Loans - Financing Receivable Credit Exposures by Internally Assigned Grades, by Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Loans [Abstract]
Total Loans	$ 2,298,222		$ 2,350,622
Gross charge-offs	78	$ 185
Commercial Real Estate [Member]
Loans [Abstract]
2026/2025	59,237		127,490
2025/2024	120,276		64,802
2024/2023	64,111		130,807
2023/2022	114,607		360,060
2022/2021	371,763		184,411
Prior	481,818		311,217
Revolving Loans Amortized Cost Basis	36,194		37,756
Revolving Loans Converted to Term	1,894		1,971
Total Loans	1,249,900		1,218,514
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		40
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0		40
Commercial Real Estate [Member] | Pass [Member]
Loans [Abstract]
2026/2025	59,237		127,490
2025/2024	120,276		59,760
2024/2023	59,068		128,989
2023/2022	112,794		329,694
2022/2021	340,943		172,617
Prior	452,669		294,237
Revolving Loans Amortized Cost Basis	33,851		34,709
Revolving Loans Converted to Term	1,894		1,971
Total Loans	1,180,732		1,149,467
Commercial Real Estate [Member] | Special Mention [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		5,042
2024/2023	0		797
2023/2022	792		5,784
2022/2021	9,382		8,770
Prior	14,633		7,208
Revolving Loans Amortized Cost Basis	0		733
Revolving Loans Converted to Term	0		0
Total Loans	24,807		28,334
Commercial Real Estate [Member] | Substandard [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	5,043		1,021
2023/2022	1,021		24,582
2022/2021	21,438		3,024
Prior	14,516		9,772
Revolving Loans Amortized Cost Basis	2,343		2,314
Revolving Loans Converted to Term	0		0
Total Loans	44,361		40,713
Commercial Real Estate [Member] | Doubtful [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	0		0
Agricultural Real Estate Loans [Member]
Loans [Abstract]
2026/2025	9,641		55,630
2025/2024	55,240		31,355
2024/2023	30,559		22,086
2023/2022	21,657		50,690
2022/2021	48,344		23,135
Prior	158,818		143,420
Revolving Loans Amortized Cost Basis	20,474		20,926
Revolving Loans Converted to Term	205		206
Total Loans	344,938		347,448
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0		0
Agricultural Real Estate Loans [Member] | Pass [Member]
Loans [Abstract]
2026/2025	9,641		54,278
2025/2024	54,397		30,648
2024/2023	29,878		18,810
2023/2022	18,406		47,254
2022/2021	44,942		20,747
Prior	152,503		139,424
Revolving Loans Amortized Cost Basis	18,531		18,558
Revolving Loans Converted to Term	131		131
Total Loans	328,429		329,850
Agricultural Real Estate Loans [Member] | Special Mention [Member]
Loans [Abstract]
2026/2025	0		55
2025/2024	45		40
2024/2023	37		3,276
2023/2022	3,251		1,384
2022/2021	1,352		1,731
Prior	3,646		1,893
Revolving Loans Amortized Cost Basis	1,298		1,723
Revolving Loans Converted to Term	0		0
Total Loans	9,629		10,102
Agricultural Real Estate Loans [Member] | Substandard [Member]
Loans [Abstract]
2026/2025	0		1,297
2025/2024	798		667
2024/2023	644		0
2023/2022	0		2,052
2022/2021	2,050		657
Prior	2,669		2,103
Revolving Loans Amortized Cost Basis	645		645
Revolving Loans Converted to Term	74		75
Total Loans	6,880		7,496
Agricultural Real Estate Loans [Member] | Doubtful [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	0		0
Construction [Member]
Loans [Abstract]
2026/2025	12,021		30,394
2025/2024	29,501		15,456
2024/2023	15,620		9,279
2023/2022	6,765		30,395
2022/2021	10,763		3,226
Prior	3,214		0
Revolving Loans Amortized Cost Basis	5,333		5,215
Revolving Loans Converted to Term	0		0
Total Loans	83,217		93,965
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0		0
Construction [Member] | Pass [Member]
Loans [Abstract]
2026/2025	12,021		30,394
2025/2024	29,501		15,456
2024/2023	15,620		8,490
2023/2022	5,976		25,772
2022/2021	6,166		0
Prior	0		0
Revolving Loans Amortized Cost Basis	5,333		5,215
Revolving Loans Converted to Term	0		0
Total Loans	74,617		85,327
Construction [Member] | Special Mention [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		206
2022/2021	204		2,943
Prior	2,939		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	3,143		3,149
Construction [Member] | Substandard [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		789
2023/2022	789		4,417
2022/2021	4,393		283
Prior	275		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	5,457		5,489
Construction [Member] | Doubtful [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	0		0
Residential Real Estate [Member]
Loans [Abstract]
2026/2025	1,509		13,909
2025/2024	14,110		13,209
2024/2023	13,060		23,135
