Loans - Residential, Home Equity and Consumer Loans Based on Payment Activity (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	$ 4,044,268		$ 4,044,268		$ 3,977,900
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	599	$ 849	1,660	$ 2,087
Consumer Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	22,001		22,001		49,282
Year two	33,596		33,596		21,480
Year three	13,170		13,170		9,720
Year four	7,082		7,082		2,756
Year five	1,843		1,843		917
Prior	2,036		2,036		1,912
Revolving Loans Amortized Cost Basis	1,443		1,443		1,786
Total	81,171		81,171		87,853
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one			561		1,162
Year two			104		42
Year three			48		23
Year four			37		71
Year five			0		3
Prior			0		1
Revolving Loans Amortized Cost Basis			3		7
Total	384	284	753	628	1,309
Consumer Loans | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	22,001		22,001		49,208
Year two	33,595		33,595		21,459
Year three	13,157		13,157		9,708
Year four	7,082		7,082		2,756
Year five	1,843		1,843		917
Prior	2,035		2,035		1,911
Revolving Loans Amortized Cost Basis	1,443		1,443		1,783
Total	81,156		81,156		87,742
Consumer Loans | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		74
Year two	1		1		21
Year three	13		13		12
Year four	0		0		0
Year five	0		0		0
Prior	1		1		1
Revolving Loans Amortized Cost Basis	0		0		3
Total	15		15		111
Home Equity Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	285		285		417
Year three	2,872		2,872		488
Year four	371		371		150
Year five	292		292		165
Prior	3,646		3,646		1,309
Revolving Loans Amortized Cost Basis	314,577		314,577		297,156
Total	322,043		322,043		299,685
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one			0		0
Year two			0		0
Year three			35		0
Year four			99		55
Year five			0		0
Prior			0		24
Revolving Loans Amortized Cost Basis			0		15
Total	0	25	134	39	94
Home Equity Loans | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	258		258		170
Year three	2,660		2,660		236
Year four	371		371		90
Year five	292		292		165
Prior	3,456		3,456		1,207
Revolving Loans Amortized Cost Basis	314,568		314,568		296,784
Total	321,605		321,605		298,652
Home Equity Loans | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	27		27		247
Year three	212		212		252
Year four	0		0		60
Year five	0		0		0
Prior	190		190		102
Revolving Loans Amortized Cost Basis	9		9		372
Total	438		438		1,033
Residential Mortgage Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	32,721		32,721		56,317
Year two	54,170		54,170		65,361
Year three	62,206		62,206		86,170
Year four	80,022		80,022		41,639
Year five	38,731		38,731		17,940
Prior	101,147		101,147		95,417
Revolving Loans Amortized Cost Basis	0		0		0
Total	368,997		368,997		362,844
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one			0		0
Year two			0		0
Year three			0		22
Year four			0		36
Year five			0		0
Prior			0		0
Revolving Loans Amortized Cost Basis			0		0
Total	0	$ 31	0	$ 57	58
Residential Mortgage Loans | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	32,721		32,721		56,306
Year two	54,021		54,021		65,301
Year three	62,033		62,033		85,753
Year four	79,924		79,924		41,352
Year five	38,589		38,589		17,831
Prior	100,861		100,861		94,926
Revolving Loans Amortized Cost Basis	0		0		0
Total	368,149		368,149		361,469
Residential Mortgage Loans | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		11
Year two	149		149		60
Year three	173		173		417
Year four	98		98		287
Year five	142		142		109
Prior	286		286		491
Revolving Loans Amortized Cost Basis	0		0		0
Total	$ 848		$ 848		$ 1,375