Loans and Leases - Outstanding Loan and Lease Balances Held-for-Investment by Segment and Class, Credit Quality Indicators, Vintage Year by Class of Financing Receivable and Current Period Gross Charge-Offs by Year of Origination (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Loans and Leases [Abstract]
2025/2024	$ 234,013		$ 234,013		$ 186,156
2024/2023	152,339		152,339		312,394
2023/2022	290,550		290,550		342,235
2022/2021	316,448		316,448		357,849
2021/2020	341,894		341,894		267,105
Prior	723,380		723,380		577,824
Revolving loans amortized cost	1,315,418		1,315,418		1,469,488
Revolving loans converted to term	234,304		234,304		165,337
Total net loans and leases	3,608,346		3,608,346		3,678,388
2025/2024			31		294
2024/2023			3		206
2023/2022			249		0
2022/2021			1,412		44
2021/2020			87		100
Prior			22		214
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	962	$ 255	1,804	$ 281	858
Commercial [Member]
Loans and Leases [Abstract]
2025/2024	142,814		142,814		63,216
2024/2023	39,281		39,281		117,550
2023/2022	115,585		115,585		165,013
2022/2021	158,681		158,681		209,222
2021/2020	203,075		203,075		134,254
Prior	373,009		373,009		292,496
Revolving loans amortized cost	259,488		259,488		271,701
Revolving loans converted to term	126,059		126,059		99,819
Total net loans and leases	1,417,992		1,417,992		1,353,271
2025/2024			0		0
2024/2023			0		0
2023/2022			0		0
2022/2021			175		0
2021/2020			0		0
Prior			0		0
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	0	0	175	0	0
Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	34,801		34,801		24,877
2024/2023	24,140		24,140		36,693
2023/2022	36,128		36,128		69,209
2022/2021	63,037		63,037		38,847
2021/2020	39,299		39,299		48,551
Prior	183,537		183,537		174,312
Revolving loans amortized cost	280,916		280,916		326,451
Revolving loans converted to term	48,931		48,931		32,086
Total net loans and leases	710,789		710,789		751,026
2025/2024			0		0
2024/2023			0		0
2023/2022			180		0
2022/2021			939		0
2021/2020			0		0
Prior			0		0
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	939	0	1,119	0	0
Residential and Home Equity [Member]
Loans and Leases [Abstract]
2025/2024	27,780		27,780		33,036
2024/2023	30,047		30,047		37,378
2023/2022	33,424		33,424		57,760
2022/2021	51,862		51,862		82,936
2021/2020	78,030		78,030		72,304
Prior	132,950		132,950		73,048
Revolving loans amortized cost	50,187		50,187		47,872
Revolving loans converted to term	355		355		65
Total net loans and leases	404,635		404,635		404,399
2025/2024			0		0
2024/2023			0		29
2023/2022			0		0
2022/2021			0		0
2021/2020			0		0
Prior			0		0
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	0	29	0	29	29
Construction [Member]
Loans and Leases [Abstract]
2025/2024	0		0		5,774
2024/2023	2,700		2,700		0
2023/2022	0		0		1,000
2022/2021	500		500		0
2021/2020	0		0		0
Prior	1,374		1,374		1,375
Revolving loans amortized cost	150,218		150,218		186,754
Revolving loans converted to term	15,889		15,889		0
Total net loans and leases	170,681		170,681		194,903
2025/2024			0		0
2024/2023			0		0
2023/2022			0		0
2022/2021			0		0
2021/2020			0		0
Prior			0		0
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	0	0	0	0	0
Real Estate [Member]
Loans and Leases [Abstract]
2025/2024	205,395		205,395		126,903
2024/2023	96,168		96,168		191,621
2023/2022	185,137		185,137		292,982
2022/2021	274,080		274,080		331,005
2021/2020	320,404		320,404		255,109
Prior	690,870		690,870		541,231
Revolving loans amortized cost	740,809		740,809		832,778
Revolving loans converted to term	191,234		191,234		131,970
Total net loans and leases	2,704,097		2,704,097		2,703,599
Total	939	29	1,294	29
Commercial & Industrial [Member]
Loans and Leases [Abstract]
2025/2024	19,562		19,562		23,235
2024/2023	22,263		22,263		41,802
2023/2022	32,421		32,421		20,132
2022/2021	17,159		17,159		16,751
2021/2020	14,027		14,027		3,525
Prior	6,420		6,420		6,573
Revolving loans amortized cost	340,851		340,851		365,386
Revolving loans converted to term	35,737		35,737		26,999
Total net loans and leases	488,440		488,440		504,403
2025/2024			0		231
2024/2023			0		176
2023/2022			69		0
2022/2021			98		44
2021/2020			53		100
Prior			12		185
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	0	200	232	200	736
Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	192		192		2,831
2024/2023	3,199		3,199		2,820