2023/2022	21,342		82,296
2022/2021	81,619		42,974
Prior	152,346		113,141
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	283,986		288,664
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0		0
Residential Real Estate [Member] | Performing [Member]
Loans [Abstract]
2026/2025	1,509		13,909
2025/2024	14,110		13,209
2024/2023	13,060		23,135
2023/2022	21,342		81,239
2022/2021	80,576		41,842
Prior	150,124		111,948
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	280,721		285,282
Residential Real Estate [Member] | Nonperforming [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		1,057
2022/2021	1,043		1,132
Prior	2,222		1,193
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	3,265		3,382
Home Equity [Member]
Loans [Abstract]
2026/2025	146		2,917
2025/2024	2,495		2,528
2024/2023	2,300		2,551
2023/2022	2,453		1,727
2022/2021	1,638		1,150
Prior	8,063		7,028
Revolving Loans Amortized Cost Basis	34,699		34,121
Revolving Loans Converted to Term	286		286
Total Loans	52,080		52,308
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0		0
Home Equity [Member] | Performing [Member]
Loans [Abstract]
2026/2025	146		2,854
2025/2024	2,435		2,528
2024/2023	2,300		2,533
2023/2022	2,415		1,727
2022/2021	1,638		1,150
Prior	7,526		6,918
Revolving Loans Amortized Cost Basis	34,699		34,101
Revolving Loans Converted to Term	286		286
Total Loans	51,445		52,097
Home Equity [Member] | Nonperforming [Member]
Loans [Abstract]
2026/2025	0		63
2025/2024	60		0
2024/2023	0		18
2023/2022	38		0
2022/2021	0		0
Prior	537		110
Revolving Loans Amortized Cost Basis	0		20
Revolving Loans Converted to Term	0		0
Total Loans	635		211
Consumer [Member]
Loans [Abstract]
2026/2025	432		1,934
2025/2024	1,817		1,060
2024/2023	968		373
2023/2022	291		354
2022/2021	314		423
Prior	3,559		3,341
Revolving Loans Amortized Cost Basis	12,211		80,725
Revolving Loans Converted to Term	0		0
Total Loans	19,592		88,210
2026/2025	0
2025/2024	0
2024/2023	0
2023/2022	0
2022/2021	1
Prior	4
Revolving Loans Amortized Cost Basis	8
Revolving Loans Converted to Term	0
Gross charge-offs	13
Consumer [Member] | Performing [Member]
Loans [Abstract]
2026/2025	432		1,934
2025/2024	1,817		1,050
2024/2023	957		373
2023/2022	288		354
2022/2021	314		412
Prior	2,638		2,577
Revolving Loans Amortized Cost Basis	12,211		80,725
Revolving Loans Converted to Term	0		0
Total Loans	18,657		87,425
Consumer [Member] | Nonperforming [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		10
2024/2023	11		0
2023/2022	3		0
2022/2021	0		11
Prior	921		764
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	935		785
Mortgage, Home Equity, and Consumer [Member]
Loans [Abstract]
2026/2025	2,087
2025/2024	18,422
2024/2023	16,328
2023/2022	24,086
2022/2021	83,571
Prior	163,968
Revolving Loans Amortized Cost Basis	46,910
Revolving Loans Converted to Term	286
Total Loans	355,658
Mortgage, Home Equity, and Consumer [Member] | Performing [Member]
Loans [Abstract]
2026/2025	2,087
2025/2024	18,362
2024/2023	16,317
2023/2022	24,045
2022/2021	82,528
Prior	160,287
Revolving Loans Amortized Cost Basis	46,910
Revolving Loans Converted to Term	286
Total Loans	350,822
Mortgage, Home Equity, and Consumer [Member] | Nonperforming [Member]
Loans [Abstract]
2026/2025	0
2025/2024	60
2024/2023	11
2023/2022	41
2022/2021	1,043
Prior	3,681
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total Loans	4,836
Other Commercial Loans [Member]
Loans [Abstract]
2026/2025	1,725		33,300
2025/2024	30,176		27,361
2024/2023	26,462		18,039
2023/2022	17,333		6,722
2022/2021	8,536		6,138
Prior	9,600		4,533
Revolving Loans Amortized Cost Basis	75,132		81,393
Revolving Loans Converted to Term	1,664		1,680
Total Loans	170,628		179,166
2026/2025	0		0
2025/2024	0		49
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	23		63
Revolving Loans Amortized Cost Basis	42		379
Revolving Loans Converted to Term	0		0
Gross charge-offs	65	123	491
Other Commercial Loans [Member] | Pass [Member]
Loans [Abstract]
2026/2025	1,725		33,300
2025/2024	30,176		27,244
2024/2023	26,349		18,039
2023/2022	17,333		4,938
2022/2021	4,611		6,098
Prior	8,830		3,819
Revolving Loans Amortized Cost Basis	69,632		74,628
Revolving Loans Converted to Term	219		232
Total Loans	158,875		168,298
Other Commercial Loans [Member] | Special Mention [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	70		0
Revolving Loans Amortized Cost Basis	3,290		2,442
Revolving Loans Converted to Term	0		0
Total Loans	3,360		2,442
