Condensed Parent Company Financial Statements - Schedule of Statements of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 423,404	$ 490,908
Goodwill	656,672	653,524
Total assets	56,259,934	52,949,649	$ 50,142,143
Liabilities and Shareholders’ Equity
Subordinated notes	437,866	437,392
Other borrowings	645,813	596,614
Junior Subordinated Debentures	253,566	253,566
Shareholders’ equity	5,399,526	4,796,838	$ 4,498,688	$ 4,115,995
Total liabilities and shareholders’ equity	56,259,934	52,949,649
Reportable Legal Entities | Parent Company
Assets
Cash and due from banks	262,680	266,350
Available-for-sale debt securities and equity securities with readily determinable fair value	15,532	14,771
Investment in and receivable from subsidiaries	5,842,160	5,282,530
Goodwill	8,371	8,371
Other assets	364,623	360,309
Total assets	6,493,366	5,932,331
Liabilities and Shareholders’ Equity
Other liabilities	171,922	183,475
Subordinated notes	437,866	437,392
Other borrowings	230,486	261,060
Junior Subordinated Debentures	253,566	253,566
Shareholders’ equity	5,399,526	4,796,838
Total liabilities and shareholders’ equity	$ 6,493,366	$ 5,932,331