Loans and Allowance for Credit Losses - Activity in Allowance for Credit Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	$ 17,918,000	$ 19,691,000	$ 14,734,000
Charge-offs	(200,000)	(2,275,000)	(16,524,000)
Recoveries	989,000	502,000	50,000
Net (charge-offs) recoveries	789,000	(1,773,000)	(16,474,000)
Provision (credit) for credit losses	700,000	0	21,181,000
Balance, end of period	19,407,000	17,918,000	19,691,000	$ 14,734,000
Total allowance for credit losses and reserve for unfunded commitments	19,871,000	18,382,000	20,155,000
Total provision (credit) for credit losses	700,000	0	21,145,000
Construction & Development [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	1,223,000	1,417,000	1,889,000
Charge-offs	0	0	0
Recoveries	0	0	0
Net (charge-offs) recoveries	0	0	0
Provision (credit) for credit losses	(1,000)	(194,000)	(516,000)
Balance, end of period	1,222,000	1,223,000	1,417,000	1,889,000
Total allowance for credit losses and reserve for unfunded commitments	1,332,000	1,425,000	1,575,000
Total provision (credit) for credit losses	(93,000)	(150,000)	(529,000)
1 - 4 Family Real Estate [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	1,313,000	1,271,000	890,000
Charge-offs	0	0	0
Recoveries	0	0	0
Net (charge-offs) recoveries	0	0	0
Provision (credit) for credit losses	(349,000)	42,000	519,000
Balance, end of period	964,000	1,313,000	1,271,000	890,000
Total allowance for credit losses and reserve for unfunded commitments	968,000	1,319,000	1,275,000
Total provision (credit) for credit losses	(351,000)	44,000	519,000
Commercial Real Estate - Other [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	6,992,000	6,889,000	5,080,000
Charge-offs	(197,000)	(275,000)	0
Recoveries	17,000	0	0
Net (charge-offs) recoveries	(180,000)	(275,000)	0
Provision (credit) for credit losses	43,000	378,000	1,977,000
Balance, end of period	6,855,000	6,992,000	6,889,000	5,080,000
Total allowance for credit losses and reserve for unfunded commitments	6,890,000	7,001,000	6,897,000
Total provision (credit) for credit losses	69,000	379,000	1,961,000
Commercial & Industrial [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	6,797,000	9,237,000	5,937,000
Charge-offs	0	(2,000,000)	(16,500,000)
Recoveries	965,000	495,000	40,000
Net (charge-offs) recoveries	965,000	(1,505,000)	(16,460,000)
Provision (credit) for credit losses	1,607,000	(935,000)	19,044,000
Balance, end of period	9,369,000	6,797,000	9,237,000	5,937,000
Total allowance for credit losses and reserve for unfunded commitments	9,662,000	7,027,000	9,517,000
Total provision (credit) for credit losses	1,670,000	(985,000)	19,050,000
Agricultural [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	1,106,000	628,000	765,000
Charge-offs	0	0	(7,000)
Recoveries	4,000	7,000	2,000
Net (charge-offs) recoveries	4,000	7,000	(5,000)
Provision (credit) for credit losses	(498,000)	471,000	17,000
Balance, end of period	612,000	1,106,000	628,000	765,000
Total allowance for credit losses and reserve for unfunded commitments	631,000	1,120,000	639,000
Total provision (credit) for credit losses	(493,000)	474,000	3,000
Consumer [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	487,000	249,000	173,000
Charge-offs	(3,000)	0	(17,000)
Recoveries	3,000	0	8,000
Net (charge-offs) recoveries	0	0	(9,000)
Provision (credit) for credit losses	(102,000)	238,000	140,000
Balance, end of period	385,000	487,000	249,000	173,000
Total allowance for credit losses and reserve for unfunded commitments	388,000	490,000	252,000
Total provision (credit) for credit losses	(102,000)	238,000	141,000
Cumulative Effect, Period of Adoption, Adjustment [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			250,000
Balance, end of period				250,000
ASU 2016-13 [Member]
Loans and Allowance for Credit Losses [Abstract]
Provision (credit) for credit losses				21,200,000
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			250,000
Balance, end of period				250,000
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Construction & Development [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			44,000
Balance, end of period				44,000
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | 1 - 4 Family Real Estate [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			(138,000)
Balance, end of period				(138,000)
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial Real Estate - Other [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			(168,000)
Balance, end of period				(168,000)
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial & Industrial [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			716,000
Balance, end of period				716,000
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Agricultural [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			(149,000)
Balance, end of period				(149,000)
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			(55,000)
Balance, end of period				(55,000)
Unfunded Commitments [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	464,000	464,000	0
Provision (credit) for credit losses	0	0	(36,000)
Balance, end of period	464,000	464,000	464,000	0
Unfunded Commitments [Member] | Construction & Development [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	202,000	158,000	0
Provision (credit) for credit losses	(92,000)	44,000	(13,000)
Balance, end of period	110,000	202,000	158,000	0
Unfunded Commitments [Member] | 1 - 4 Family Real Estate [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	6,000	4,000	0
Provision (credit) for credit losses	(2,000)	2,000	0
Balance, end of period	4,000	6,000	4,000	0
Unfunded Commitments [Member] | Commercial Real Estate - Other [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	9,000	8,000	0
Provision (credit) for credit losses	26,000	1,000	(16,000)
Balance, end of period	35,000	9,000	8,000	0
Unfunded Commitments [Member] | Commercial & Industrial [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	230,000	280,000	0
Provision (credit) for credit losses	63,000	(50,000)	6,000
Balance, end of period	293,000	230,000	280,000	0
Unfunded Commitments [Member] | Agricultural [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	14,000	11,000	0
Provision (credit) for credit losses	5,000	3,000	(14,000)
Balance, end of period	19,000	14,000	11,000	0
Unfunded Commitments [Member] | Consumer [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period	3,000	3,000	0
Provision (credit) for credit losses	0	0	1,000
Balance, end of period	$ 3,000	3,000	3,000	0
Unfunded Commitments [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period		$ 500,000
Balance, end of period			500,000
Unfunded Commitments [Member] | ASU 2016-13 [Member]
Loans and Allowance for Credit Losses [Abstract]
Provision (credit) for credit losses			36,000
Unfunded Commitments [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			500,000
Balance, end of period				500,000
Unfunded Commitments [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Construction & Development [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			171,000
Balance, end of period				171,000
Unfunded Commitments [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | 1 - 4 Family Real Estate [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			4,000
Balance, end of period				4,000
Unfunded Commitments [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial Real Estate - Other [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			24,000
Balance, end of period				24,000
Unfunded Commitments [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial & Industrial [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			274,000
Balance, end of period				274,000
Unfunded Commitments [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Agricultural [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			25,000
Balance, end of period				25,000
Unfunded Commitments [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer [Member]
Loans and Allowance for Credit Losses [Abstract]
Balance, beginning of period			$ 2,000
Balance, end of period				$ 2,000