Cash Due from Banks, Interest-Bearing Deposits and Federal Funds Sold - Summary of Vault Cash and Funds on Deposit with Federal Reserve Bank (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Average Amount Of Required Reserves [Abstract]
Vault cash and funds on deposit with the Federal Reserve Bank	$ 2,255,198	$ 2,942,665

Amount of pass-through reserves deposited with Federal Reserve Banks from member institutions of Federal Home Loan Banks (FHLBanks).

No definition available.

Name:	us-gaap_CashPassThroughReserveFederalHomeLoanBank
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant