Loans - Loan Ratings by Loan Class, Commercial (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 3,851,889		$ 3,851,889		$ 3,790,901
Accrued interest excluded from total	13,407		13,407		12,500
Current period gross charge-offs	890	$ 650	1,702	$ 2,281
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	113,791		113,791		313,144
Financing receivable, year two, originated, fiscal year before current fiscal year	360,278		360,278		327,184
Financing receivable, year three, originated, two years before current fiscal year	319,846		319,846		203,020
Financing receivable, year four, originated, three years before current fiscal year	181,634		181,634		79,908
Financing receivable, year five, originated, four years before current fiscal year	139,088		139,088		127,798
Financing receivable, originated, more than five years before current fiscal year	311,624		311,624		282,057
Revolving Loans Amortized Cost Basis	306,092		306,092		346,620
Total loans	1,732,353		1,732,353		1,679,731
Accrued interest, current fiscal year	409		409		787
Accrued interest, fiscal year before current	932		932		1,123
Accrued interest, two years before current	1,162		1,162		563
Accrued interest, three years before current	515		515		201
Accrued interest, four years before current	553		553		467
Accrued interest, more than five years before current fiscal year	1,109		1,109		987
Accrued interest, revolving	1,444		1,444		1,615
Accrued interest excluded from total	6,124		6,124		5,743
Gross charge-offs, current fiscal year			0		0
Gross charge-offs, fiscal year before current			0		0
Gross charge-offs, two years before current			0		0
Gross charge-offs, three years before current			0		0
Gross charge-offs, four years before current			0		960
Gross charge-offs, more than five years before current			0		69
Gross charge-offs, revolving			0		25
Current period gross charge-offs	0	$ 69	0	$ 1,029	1,054
Commercial | Non-watch (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	100,951		100,951		313,048
Financing receivable, year two, originated, fiscal year before current fiscal year	357,990		357,990		321,945
Financing receivable, year three, originated, two years before current fiscal year	316,573		316,573		201,509
Financing receivable, year four, originated, three years before current fiscal year	177,734		177,734		77,328
Financing receivable, year five, originated, four years before current fiscal year	135,697		135,697		121,282
Financing receivable, originated, more than five years before current fiscal year	304,239		304,239		274,225
Revolving Loans Amortized Cost Basis	292,512		292,512		334,486
Total loans	1,685,696		1,685,696		1,643,823
Commercial | Watch (7-8)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	10,220		10,220		96
Financing receivable, year two, originated, fiscal year before current fiscal year	2,288		2,288		5,239
Financing receivable, year three, originated, two years before current fiscal year	3,273		3,273		964
Financing receivable, year four, originated, three years before current fiscal year	2,884		2,884		2,580
Financing receivable, year five, originated, four years before current fiscal year	3,094		3,094		6,495
Financing receivable, originated, more than five years before current fiscal year	6,668		6,668		7,800
Revolving Loans Amortized Cost Basis	10,822		10,822		11,938
Total loans	39,249		39,249		35,112
Commercial | Substandard Accrual (9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	2,620		2,620		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0		547
Financing receivable, year four, originated, three years before current fiscal year	724		724		0
Financing receivable, year five, originated, four years before current fiscal year	297		297		21
Financing receivable, originated, more than five years before current fiscal year	697		697		4
Revolving Loans Amortized Cost Basis	2,758		2,758		196
Total loans	7,096		7,096		768
Commercial | Non-Accrual (10-11)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0		0
Financing receivable, year four, originated, three years before current fiscal year	292		292		0
Financing receivable, year five, originated, four years before current fiscal year	0		0		0
Financing receivable, originated, more than five years before current fiscal year	20		20		28
Revolving Loans Amortized Cost Basis	0		0		0
Total loans	312		312		28
Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	83,010		83,010		110,568
Financing receivable, year two, originated, fiscal year before current fiscal year	126,742		126,742		157,954
Financing receivable, year three, originated, two years before current fiscal year	143,197		143,197		71,592
Financing receivable, year four, originated, three years before current fiscal year	80,015		80,015		50,224
Financing receivable, year five, originated, four years before current fiscal year	87,960		87,960		46,770
Financing receivable, originated, more than five years before current fiscal year	117,015		117,015		100,269
Revolving Loans Amortized Cost Basis	242,788		242,788		272,768
Total loans	880,727		880,727		810,145
Accrued interest, current fiscal year	282		282		239
Accrued interest, fiscal year before current	337		337		438
Accrued interest, two years before current	441		441		132
Accrued interest, three years before current	214		214		128
Accrued interest, four years before current	384		384		120
Accrued interest, more than five years before current fiscal year	407		407		326
Accrued interest, revolving	1,132		1,132		1,327
Accrued interest excluded from total	3,197		3,197		2,710
Gross charge-offs, current fiscal year			0		0
Gross charge-offs, fiscal year before current			0		0
Gross charge-offs, two years before current			0		0
Gross charge-offs, three years before current			0		0
Gross charge-offs, four years before current			0		0
Gross charge-offs, more than five years before current			0		69
Gross charge-offs, revolving			0		25
Current period gross charge-offs			0		94
Commercial | Commercial and industrial | Non-watch (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	70,170		70,170		110,472
Financing receivable, year two, originated, fiscal year before current fiscal year	124,454		124,454		152,715
Financing receivable, year three, originated, two years before current fiscal year	139,924		139,924		70,081
