Loan And Allowance For Credit Losses - Changes in Allowance for Loan Losses (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	$ 88,734,000	$ 75,834,000
Provision for loan losses	13,049,000	15,050,000
Recoveries	1,557,000	1,549,000
Charge-offs	(5,015,000)	(3,699,000)
Ending balance	98,325,000	88,734,000
Agricultural [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	1,281,000	1,041,000
Provision for loan losses	328,000	(37,000)
Recoveries	111,000	286,000
Charge-offs	(67,000)	(9,000)
Ending balance	1,653,000	1,281,000
C&I [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	15,698,000	16,129,000
Provision for loan losses	554,000	1,118,000
Recoveries	576,000	267,000
Charge-offs	(1,392,000)	(1,816,000)
Ending balance	15,436,000	15,698,000
Muncipal [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	195,000	1,026,000
Provision for loan losses	5,000	(831,000)
Recoveries	0	0
Charge-offs	0	0
Ending balance	200,000	195,000
Construction & Development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	28,553,000	26,443,000
Provision for loan losses	(8,491,000)	2,004,000
Recoveries	4,000	106,000
Charge-offs	(205,000)	0
Ending balance	19,861,000	28,553,000
Farm [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	2,914,000	1,957,000
Provision for loan losses	(43,000)	957,000
Recoveries	0	0
Charge-offs	0	0
Ending balance	2,871,000	2,914,000
Non - Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	13,425,000	9,075,000
Provision for loan losses	1,965,000	4,279,000
Recoveries	37,000	71,000
Charge-offs	(763,000)	0
Ending balance	14,664,000	13,425,000
Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	13,813,000	9,928,000
Provision for loan losses	7,478,000	3,668,000
Recoveries	122,000	227,000
Charge-offs	0	(10,000)
Ending balance	21,413,000	13,813,000
Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	11,654,000	9,075,000
Provision for loan losses	8,749,000	2,813,000
Recoveries	98,000	24,000
Charge-offs	(13,000)	(258,000)
Ending balance	20,488,000	11,654,000
Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	810,000	845,000
Provision for loan losses	1,608,000	573,000
Recoveries	448,000	398,000
Charge-offs	(1,680,000)	(1,006,000)
Ending balance	1,186,000	810,000
Non - Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	391,000	315,000
Provision for loan losses	896,000	506,000
Recoveries	161,000	170,000
Charge-offs	(895,000)	(600,000)
Ending balance	$ 553,000	$ 391,000