Loans and Leases - Credit Quality Indicators for Loans and Leases Held-for-Investment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Loans and Leases [Abstract]
2026/2025	$ 39,978		$ 356,281
2025/2024	360,399		145,329
2024/2023	136,938		270,611
2023/2022	258,935		289,727
2022/2021	284,695		337,414
Prior	976,905		681,357
Revolving loans amortized cost	1,308,516		1,319,072
Revolving loans converted to term	250,505		249,154
Total net loans and leases	3,616,871		3,648,945
2026/2025	8		37
2025/2024	0		3
2024/2023	0		250
2023/2022	0		1,617
2022/2021	0		87
Prior	0		22
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total	8	$ 273	2,016
Commercial [Member]
Loans and Leases [Abstract]
2026/2025	28,119		201,711
2025/2024	211,352		38,557
2024/2023	37,793		103,052
2023/2022	100,013		136,222
2022/2021	134,914		200,062
Prior	532,706		356,496
Revolving loans amortized cost	308,217		290,112
Revolving loans converted to term	143,381		146,371
Total net loans and leases	1,496,495		1,472,583
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		380
2022/2021	0		0
Prior	0		0
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total	0		380
Agricultural [Member]
Loans and Leases [Abstract]
2026/2025	897		49,178
2025/2024	48,827		23,735
2024/2023	23,762		35,874
2023/2022	33,334		62,515
2022/2021	61,256		41,110
Prior	195,499		165,067
Revolving loans amortized cost	276,784		279,696
Revolving loans converted to term	49,622		48,493
Total net loans and leases	689,981		705,668
2026/2025	0		0
2025/2024	0		0
2024/2023	0		180
2023/2022	0		939
2022/2021	0		0
Prior	0		0
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total	0		1,119
Residential and Home Equity [Member]
Loans and Leases [Abstract]
2026/2025	7,946		35,670
2025/2024	35,369		29,212
2024/2023	27,823		31,874
2023/2022	29,445		50,922
2022/2021	50,307		76,178
Prior	200,252		128,404
Revolving loans amortized cost	52,291		52,468
Revolving loans converted to term	344		352
Total net loans and leases	403,777		405,080
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	0		0
Revolving loans converted to term	0		0
Total	0		0
Construction [Member]
Loans and Leases [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0
2023/2022	0		0
2022/2021	0		0
Prior	1,375		1,375
Revolving loans amortized cost	117,212		112,904
Revolving loans converted to term	13,900		13,900
Total net loans and leases	132,487		128,179
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	0		0
Revolving loans converted to term	0		0
Total	0		0
Real Estate [Member]
Loans and Leases [Abstract]
2026/2025	36,962		286,559
2025/2024	295,548		91,504
2024/2023	89,378		170,800
2023/2022	162,792		249,659
2022/2021	246,477		317,350
Prior	929,832		651,342
Revolving loans amortized cost	754,504		735,180
Revolving loans converted to term	207,247		209,116
Total net loans and leases	2,722,740		2,711,510
Total	0		1,499
Commercial & Industrial [Member]
Loans and Leases [Abstract]
2026/2025	1,691		39,666
2025/2024	38,518		21,289
2024/2023	16,266		29,692
2023/2022	27,974		16,284
2022/2021	15,527		13,167
Prior	17,236		5,310
Revolving loans amortized cost	312,226		337,575
Revolving loans converted to term	32,758		34,717
Total net loans and leases	462,196		497,700
2026/2025	0		0
2025/2024	0		0
2024/2023	0		70
2023/2022	0		98
2022/2021	0		53
Prior			12
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total	0		233
Agricultural [Member]
Loans and Leases [Abstract]
2026/2025	0		3,104
2025/2024	301		2,857
2024/2023	2,688		2,312
2023/2022	2,178		1,801
2022/2021	1,648		1,020
Prior	2,947		2,264
Revolving loans amortized cost	241,017		245,438
Revolving loans converted to term	10,500		5,321
Total net loans and leases	261,279		264,117
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		200
2022/2021	0		34
Prior	0		0
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total	0		234
Commercial Leases [Member]
Loans and Leases [Abstract]
2026/2025	637		25,516
2025/2024	24,854		29,201
2024/2023	28,241		67,198
2023/2022	65,506		21,749
2022/2021	20,832		5,854
Prior	25,946		21,429
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total net loans and leases	166,016		170,947
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	0		0
Revolving loans converted to term	0		0
Total	0		0
Consumer and Other [Member]
Loans and Leases [Abstract]
2026/2025	688		1,436
2025/2024	1,178		478
2024/2023	365		609
2023/2022	485		234
2022/2021	211		23
Prior	944		1,012
Revolving loans amortized cost	769		879
Revolving loans converted to term	0		0
Total net loans and leases	4,640		4,671
2026/2025	8		37
2025/2024	0		3
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	0		10
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total	8		50
Pass [Member]
Loans and Leases [Abstract]
2026/2025	39,805		352,713
2025/2024	357,031		145,329
2024/2023	136,938		270,611
2023/2022	258,935		288,908
2022/2021	283,905		330,166
Prior	973,639		678,227
Revolving loans amortized cost	1,304,053		1,313,860
Revolving loans converted to term	246,292		244,849
Total net loans and leases	3,600,598		3,624,663
Pass [Member] | Commercial [Member]
Loans and Leases [Abstract]
2026/2025	28,119		201,486
2025/2024	211,127		38,557
2024/2023	37,793		103,052
2023/2022	100,013		135,472
2022/2021	134,184		192,814
Prior	532,706		356,496
Revolving loans amortized cost	308,217		290,112
Revolving loans converted to term	143,381		146,371
Total net loans and leases	1,495,540		1,464,360
Pass [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2026/2025	897		46,027
2025/2024	45,684		23,735
2024/2023	23,762		35,874
2023/2022	33,334		62,515
2022/2021	61,256		41,110
Prior	192,470		161,982
Revolving loans amortized cost	272,571		274,736
Revolving loans converted to term	49,622		48,493
Total net loans and leases	679,596		694,472
Pass [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
2026/2025	7,946		35,670
2025/2024	35,369		29,212
