Loans - Residential, Home Equity and Consumer Loans Based on Payment Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 3,893,573		$ 3,893,573		$ 3,788,645
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	650	$ 820	2,737	$ 1,636
Consumer Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	40,112		40,112		42,688
2022-2021	28,353		28,353		22,727
2021-2020	10,863		10,863		5,822
2020-2019	3,716		3,716		2,402
2019-2018	1,139		1,139		1,545
Prior	2,126		2,126		1,563
Revolving Loans Amortized Cost Basis	2,667		2,667		3,157
Total	88,976		88,976		79,904
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023			880
2022			42
2021			23
2020			24
2019			3
Prior			1
Revolving Loans Amortized Cost Basis			7
Total	352	495	980	1,027
Consumer Loans | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	40,108		40,108		42,685
2022-2021	28,347		28,347		22,708
2021-2020	10,852		10,852		5,610
2020-2019	3,710		3,710		2,394
2019-2018	1,139		1,139		1,543
Prior	2,121		2,121		1,553
Revolving Loans Amortized Cost Basis	2,667		2,667		3,157
Total	88,944		88,944		79,650
Consumer Loans | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	4		4		3
2022-2021	6		6		19
2021-2020	11		11		212
2020-2019	6		6		8
2019-2018	0		0		2
Prior	5		5		10
Revolving Loans Amortized Cost Basis	0		0		0
Total	32		32		254
Home Equity Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	225		225		63
2022-2021	118		118		20
2021-2020	338		338		0
2020-2019	90		90		0
2019-2018	68		68		19
Prior	1,106		1,106		592
Revolving Loans Amortized Cost Basis	284,935		284,935		279,054
Total	286,880		286,880		279,748
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023			0
2022			0
2021			0
2020			0
2019			0
Prior			24
Revolving Loans Amortized Cost Basis			15
Total	0	5	39	57
Home Equity Loans | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	225		225		63
2022-2021	118		118		0
2021-2020	87		87		0
2020-2019	90		90		0
2019-2018	68		68		0
Prior	1,014		1,014		591
Revolving Loans Amortized Cost Basis	284,657		284,657		278,784
Total	286,259		286,259		279,438
Home Equity Loans | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0		0
2022-2021	0		0		20
2021-2020	251		251		0
2020-2019	0		0		0
2019-2018	0		0		19
Prior	92		92		1
Revolving Loans Amortized Cost Basis	278		278		270
Total	621		621		310
Residential Mortgage Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	40,631		40,631		69,982
2022-2021	66,656		66,656		97,337
2021-2020	88,049		88,049		47,104
2020-2019	42,640		42,640		20,080
2019-2018	18,439		18,439		16,742
Prior	100,195		100,195		99,437
Revolving Loans Amortized Cost Basis	0		0		0
Total	356,610		356,610		350,682
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023			0
2022			0
2021			22
2020			36
2019			0
Prior			0
Revolving Loans Amortized Cost Basis			0
Total	1	18	58	21
Residential Mortgage Loans | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	40,631		40,631		69,982
2022-2021	66,546		66,546		97,176
2021-2020	87,909		87,909		46,851
2020-2019	42,517		42,517		20,080
2019-2018	18,330		18,330		16,664
Prior	99,610		99,610		98,699
Revolving Loans Amortized Cost Basis	0		0		0
Total	355,543		355,543		349,452
Residential Mortgage Loans | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0		0
2022-2021	110		110		161
2021-2020	140		140		253
2020-2019	123		123		0
2019-2018	109		109		78
Prior	585		585		738
Revolving Loans Amortized Cost Basis	0		0		0
Total	1,067		1,067		1,230
Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	88,427		88,427		158,088
2022-2021	141,517		141,517		123,425
2021-2020	92,978		92,978		41,375
2020-2019	33,096		33,096		47,887
2019-2018	38,414		38,414		20,002
Prior	54,780		54,780		56,065
Revolving Loans Amortized Cost Basis	149,681		149,681		173,264
Total	598,893		598,893		$ 620,106
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023			0
2022			911
2021			32
2020			33
2019			7
Prior			88
Revolving Loans Amortized Cost Basis			181
Total	$ 175	$ 238	$ 1,252	$ 299