Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Debt Disclosure [Abstract]
Securities sold under agreements with customers to repurchase	$ 621,791	$ 618,829	$ 749,278
Short-term borrowings	108,700	2,625	4,250
Other Borrowings	21,053	21,053	21,053
Total	$ 751,544	$ 642,507	$ 774,581