Financing receivable, year four, originated, three years before current fiscal year	76,254		76,254		47,644
Financing receivable, year five, originated, four years before current fiscal year	84,569		84,569		42,576
Financing receivable, originated, more than five years before current fiscal year	115,651		115,651		97,960
Revolving Loans Amortized Cost Basis	237,880		237,880		260,634
Total loans	848,902		848,902		782,082
Commercial | Commercial and industrial | Watch (7-8)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	10,220		10,220		96
Financing receivable, year two, originated, fiscal year before current fiscal year	2,288		2,288		5,239
Financing receivable, year three, originated, two years before current fiscal year	3,273		3,273		964
Financing receivable, year four, originated, three years before current fiscal year	2,884		2,884		2,580
Financing receivable, year five, originated, four years before current fiscal year	3,094		3,094		4,173
Financing receivable, originated, more than five years before current fiscal year	1,344		1,344		2,277
Revolving Loans Amortized Cost Basis	2,150		2,150		11,938
Total loans	25,253		25,253		27,267
Commercial | Commercial and industrial | Substandard Accrual (9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	2,620		2,620		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0		547
Financing receivable, year four, originated, three years before current fiscal year	585		585		0
Financing receivable, year five, originated, four years before current fiscal year	297		297		21
Financing receivable, originated, more than five years before current fiscal year	0		0		4
Revolving Loans Amortized Cost Basis	2,758		2,758		196
Total loans	6,260		6,260		768
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		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0		0
Financing receivable, year four, originated, three years before current fiscal year	292		292		0
Financing receivable, year five, originated, four years before current fiscal year	0		0		0
Financing receivable, originated, more than five years before current fiscal year	20		20		28
Revolving Loans Amortized Cost Basis	0		0		0
Total loans	312		312		28
Commercial | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	30,781		30,781		202,576
Financing receivable, year two, originated, fiscal year before current fiscal year	233,536		233,536		169,230
Financing receivable, year three, originated, two years before current fiscal year	176,649		176,649		131,428
Financing receivable, year four, originated, three years before current fiscal year	101,619		101,619		29,684
Financing receivable, year five, originated, four years before current fiscal year	51,128		51,128		81,028
Financing receivable, originated, more than five years before current fiscal year	194,609		194,609		181,788
Revolving Loans Amortized Cost Basis	63,304		63,304		73,852
Total loans	851,626		851,626		869,586
Accrued interest, current fiscal year	127		127		548
Accrued interest, fiscal year before current	595		595		685
Accrued interest, two years before current	721		721		431
Accrued interest, three years before current	301		301		73
Accrued interest, four years before current	169		169		347
Accrued interest, more than five years before current fiscal year	702		702		661
Accrued interest, revolving	312		312		288
Accrued interest excluded from total	2,927		2,927		3,033
Gross charge-offs, current fiscal year			0		0
Gross charge-offs, fiscal year before current			0		0
Gross charge-offs, two years before current			0		0
Gross charge-offs, three years before current			0		0
Gross charge-offs, four years before current			0		960
Gross charge-offs, more than five years before current			0		0
Gross charge-offs, revolving			0		0
Current period gross charge-offs			0		960
Commercial | Commercial real estate | Non-watch (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	30,781		30,781		202,576
Financing receivable, year two, originated, fiscal year before current fiscal year	233,536		233,536		169,230
Financing receivable, year three, originated, two years before current fiscal year	176,649		176,649		131,428
Financing receivable, year four, originated, three years before current fiscal year	101,480		101,480		29,684
Financing receivable, year five, originated, four years before current fiscal year	51,128		51,128		78,706
Financing receivable, originated, more than five years before current fiscal year	188,588		188,588		176,265
Revolving Loans Amortized Cost Basis	54,632		54,632		73,852
Total loans	836,794		836,794		861,741
Commercial | Commercial real estate | Watch (7-8)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0		0
Financing receivable, year four, originated, three years before current fiscal year	0		0		0
Financing receivable, year five, originated, four years before current fiscal year	0		0		2,322
Financing receivable, originated, more than five years before current fiscal year	5,324		5,324		5,523
Revolving Loans Amortized Cost Basis	8,672		8,672		0
Total loans	13,996		13,996		7,845
Commercial | Commercial real estate | Substandard Accrual (9)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, year one, originated, current fiscal year	0		0		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0		0
Financing receivable, year four, originated, three years before current fiscal year	139		139		0
Financing receivable, year five, originated, four years before current fiscal year	0		0		0
Financing receivable, originated, more than five years before current fiscal year	697		697		0
Revolving Loans Amortized Cost Basis	0		0		0
Total loans	836		836		0
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		0
Financing receivable, year two, originated, fiscal year before current fiscal year	0		0		0
Financing receivable, year three, originated, two years before current fiscal year	0		0		0
Financing receivable, year four, originated, three years before current fiscal year	0		0		0
Financing receivable, year five, originated, four years before current fiscal year	0		0		0
Financing receivable, originated, more than five years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Total loans	$ 0		$ 0		$ 0