2024/2023	27,823		31,874
2023/2022	29,445		50,922
2022/2021	50,307		76,178
Prior	200,024		128,370
Revolving loans amortized cost	52,089		52,266
Revolving loans converted to term	344		352
Total net loans and leases	403,347		404,844
Pass [Member] | Construction [Member]
Loans and Leases [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022			0
2022/2021	0		0
Prior	1,375		1,375
Revolving loans amortized cost	117,212		112,904
Revolving loans converted to term	13,900		13,900
Total net loans and leases	132,487		128,179
Pass [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
2026/2025	1,691		39,666
2025/2024	38,518		21,289
2024/2023	16,266		29,692
2023/2022	27,974		16,244
2022/2021	15,494		13,167
Prior	17,236		5,310
Revolving loans amortized cost	312,178		337,525
Revolving loans converted to term	28,588		30,455
Total net loans and leases	457,945		493,348
Pass [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2026/2025	0		3,104
2025/2024	301		2,857
2024/2023	2,688		2,312
2023/2022	2,178		1,772
2022/2021	1,621		1,020
Prior	2,947		2,264
Revolving loans amortized cost	241,017		245,438
Revolving loans converted to term	10,457		5,278
Total net loans and leases	261,209		264,045
Pass [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
2026/2025	637		25,516
2025/2024	24,854		29,201
2024/2023	28,241		67,198
2023/2022	65,506		21,749
2022/2021	20,832		5,854
Prior	25,946		21,429
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total net loans and leases	166,016		170,947
Pass [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
2026/2025	515		1,244
2025/2024	1,178		478
2024/2023	365		609
2023/2022	485		234
2022/2021	211		23
Prior	935		1,001
Revolving loans amortized cost	769		879
Revolving loans converted to term	0		0
Total net loans and leases	4,458		4,468
Special Mention [Member]
Loans and Leases [Abstract]
2026/2025	0		3,376
2025/2024	3,368		0
2024/2023	0		0
2023/2022	0		69
2022/2021	60		7,248
Prior	3,054		3,119
Revolving loans amortized cost	4,261		5,010
Revolving loans converted to term	4,213		4,305
Total net loans and leases	14,956		23,127
Special Mention [Member] | Commercial [Member]
Loans and Leases [Abstract]
2026/2025	0		225
2025/2024	225		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		7,248
Prior	0		0
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total net loans and leases	225		7,473
Special Mention [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2026/2025	0		3,151
2025/2024	3,143		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	3,029		3,085
Revolving loans amortized cost	4,213		4,960
Revolving loans converted to term	0		0
Total net loans and leases	10,385		11,196
Special Mention [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	25		34
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total net loans and leases	25		34
Special Mention [Member] | Construction [Member]
Loans and Leases [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	0		0
Revolving loans converted to term	0		0
Total net loans and leases	0		0
Special Mention [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		40
2022/2021	33		0
Prior	0		0
Revolving loans amortized cost	48		50
Revolving loans converted to term	4,170		4,262
Total net loans and leases	4,251		4,352
Special Mention [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0
2023/2022	0		29
2022/2021	27		0
Prior	0		0
Revolving loans amortized cost	0		0
Revolving loans converted to term	43		43
Total net loans and leases	70		72
Special Mention [Member] | Commercial Leases [Member]
Loans and Leases [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	0		0
Revolving loans converted to term	0		0
Total net loans and leases	0		0
Special Mention [Member] | Consumer and Other [Member]
Loans and Leases [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	0		0
Revolving loans converted to term	0		0
Total net loans and leases	0		0
Substandard [Member]
Loans and Leases [Abstract]
2026/2025	173		192
2025/2024	0		0
2024/2023	0		0
2023/2022	0		750
2022/2021	730		0
Prior	212		11
Revolving loans amortized cost	202		202
Revolving loans converted to term	0		0
Total net loans and leases	1,317		1,155
Substandard [Member] | Commercial [Member]
Loans and Leases [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		750
2022/2021	730		0
Prior	0		0
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total net loans and leases	730		750
Substandard [Member] | Agricultural [Member]
Loans and Leases [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	0		0
Revolving loans converted to term	0		0
Total net loans and leases	0		0
Substandard [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
2026/2025	0		0
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	203		0
Revolving loans amortized cost	202		202
Revolving loans converted to term	0		0
Total net loans and leases	405		202
Substandard [Member] | Construction [Member]
Loans and Leases [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	0		0
Revolving loans converted to term	0		0
Total net loans and leases	0		0
Substandard [Member] | Commercial & Industrial [Member]
Loans and Leases [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	0
Revolving loans converted to term	0		0
Total net loans and leases	0		0
Substandard [Member] | Agricultural [Member]
Loans and Leases [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	0
Revolving loans converted to term	0		0
Total net loans and leases			0
Substandard [Member] | Commercial Leases [Member]
Loans and Leases [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	0		0
Revolving loans converted to term	0		0
Total net loans and leases	0		0
Substandard [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
2026/2025	173		192
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
Prior	9		11
Revolving loans amortized cost	0		0
Revolving loans converted to term	0		0
Total net loans and leases	$ 182		$ 203