Loans - Summary of Amortized Cost Basis of Loans by Credit Quality Indicator and Class of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023		Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Total	$ 6,708,568	[1]	$ 6,460,620	[2]
Residential Real Estate [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	72,605		265,164
Year 1	438,159		476,640
Year 2	448,451		337,776
Year 3	324,910		94,500
Year 4	91,362		52,307
Prior	328,421		299,561
Revolving Loans	2,129		3,019
Total	1,706,037		1,528,967
Commercial Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	125,525		582,660
Year 1	602,231		512,104
Year 2	533,836		518,317
Year 3	513,328		329,415
Year 4	319,667		224,090
Prior	738,728		581,637
Revolving Loans	17,742		16,392
Total	2,851,057		2,764,615
Construction Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	46,056		348,570
Year 1	343,257		182,755
Year 2	142,495		53,161
Year 3	41,942		20,994
Year 4	10,286
Total	584,036		605,480
Commercial [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	89,349		268,408
Year 1	261,178		212,876
Year 2	190,838		97,824
Year 3	76,245		51,424
Year 4	43,370		25,069
Prior	40,914		28,084
Revolving Loans	361,810		366,389
Total	1,063,704		1,050,074
Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	10,650		30,053
Year 1	27,587		21,130
Year 2	19,971		5,387
Year 3	4,841		3,620
Year 4	3,283		1,881
Prior	29,483		31,011
Revolving Loans	174,907		182,122
Total	270,722		275,204
Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	31,040		133,870
Year 1	114,913		33,592
Year 2	28,060		17,887
Year 3	14,636		13,997
Year 4	10,455		4,084
Prior	3,606		2,563
Revolving Loans	9,833		9,456
Total	212,543		215,449
PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Year 3			133
Year 4	121		391
Prior	16,375		17,106
Revolving Loans	3,973		3,201
Total	20,469		20,831
Current-period gross charge-offs | Residential Real Estate [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Year 2	217
Prior	66
Total	283
Current-period gross charge-offs | Commercial Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Prior	20
Total	20
Current-period gross charge-offs | Commercial [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Revolving Loans	2
Total	2
Current-period gross charge-offs | Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Prior	22
Revolving Loans	99
Total	121
Current-period gross charge-offs | Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Year 1	85
Year 2	56
Year 3	63
Year 4	9
Prior	8
Revolving Loans	50
Total	271
Current-period gross charge-offs | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Prior	46
Revolving Loans	1
Total	47
Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total	6,587,378	[1]	6,340,949	[2]
Unclassified [Member] | Residential Real Estate [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	72,488
Year 1	436,861
Year 2	446,915
Year 3	323,345
Year 4	90,711
Prior	322,786
Revolving Loans	2,129
Total	1,695,235
Unclassified [Member] | Commercial Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	125,474
Year 1	600,502
Year 2	529,545
Year 3	508,611
Year 4	314,839
Prior	705,271
Revolving Loans	17,468
Total	2,801,710
Unclassified [Member] | Construction Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	46,056
Year 1	343,257
Year 2	142,495
Year 3	41,942
Year 4	1,953
Total	575,703
Unclassified [Member] | Commercial [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	84,763
Year 1	259,149
Year 2	178,867
Year 3	71,140
Year 4	42,385
Prior	34,794
Revolving Loans	350,265
Total	1,021,363
Unclassified [Member] | Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	10,650
Year 1	27,538
Year 2	19,957
Year 3	4,841
Year 4	3,255
Prior	29,125
Revolving Loans	173,672
Total	269,038
Unclassified [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	31,040
Year 1	113,854
Year 2	27,648
Year 3	14,231
Year 4	10,204
Prior	3,538
Revolving Loans	9,833
Total	210,348
Unclassified [Member] | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Year 4	121
Prior	13,220
Revolving Loans	640
Total	13,981
Pass [Member] | Residential Real Estate [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			264,884
Year 1			474,992
Year 2			335,982
Year 3			93,548
Year 4			51,710
Prior			296,089
Revolving Loans			2,452
Total			1,519,657
Pass [Member] | Commercial Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			582,384
Year 1			506,386
Year 2			517,790
Year 3			324,210
Year 4			194,240
Prior			557,728
Revolving Loans			15,554
Total			2,698,292
Pass [Member] | Construction Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			348,570
Year 1			182,755
Year 2			53,161
Year 3			20,994
Total			605,480
Pass [Member] | Commercial [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			266,501
Year 1			208,663
Year 2			90,014
Year 3			49,887
Year 4			23,719
Prior			22,515
Revolving Loans			355,626
Total			1,016,925
Pass [Member] | Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			30,009
Year 1			21,116
Year 2			5,387
Year 3			3,592
Year 4			1,849
Prior			30,509
Revolving Loans			181,151
Total			273,613
Pass [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			133,194
Year 1			33,109
Year 2			17,219
Year 3			13,681
Year 4			4,022
Prior			2,529
Revolving Loans			9,324
Total			213,078
Pass [Member] | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Year 3			131
Year 4			369
Prior			13,117
Revolving Loans			287
Total			13,904
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total	60,730	[1]	75,873	[2]
Special Mention [Member] | Residential Real Estate [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Year 2			180
Year 3	175		30
Year 4			80
Prior	309		78
Revolving Loans			567
Total	484		935
Special Mention [Member] | Commercial Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			161
Year 1	1,459		3,614
Year 2	4,096		0
Year 3	2,012		593
Year 4			25,395
Prior	13,042		15,561
Revolving Loans	142		705
Total	20,751		46,029
Special Mention [Member] | Construction Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Year 4	8,333
Total	8,333
Special Mention [Member] | Commercial [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	4,586		1,891
Year 1	1,215		4,094
Year 2	7,891		3,913
Year 3	290		1,533
Year 4	511		1,160
Prior	4,080		5,365
Revolving Loans	8,803		8,363
Total	27,376		26,319
Special Mention [Member] | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Year 3			0
Prior	795		292
Revolving Loans	2,991		2,298
Total	3,786		2,590
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total	60,460	[1]	43,798	[2]
Substandard [Member] | Residential Real Estate [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	117		280
Year 1	1,298		1,648
Year 2	1,536		1,614
Year 3	1,390		922
Year 4	651		517
Prior	5,326		3,394
Total	10,318		8,375
Substandard [Member] | Commercial Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current year	51		115
Year 1	270		2,104
Year 2	195		527
Year 3	2,705		4,612
Year 4	4,828		4,455
Prior	20,415		8,348
Revolving Loans	132		133
Total	28,596		20,294
Substandard [Member] | Commercial [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			16
Year 1	814		119
Year 2	4,080		3,897
Year 3	4,815		4
Year 4	474		190
Prior	2,040		204
Revolving Loans	2,742		2,400
Total	14,965		6,830
Substandard [Member] | Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			44
Year 1	49		14
Year 2	14
Year 3			28
Year 4	28		32
Prior	358		502
Revolving Loans	1,235		971
Total	1,684		1,591
Substandard [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current year			676
Year 1	1,059		483
Year 2	412		668
Year 3	405		316
Year 4	251		62
Prior	68		34
Revolving Loans			132
Total	2,195		2,371
Substandard [Member] | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Year 3			2
Year 4			22
Prior	2,360		3,697
Revolving Loans	342		616
Total	$ 2,702		$ 4,337

[1] (1) Total loans are net of undisbursed funds and deferred fees and costs.

[2] (1) Total loans are net undisbursed loan funds and deferred fees and costs