Loans and Allowance for Credit Losses - Summary of Nonaccrual Interest Income Written Off (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Non-accrual interest income written off	$ 1,009	$ 719	$ 365
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual interest income written off	227	115	87
Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual interest income written off	405	309	226
Residential Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual interest income written off	55	277	30
Agricultural Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual interest income written off	203	6	5
Agricultural [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual interest income written off	103	2	6
Consumer [Member]
Financing Receivable, Past Due [Line Items]
Non-accrual interest income written off	$ 16	$ 10	$ 11