2023/2022	2,431		2,431		2,625
2022/2021	2,265		2,265		1,708
2021/2020	1,133		1,133		393
Prior	2,414		2,414		2,471
Revolving loans amortized cost	232,991		232,991		270,631
Revolving loans converted to term	7,333		7,333		6,368
Total net loans and leases	251,958		251,958		289,847
2025/2024			0		0
2024/2023			0		0
2023/2022			0		0
2022/2021			200		0
2021/2020			34		0
Prior			0		0
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	0	0	234	0	0
Commercial Leases [Member]
Loans and Leases [Abstract]
2025/2024	7,614		7,614		31,977
2024/2023	30,148		30,148		74,956
2023/2022	69,867		69,867		25,961
2022/2021	22,649		22,649		8,314
2021/2020	6,297		6,297		8,065
Prior	22,549		22,549		26,182
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	159,124		159,124		175,455
2025/2024			0		0
2024/2023			0		0
2023/2022			0		0
2022/2021			0		0
2021/2020			0		0
Prior			0		0
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	0	0	0	0	0
Consumer and Other [Member]
Loans and Leases [Abstract]
2025/2024	1,250		1,250		1,210
2024/2023	561		561		1,195
2023/2022	694		694		535
2022/2021	295		295		71
2021/2020	33		33		13
Prior	1,127		1,127		1,367
Revolving loans amortized cost	767		767		693
Revolving loans converted to term	0		0		0
Total net loans and leases	4,727		4,727		5,084
2025/2024			31		63
2024/2023			3		1
2023/2022			0		0
2022/2021			0		0
2021/2020			0		0
Prior			10		29
Revolving loans amortized cost			0		0
Revolving loans converted to term			0		0
Total	23	$ 26	44	$ 52	93
Pass [Member]
Loans and Leases [Abstract]
2025/2024	230,458		230,458		185,995
2024/2023	152,339		152,339		310,007
2023/2022	290,550		290,550		336,887
2022/2021	315,413		315,413		357,813
2021/2020	334,629		334,629		265,006
Prior	720,161		720,161		571,556
Revolving loans amortized cost	1,306,883		1,306,883		1,449,550
Revolving loans converted to term	229,913		229,913		162,564
Total net loans and leases	3,580,346		3,580,346		3,639,378
Pass [Member] | Commercial [Member]
Loans and Leases [Abstract]
2025/2024	142,589		142,589		63,216
2024/2023	39,281		39,281		117,550
2023/2022	115,585		115,585		163,875
2022/2021	157,726		157,726		209,222
2021/2020	195,827		195,827		134,254
Prior	373,009		373,009		292,326
Revolving loans amortized cost	256,616		256,616		270,231
Revolving loans converted to term	126,059		126,059		99,819
Total net loans and leases	1,406,692		1,406,692		1,350,493
Pass [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	31,645		31,645		24,877
2024/2023	24,140		24,140		36,693
2023/2022	36,128		36,128		69,209
2022/2021	63,037		63,037		38,847
2021/2020	39,299		39,299		46,452
Prior	180,437		180,437		169,301
Revolving loans amortized cost	275,808		275,808		309,661
Revolving loans converted to term	48,931		48,931		32,086
Total net loans and leases	699,425		699,425		727,126
Pass [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
2025/2024	27,780		27,780		33,036
2024/2023	30,047		30,047		37,378
2023/2022	33,424		33,424		57,760
2022/2021	51,862		51,862		82,936
2021/2020	78,030		78,030		72,304
Prior	132,843		132,843		72,360
Revolving loans amortized cost	49,851		49,851		47,669
Revolving loans converted to term	355		355		65
Total net loans and leases	404,192		404,192		403,508
Pass [Member] | Construction [Member]
Loans and Leases [Abstract]
2025/2024	0		0		5,774
2024/2023	2,700		2,700		0
2023/2022	0		0		1,000
2022/2021	500		500		0
2021/2020	0		0		0
Prior	1,374		1,374		1,375
Revolving loans amortized cost	150,218		150,218		186,754
Revolving loans converted to term	15,889		15,889		0
Total net loans and leases	170,681		170,681		194,903
Pass [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
2025/2024	19,562		19,562		23,235
2024/2023	22,263		22,263		39,415
2023/2022	32,421		32,421		20,065
2022/2021	17,112		17,112		16,715
2021/2020	14,010		14,010		3,525
Prior	6,420		6,420		6,192
Revolving loans amortized cost	340,648		340,648		363,947
Revolving loans converted to term	31,389		31,389		24,269
Total net loans and leases	483,825		483,825		497,363
Pass [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	192		192		2,831
2024/2023	3,199		3,199		2,820
2023/2022	2,431		2,431		2,584
2022/2021	2,232		2,232		1,708
2021/2020	1,133		1,133		393
Prior	2,414		2,414		2,471
Revolving loans amortized cost	232,975		232,975		270,595
Revolving loans converted to term	7,290		7,290		6,325
Total net loans and leases	251,866		251,866		289,727
