Condensed Financial Information - Parent Company Only Income statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Total Non-Interest Income	$ 273,745	$ 229,388	$ 216,160
Income tax benefit	58,748	24,195	37,649
Net Income	275,497	178,040	226,339
Preferred stock dividends	(10,277)	(2,135)	0
Net Income Available to Common Shareholders	265,220	175,905	226,339
Parent
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiaries	469,339	161,000	209,000
Other	258	100	191,978
Total Non-Interest Income	469,597	161,100	400,978
Expenses	58,527	48,634	218,837
Income Before Income Taxes	411,070	112,466	182,141
Income tax benefit	(12,516)	(9,679)	(5,798)
Income before equity in undistributed income of subsidiaries	423,586	122,145	187,939
Net Income	275,497	178,040	226,339
Preferred stock dividends	(10,277)
Net Income Available to Common Shareholders	265,220
Parent | Bank subsidiary
Condensed Financial Statements, Captions [Line Items]
Non-bank subsidiaries	(133,157)	162,037	44,926
Parent | Non-bank subsidiaries
Condensed Financial Statements, Captions [Line Items]
Non-bank subsidiaries	$ (14,932)	$ (106,142)	$ (6,526)