Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Lines of credit	$ 4,146,287	$ 4,016,658
Loans approved but not closed	402,020	275,954
Overdraft limits	396,034	391,598
Letters of credit	43,591	38,929
Contingent obligations and other guarantees	$ 9,394	$ 15,037