Short-term Borrowings - Interest Expense on Short-Term Borrowings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Interest On Short Term Borrowings [Line Items]
Total interest on short-term borrowings	$ 3,494	$ 20,439	$ 21,747
Federal funds purchased
Interest On Short Term Borrowings [Line Items]
Total interest on short-term borrowings	0	2	40
Borrowings from FHLB
Interest On Short Term Borrowings [Line Items]
Total interest on short-term borrowings	3,042	1,777	21,108
Securities sold under agreements to repurchase
Interest On Short Term Borrowings [Line Items]
Total interest on short-term borrowings	452	368	599
Federal Reserve Bank Term Funding Program
Interest On Short Term Borrowings [Line Items]
Total interest on short-term borrowings	$ 0	$ 18,292	$ 0