Condensed Parent Company Financial Statements (Statements of Financial Condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 490,908	$ 411,150
Goodwill	653,524	655,149
Total assets	52,949,649	50,142,143	$ 45,080,768
Liabilities and Shareholders’ Equity
Subordinated notes	437,392	436,938
Other borrowings	596,614	494,136
Junior Subordinated Debentures	253,566	253,566
Shareholders’ equity	4,796,838	4,498,688	$ 4,115,995	$ 3,691,250
Total liabilities and shareholders’ equity	52,949,649	50,142,143
Reportable Legal Entities | Parent Company
Assets
Cash and due from banks	266,350	181,157
Available-for-sale debt securities and equity securities with readily determinable fair value	14,771	17,089
Investment in and receivable from subsidiaries	5,282,530	4,966,720
Goodwill	8,371	8,371
Other assets	360,309	354,148
Total assets	5,932,331	5,527,485
Liabilities and Shareholders’ Equity
Other liabilities	183,475	194,681
Subordinated notes	437,392	436,938
Other borrowings	261,060	143,612
Junior Subordinated Debentures	253,566	253,566
Shareholders’ equity	4,796,838	4,498,688
Total liabilities and shareholders’ equity	$ 5,932,331	$ 5,527,485