Other Commercial Loans [Member] | Substandard [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		117
2024/2023	113		0
2023/2022	0		1,784
2022/2021	3,925		40
Prior	700		714
Revolving Loans Amortized Cost Basis	2,147		4,257
Revolving Loans Converted to Term	1,443		1,443
Total Loans	8,328		8,355
Other Commercial Loans [Member] | Doubtful [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	63		66
Revolving Loans Converted to Term	2		5
Total Loans	65		71
Other Agricultural Loans [Member]
Loans [Abstract]
2026/2025	6,326		5,677
2025/2024	5,269		4,456
2024/2023	3,332		1,749
2023/2022	1,594		846
2022/2021	849		1,602
Prior	1,205		288
Revolving Loans Amortized Cost Basis	11,429		15,629
Revolving Loans Converted to Term	0		0
Total Loans	30,004		30,247
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0	0	0
Other Agricultural Loans [Member] | Pass [Member]
Loans [Abstract]
2026/2025	6,326		5,677
2025/2024	5,269		3,520
2024/2023	2,419		1,440
2023/2022	1,290		408
2022/2021	415		1,602
Prior	1,205		288
Revolving Loans Amortized Cost Basis	10,452		14,761
Revolving Loans Converted to Term	0		0
Total Loans	27,376		27,696
Other Agricultural Loans [Member] | Special Mention [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		936
2024/2023	913		15
2023/2022	12		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	748		639
Revolving Loans Converted to Term	0		0
Total Loans	1,673		1,590
Other Agricultural Loans [Member] | Substandard [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		294
2023/2022	292		438
2022/2021	434		0
Prior	0		0
Revolving Loans Amortized Cost Basis	229		229
Revolving Loans Converted to Term	0		0
Total Loans	955		961
Other Agricultural Loans [Member] | Doubtful [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	0		0
State and Political Subdivision Loans [Member]
Loans [Abstract]
2026/2025	11,047		1,504
2025/2024	2,961		27
2024/2023	0		1,291
2023/2022	1,275		12,737
2022/2021	12,706		9,932
Prior	35,732		26,509
Revolving Loans Amortized Cost Basis	156		100
Revolving Loans Converted to Term	0		0
Total Loans	63,877		52,100
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0	$ 0	0
State and Political Subdivision Loans [Member] | Pass [Member]
Loans [Abstract]
2026/2025	11,047		1,504
2025/2024	2,961		27
2024/2023	0		1,291
2023/2022	1,275		12,737
2022/2021	12,706		9,932
Prior	35,732		26,509
Revolving Loans Amortized Cost Basis	156		100
Revolving Loans Converted to Term	0		0
Total Loans	63,877		52,100
State and Political Subdivision Loans [Member] | Special Mention [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	0		0
State and Political Subdivision Loans [Member] | Substandard [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	0		0
State and Political Subdivision Loans [Member] | Doubtful [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total Loans	0		0
Total Loans [Member]
Loans [Abstract]
2026/2025	99,997		253,995
2025/2024	243,423		143,457
2024/2023	140,084		183,251
2023/2022	163,231		461,450
2022/2021	452,961		228,444
Prior	690,387		485,967
Revolving Loans Amortized Cost Basis	148,718		161,019
Revolving Loans Converted to Term	3,763		3,857
Total Loans	1,942,564		1,921,440
2026/2025	0
2025/2024	0
2024/2023	0
2023/2022	0
2022/2021	0
Prior	23
Revolving Loans Amortized Cost Basis	42
Revolving Loans Converted to Term	0
Gross charge-offs	65
Total Loans [Member] | Pass [Member]
Loans [Abstract]
2026/2025	99,997		252,643
2025/2024	242,580		136,655
2024/2023	133,334		177,059
2023/2022	157,074		420,803
2022/2021	409,783		210,996
Prior	650,939		464,277
Revolving Loans Amortized Cost Basis	137,955		147,971
Revolving Loans Converted to Term	2,244		2,334
Total Loans	1,833,906		1,812,738
Total Loans [Member] | Special Mention [Member]
Loans [Abstract]
2026/2025	0		55
2025/2024	45		6,018
2024/2023	950		4,088
2023/2022	4,055		7,374
2022/2021	10,938		13,444
Prior	21,288		9,101
Revolving Loans Amortized Cost Basis	5,336		5,537
Revolving Loans Converted to Term	0		0
Total Loans	42,612		45,617
Total Loans [Member] | Substandard [Member]
Loans [Abstract]
2026/2025	0		1,297
2025/2024	798		784
2024/2023	5,800		2,104
2023/2022	2,102		33,273
2022/2021	32,240		4,004
Prior	18,160		12,589
Revolving Loans Amortized Cost Basis	5,364		7,445
Revolving Loans Converted to Term	1,517		1,518
Total Loans	65,981		63,014
Total Loans [Member] | Doubtful [Member]
Loans [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	63		66
Revolving Loans Converted to Term	2		5
Total Loans	$ 65		$ 71