Loan And Allowance For Credit Losses - Changes in Allowance for Loan Losses (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	$ 75,834,000	$ 63,465,000
Provision for loan losses	15,050,000	11,540,000
Recoveries	1,549,000	3,281,000
Charge-offs	(3,699,000)	(2,452,000)
Ending balance	88,734,000	75,834,000
Agricultural [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	1,041,000	1,597,000
Provision for loan losses	(37,000)	(702,000)
Recoveries	286,000	155,000
Charge-offs	9,000	(9,000)
Ending balance	1,281,000	1,041,000
C&I [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	16,129,000	12,280,000
Provision for loan losses	1,118,000	3,485,000
Recoveries	267,000	953,000
Charge-offs	(1,816,000)	(589,000)
Ending balance	15,698,000	16,129,000
Muncipal [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	1,026,000	348,000
Provision for loan losses	(831,000)	678,000
Recoveries	0	0
Charge-offs	0	0
Ending balance	195,000	1,026,000
Construction & Development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	26,443,000	17,627,000
Provision for loan losses	2,004,000	8,916,000
Recoveries	106,000	0
Charge-offs	0	(100,000)
Ending balance	28,553,000	26,443,000
Farm [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	1,957,000	663,000
Provision for loan losses	957,000	1,294,000
Recoveries	0	0
Charge-offs	0	0
Ending balance	2,914,000	1,957,000
Non - Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	9,075,000	10,722,000
Provision for loan losses	4,279,000	(2,499,000)
Recoveries	71,000	852,000
Charge-offs	0	0
Ending balance	13,425,000	9,075,000
Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	9,928,000	10,828,000
Provision for loan losses	3,668,000	(1,062,000)
Recoveries	227,000	699,000
Charge-offs	(10,000)	(537,000)
Ending balance	13,813,000	9,928,000
Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	9,075,000	8,133,000
Provision for loan losses	2,813,000	1,014,000
Recoveries	24,000	114,000
Charge-offs	(258,000)	(186,000)
Ending balance	11,654,000	9,075,000
Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	845,000	896,000
Provision for loan losses	573,000	252,000
Recoveries	398,000	293,000
Charge-offs	(1,006,000)	(596,000)
Ending balance	810,000	845,000
Non - Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	315,000	371,000
Provision for loan losses	506,000	164,000
Recoveries	170,000	215,000
Charge-offs	(600,000)	(435,000)
Ending balance	$ 391,000	$ 315,000