v3.26.1
Derivative Financial Instruments - Schedule of Effects of Interest Rate Swap Agreements on Consolidated Statements of Income (Detail) - Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Loans, Including Fees [Member]        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Effects of derivatives on consolidated statement of income $ (237) $ (21) $ (444) $ (45)
Other [Member]        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Effects of derivatives on consolidated statement of income 21 25 42 50
Interest Income [Member]        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Effects of derivatives on consolidated statement of income $ (216) $ 4 $ (402) $ 5