Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Lines of credit	$ 4,016,658	$ 3,806,398
Loans approved but not closed	275,954	398,204
Overdraft limits	391,598	380,143
Letters of credit	38,929	30,362
Contingent obligations and other guarantees	$ 15,037	$ 30,782