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Short-Term Borrowings - Short-Term Borrowings and the Related Weighted-Average Interest Rates (Detail) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Short-Term Debt [Line Items]    
Short-term borrowings $ 198,573 $ 176,090
Federal Funds Purchased [Member]    
Short-Term Debt [Line Items]    
Short-term borrowings 0 0
Securities Sold Under Agreements to Repurchase [Member]    
Short-Term Debt [Line Items]    
Short-term borrowings $ 198,573 $ 176,090