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Allowance for Credit Losses - Credit Quality Indicators by Commercial and Industrial Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 5,605,935	$ 5,268,911
Commercial and industrial | Other Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	131,908	124,190
One year before current fiscal year	92,577	80,099
Two years before current fiscal year	68,330	39,021
Three years before current fiscal year	28,808	41,711
Four years before current fiscal year	33,715	34,242
Prior	145,878	157,921
Revolving Loans Amortized Cost Basis	215,611	222,050
Revolving Loans Converted to Term	5,063	6,466
Total Loans	721,890	705,700
Current-period gross writeoffs
2023	6
2022	0
2021	0
2020	0
2019	0
Prior	29
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	35
Commercial and industrial | Other Financing Receivable | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	130,993	124,190
One year before current fiscal year	92,335	79,861
Two years before current fiscal year	68,030	38,158
Three years before current fiscal year	28,237	41,391
Four years before current fiscal year	33,618	33,238
Prior	141,758	156,038
Revolving Loans Amortized Cost Basis	212,349	215,890
Revolving Loans Converted to Term	5,063	6,466
Total Loans	712,383	695,232
Commercial and industrial | Other Financing Receivable | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	915	0
One year before current fiscal year	196	127
Two years before current fiscal year	222	421
Three years before current fiscal year	242	285
Four years before current fiscal year	79	271
Prior	1,287	1,380
Revolving Loans Amortized Cost Basis	682	501
Revolving Loans Converted to Term	0	0
Total Loans	3,623	2,985
Commercial and industrial | Other Financing Receivable | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	46	111
Two years before current fiscal year	78	442
Three years before current fiscal year	329	35
Four years before current fiscal year	18	733
Prior	2,833	503
Revolving Loans Amortized Cost Basis	2,580	5,659
Revolving Loans Converted to Term	0	0
Total Loans	5,884	7,483
Commercial and industrial | PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	16,694
One year before current fiscal year	0	4,178
Two years before current fiscal year	264	5,015
Three years before current fiscal year	140	4,186
Four years before current fiscal year	0	7,734
Prior	0	4,899
Revolving Loans Amortized Cost Basis	0	42,152
Revolving Loans Converted to Term	0	215
Total Loans	404	85,073
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	0
Commercial and industrial | PPP loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	16,694
One year before current fiscal year	0	4,120
Two years before current fiscal year	264	4,944
Three years before current fiscal year	140	4,186
Four years before current fiscal year	0	7,734
Prior	0	4,883
Revolving Loans Amortized Cost Basis	0	42,097
Revolving Loans Converted to Term	0	215
Total Loans	404	84,873
Commercial and industrial | PPP loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	58
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	50
Revolving Loans Converted to Term	0	0
Total Loans	0	108
Commercial and industrial | PPP loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	71
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	16
Revolving Loans Amortized Cost Basis	0	5
Revolving Loans Converted to Term	0	0
Total Loans	0	92
Commercial and industrial | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	24,924	0
One year before current fiscal year	11,935	416
Two years before current fiscal year	3,388	340
Three years before current fiscal year	3,170	0
Four years before current fiscal year	3,268	0
Prior	16,767	0
Revolving Loans Amortized Cost Basis	36,729	0
Revolving Loans Converted to Term	1,030	0
Total Loans	101,211	756
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	0
Commercial and industrial | Agriculture | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	24,924	0
One year before current fiscal year	11,935	416
Two years before current fiscal year	3,341	340
Three years before current fiscal year	3,114	0
Four years before current fiscal year	3,268	0
Prior	16,759	0
Revolving Loans Amortized Cost Basis	36,728	0
Revolving Loans Converted to Term	1,030	0
Total Loans	101,099	756
Commercial and industrial | Agriculture | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	47	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	47	0
Commercial and industrial | Agriculture | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	56	0
Four years before current fiscal year	0	0
Prior	8	0
Revolving Loans Amortized Cost Basis	1	0
Revolving Loans Converted to Term	0	0
Total Loans	65	0
Commercial real estate | Other Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	246,016	343,032
One year before current fiscal year	333,515	370,620
Two years before current fiscal year	368,103	313,295
Three years before current fiscal year	310,093	294,443
Four years before current fiscal year	286,203	207,263
Prior	983,010	873,145
Revolving Loans Amortized Cost Basis	35,702	11,038
Revolving Loans Converted to Term	24,949	24,503
Total Loans	2,587,591	2,437,339
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	0
Commercial real estate | Other Financing Receivable | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	246,016	342,311
One year before current fiscal year	317,583	367,104
Two years before current fiscal year	365,975	311,607
Three years before current fiscal year	292,960	279,587
Four years before current fiscal year	272,722	203,016
Prior	921,201	812,563
Revolving Loans Amortized Cost Basis	34,346	10,906
Revolving Loans Converted to Term	24,949	24,503
Total Loans	2,475,752	2,351,597
Commercial real estate | Other Financing Receivable | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	643
One year before current fiscal year	632	3,406
Two years before current fiscal year	0	1,688
Three years before current fiscal year	17,133	11,462
Four years before current fiscal year	11,422	2,555
Prior	16,100	25,361
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	45,287	45,115
Commercial real estate | Other Financing Receivable | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	78
One year before current fiscal year	15,300	110
Two years before current fiscal year	2,128	0
Three years before current fiscal year	0	3,394
Four years before current fiscal year	2,059	1,692
Prior	45,709	35,221
Revolving Loans Amortized Cost Basis	1,356	132
Revolving Loans Converted to Term	0	0
Total Loans	66,552	40,627
Commercial real estate | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	14,668	33,241
One year before current fiscal year	37,256	24,125
Two years before current fiscal year	22,813	22,831
Three years before current fiscal year	21,001	26,163
Four years before current fiscal year	24,342	37,873
Prior	94,969	66,364
Revolving Loans Amortized Cost Basis	257	3,131