Pass [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
2025/2024	7,614		7,614		31,977
2024/2023	30,148		30,148		74,956
2023/2022	69,867		69,867		21,859
2022/2021	22,649		22,649		8,314
2021/2020	6,297		6,297		8,065
Prior	22,549		22,549		26,182
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	159,124		159,124		171,353
Pass [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
2025/2024	1,076		1,076		1,049
2024/2023	561		561		1,195
2023/2022	694		694		535
2022/2021	295		295		71
2021/2020	33		33		13
Prior	1,115		1,115		1,349
Revolving loans amortized cost	767		767		693
Revolving loans converted to term	0		0		0
Total net loans and leases	4,541		4,541		4,905
Special Mention [Member]
Loans and Leases [Abstract]
2025/2024	3,381		3,381		0
2024/2023	0		0		2,280
2023/2022	0		0		5,348
2022/2021	80		80		3
2021/2020	7,248		7,248		2,099
Prior	3,151		3,151		5,647
Revolving loans amortized cost	8,183		8,183		19,277
Revolving loans converted to term	4,391		4,391		2,543
Total net loans and leases	26,434		26,434		37,197
Special Mention [Member] | Commercial [Member]
Loans and Leases [Abstract]
2025/2024	225		225		0
2024/2023	0		0		0
2023/2022	0		0		1,138
2022/2021	0		0		0
2021/2020	7,248		7,248		0
Prior	0		0		170
Revolving loans amortized cost	2,872		2,872		1,470
Revolving loans converted to term	0		0		0
Total net loans and leases	10,345		10,345		2,778
Special Mention [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	3,156		3,156		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		2,099
Prior	3,100		3,100		5,011
Revolving loans amortized cost	5,108		5,108		16,790
Revolving loans converted to term	0		0		0
Total net loans and leases	11,364		11,364		23,900
Special Mention [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	51		51		85
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	51		51		85
Special Mention [Member] | Construction [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	0		0		0
Special Mention [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		2,280
2023/2022	0		0		67
2022/2021	47		47		3
2021/2020	0		0		0
Prior	0		0		381
Revolving loans amortized cost	203		203		1,017
Revolving loans converted to term	4,348		4,348		2,500
Total net loans and leases	4,598		4,598		6,248
Special Mention [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		41
2022/2021	33		33		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	43		43		43
Total net loans and leases	76		76		84
Special Mention [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		4,102
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	0		0		4,102
Special Mention [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	0		0		0
Substandard [Member]
Loans and Leases [Abstract]
2025/2024	174		174		161
2024/2023	0		0		107
2023/2022	0		0		0
2022/2021	955		955		33
2021/2020	17		17		0
Prior	68		68		621
Revolving loans amortized cost	352		352		661
Revolving loans converted to term	0		0		230
Total net loans and leases	1,566		1,566		1,813
Substandard [Member] | Commercial [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	955		955		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	955		955		0
Substandard [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	0		0		0
Substandard [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	56		56		603
Revolving loans amortized cost	336		336		203
Revolving loans converted to term	0		0		0
Total net loans and leases	392		392		806
Substandard [Member] | Construction [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	0		0		0
Substandard [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		107
2023/2022	0		0		0
2022/2021	0		0		33
2021/2020	17		17		0
Prior	0		0		0
Revolving loans amortized cost	0		0		422
Revolving loans converted to term	0		0		230
Total net loans and leases	17		17		792
Substandard [Member] | Agricultural [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	16		16		36
Revolving loans converted to term	0		0		0
Total net loans and leases	16		16		36
Substandard [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	0		0		0
Substandard [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
2025/2024	174		174		161
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	12		12		18
Revolving loans amortized cost	0		0		0
Revolving loans converted to term	0		0		0
Total net loans and leases	$ 186		$ 186		$ 179