Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Impairment | $ 87 | $ 97 |
| 1-4 Family Real Estate Loans [Member] | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Impairment | 3 | 2 |
| Agricultural Real Estate Loans [Member] | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Impairment | 84 | 95 |
| Collateral Dependent [Member] | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Fair Value | 91 | 52 |
| Level 3 [Member] | Collateral Dependent [Member] | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Fair Value | $ 3,600 | $ 3,000 |