Parent Company Condensed Financial Statements - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents due from subsidiary bank	$ 4,614,984	$ 3,481,784
Other assets	1,964,743	1,608,038
TOTAL	69,612,884	64,112,150	$ 60,870,701
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total stockholders’ equity	6,950,834	5,984,612	$ 5,837,218	$ 5,269,175
TOTAL	69,612,884	64,112,150
Parent Company
ASSETS
Cash and cash equivalents due from subsidiary bank	445,770	228,531
Investments in tax credit investments, net	0	1,925
Other assets	120,742	8,516
TOTAL	7,122,866	6,142,593
LIABILITIES AND STOCKHOLDERS’ EQUITY
Long-term debt	148,249	147,950
Other liabilities	23,783	10,031
Total stockholders’ equity	6,950,834	5,984,612
TOTAL	7,122,866	6,142,593
Parent Company | Bank
ASSETS
Investments in Subsidiaries	6,542,852	5,889,775
Parent Company | Nonbank
ASSETS
Investments in Subsidiaries	$ 13,502	$ 13,846