Revolving Loans Converted to Term	6,364	1,235
Total Loans	221,670	214,963
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	0
Commercial real estate | Agriculture | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	14,668	33,241
One year before current fiscal year	37,256	24,125
Two years before current fiscal year	22,813	22,831
Three years before current fiscal year	21,001	25,576
Four years before current fiscal year	23,794	37,835
Prior	93,890	65,112
Revolving Loans Amortized Cost Basis	257	3,131
Revolving Loans Converted to Term	6,364	1,235
Total Loans	220,043	213,086
Commercial real estate | Agriculture | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	401
Four years before current fiscal year	378	0
Prior	1,033	1,142
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	1,411	1,543
Commercial real estate | Agriculture | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	186
Four years before current fiscal year	170	38
Prior	46	110
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	216	334
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	9,265	23,105
One year before current fiscal year	2,793	75,245
Two years before current fiscal year	8,068	27,584
Three years before current fiscal year	2,501	14,842
Four years before current fiscal year	357	9,083
Prior	596	7,268
Revolving Loans Amortized Cost Basis	274,224	42,701
Revolving Loans Converted to Term	5,602	1,288
Total Loans	303,406	201,116
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	0
Commercial real estate | Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	9,265	23,105
One year before current fiscal year	2,793	75,245
Two years before current fiscal year	8,068	27,584
Three years before current fiscal year	2,501	14,842
Four years before current fiscal year	357	9,083
Prior	596	7,268
Revolving Loans Amortized Cost Basis	274,224	42,701
Revolving Loans Converted to Term	5,602	1,288
Total Loans	303,406	201,116
Commercial real estate | Construction | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	0	0
Commercial real estate | Construction | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	0	0
Residential | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	2,378	3,030
One year before current fiscal year	2,237	1,062
Two years before current fiscal year	890	637
Three years before current fiscal year	529	1,006
Four years before current fiscal year	832	792
Prior	8,515	3,208
Revolving Loans Amortized Cost Basis	167,098	177,803
Revolving Loans Converted to Term	5,837	1,085
Total Loans	188,316	188,623
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	20
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	20
Residential | Home equity | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	2,378	3,030
One year before current fiscal year	2,237	1,062
Two years before current fiscal year	890	637
Three years before current fiscal year	529	992
Four years before current fiscal year	832	792
Prior	8,178	3,183
Revolving Loans Amortized Cost Basis	164,205	175,451
Revolving Loans Converted to Term	5,837	1,085
Total Loans	185,086	186,232
Residential | Home equity | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	14
Four years before current fiscal year	0	0
Prior	337	25
Revolving Loans Amortized Cost Basis	2,893	2,352
Revolving Loans Converted to Term	0	0
Total Loans	3,230	2,391
Residential | Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	131,004	187,347
One year before current fiscal year	186,794	272,570
Two years before current fiscal year	256,456	240,212
Three years before current fiscal year	222,931	118,073
Four years before current fiscal year	110,477	68,157
Prior	465,613	459,959
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	1,373,275	1,346,318
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	0
Residential | Mortgages | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	131,004	187,129
One year before current fiscal year	186,401	272,235
Two years before current fiscal year	256,127	239,584
Three years before current fiscal year	221,945	117,391
Four years before current fiscal year	109,594	66,605
Prior	456,167	452,221
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	1,361,238	1,335,165
Residential | Mortgages | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	218
One year before current fiscal year	393	335
Two years before current fiscal year	329	628
Three years before current fiscal year	986	682
Four years before current fiscal year	883	1,552
Prior	9,446	7,738
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	12,037	11,153
Consumer and Other | Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	50,297	31,243
One year before current fiscal year	13,327	13,999
Two years before current fiscal year	11,316	7,375
Three years before current fiscal year	5,157	6,231
Four years before current fiscal year	4,107	4,462
Prior	10,014	8,029
Revolving Loans Amortized Cost Basis	2,724	4,073
Revolving Loans Converted to Term	0	0
Total Loans	96,942	75,412
Current-period gross writeoffs
2023	801
2022	29
2021	16
2020	21
2019	83
Prior	28
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	978
Consumer and Other | Direct | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	50,295	31,243
One year before current fiscal year	13,327	13,999
Two years before current fiscal year	11,316	7,372
Three years before current fiscal year	5,157	6,138
Four years before current fiscal year	4,037	4,386
Prior	9,857	8,029
Revolving Loans Amortized Cost Basis	2,723	4,070
Revolving Loans Converted to Term	0	0
Total Loans	96,712	75,237
Consumer and Other | Direct | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	2	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	3
Three years before current fiscal year	0	93
Four years before current fiscal year	70	76
Prior	157	0
Revolving Loans Amortized Cost Basis	1	3
Revolving Loans Converted to Term	0	0
Total Loans	230	175
Consumer and Other | Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	156
Two years before current fiscal year	97	146
Three years before current fiscal year	68	1,168
Four years before current fiscal year	432	645
Prior	244	109
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	841	2,224
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	53
Prior	14
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	67
Consumer and Other | Indirect | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	156
Two years before current fiscal year	97	146
Three years before current fiscal year	68	1,092
Four years before current fiscal year	402	635
Prior	234	101
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	801	2,130
Consumer and Other | Indirect | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	76
Four years before current fiscal year	30	10
Prior	10	8
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total Loans	$ 40	$ 94

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