0
Gross charge-offs, three years before current	0
Gross charge-offs, four years before current	0
Gross charge-offs, more than five years before current	0
Gross charge-offs, revolving	0
Current period gross charge-offs	0
Commercial | Commercial and industrial | Non-watch (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	19,553		157,561
Financing receivable, year two, originated, fiscal year before current fiscal year	158,050		89,251
Financing receivable, year three, originated, two years before current fiscal year	85,209		58,292
Financing receivable, year four, originated, three years before current fiscal year	53,898		45,792
Financing receivable, year five, originated, four years before current fiscal year	52,565		30,715
Financing receivable, originated, more than five years before current fiscal year	113,924		95,908
Revolving Loans Amortized Cost Basis	236,456		237,906
Total loans	719,655		715,425
Commercial | Commercial and industrial | Watch (7-8)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	500		680
Financing receivable, year two, originated, fiscal year before current fiscal year	773		4,539
Financing receivable, year three, originated, two years before current fiscal year	2,112		781
Financing receivable, year four, originated, three years before current fiscal year	3,710		1,690
Financing receivable, year five, originated, four years before current fiscal year	1,952		105
Financing receivable, originated, more than five years before current fiscal year	2,746		4,474
Revolving Loans Amortized Cost Basis	2,239		2,793
Total loans	14,032		15,062
Commercial | Commercial and industrial | Substandard Accrual (9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		971
Financing receivable, year three, originated, two years before current fiscal year	3,809		68
Financing receivable, year four, originated, three years before current fiscal year	65		388
Financing receivable, year five, originated, four years before current fiscal year	351		109
Financing receivable, originated, more than five years before current fiscal year	1,312		402
Revolving Loans Amortized Cost Basis	27		0
Total loans	5,564		1,938
Commercial | Commercial and industrial | Non-Accrual (10-11)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0
Financing receivable, year four, originated, three years before current fiscal year	0		0
Financing receivable, year five, originated, four years before current fiscal year	0		0
Financing receivable, originated, more than five years before current fiscal year	36		38
Revolving Loans Amortized Cost Basis	0		0
Total loans	36		38
Commercial | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	23,896		170,238
Financing receivable, year two, originated, fiscal year before current fiscal year	179,315		155,100
Financing receivable, year three, originated, two years before current fiscal year	156,164		38,375
Financing receivable, year four, originated, three years before current fiscal year	33,558		102,712
Financing receivable, year five, originated, four years before current fiscal year	91,404		59,604
Financing receivable, originated, more than five years before current fiscal year	210,745		166,219
Revolving Loans Amortized Cost Basis	36,924		42,142
Total loans	732,006		734,390
Accrued interest, current fiscal year	54		609
Accrued interest, fiscal year before current	498		468
Accrued interest, two years before current	491		88
Accrued interest, three years before current	98		368
Accrued interest, four years before current	358		206
Accrued interest, more than five years before current fiscal year	681		515
Accrued interest, revolving	146		109
Accrued interest excluded from total	2,326		2,363
Gross charge-offs, current fiscal year	0
Gross charge-offs, fiscal year before current	0
Gross charge-offs, two years before current	0
Gross charge-offs, three years before current	0
Gross charge-offs, four years before current	960
Gross charge-offs, more than five years before current	0
Gross charge-offs, revolving	0
Current period gross charge-offs	960
Commercial | Commercial real estate | Non-watch (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	23,896		170,238
Financing receivable, year two, originated, fiscal year before current fiscal year	179,315		154,918
Financing receivable, year three, originated, two years before current fiscal year	156,164		38,062
Financing receivable, year four, originated, three years before current fiscal year	33,558		97,762
Financing receivable, year five, originated, four years before current fiscal year	86,665		56,580
Financing receivable, originated, more than five years before current fiscal year	208,035		159,514
Revolving Loans Amortized Cost Basis	36,924		42,030
Total loans	724,557		719,104
Commercial | Commercial real estate | Watch (7-8)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		182
Financing receivable, year three, originated, two years before current fiscal year	0		313
Financing receivable, year four, originated, three years before current fiscal year	0		4,769
Financing receivable, year five, originated, four years before current fiscal year	4,558		1,010
Financing receivable, originated, more than five years before current fiscal year	2,683		1,641
Revolving Loans Amortized Cost Basis	0		112
Total loans	7,241		8,027
Commercial | Commercial real estate | Substandard Accrual (9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0
Financing receivable, year four, originated, three years before current fiscal year	0		181
Financing receivable, year five, originated, four years before current fiscal year	181		2,014
Financing receivable, originated, more than five years before current fiscal year	27		5,064
Revolving Loans Amortized Cost Basis	0		0
Total loans	208		7,259
Commercial | Commercial real estate | Non-Accrual (10-11)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0
Financing receivable, year four, originated, three years before current fiscal year	0		0
Financing receivable, year five, originated, four years before current fiscal year	0		0
Financing receivable, originated, more than five years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Total loans	$ 0		$ 0