Parent Company Condensed Financial Statements - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents due from subsidiary bank	$ 3,481,784	$ 3,912,935
Other assets	1,608,038	1,459,687
TOTAL	64,112,150	60,870,701	$ 52,156,913
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total stockholders’ equity	5,984,612	5,837,218	$ 5,269,175	$ 5,017,617
TOTAL	64,112,150	60,870,701
Parent Company
ASSETS
Cash and cash equivalents due from subsidiary bank	228,531	345,018
Investments in Tax Credit Investments, net	1,925	4,082
Other assets	8,516	9,407
TOTAL	6,142,593	5,994,618
LIABILITIES AND STOCKHOLDERS’ EQUITY
Long-term debt	147,950	147,658
Other liabilities	10,031	9,742
Total stockholders’ equity	5,984,612	5,837,218
TOTAL	6,142,593	5,994,618
Parent Company | Bank
ASSETS
Investments in Subsidiaries	5,889,775	5,626,975
Parent Company | Nonbank
ASSETS
Investments in Subsidiaries	$ 13,846	$ 9,136