Condensed Financial Information Of Parent Company Condensed Financial Information Of Parent Company (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Other assets	$ 1,083,992	$ 860,326
Assets	40,443,344	29,498,442
Subordinated debt	863,300
Total liabilities	36,443,714	25,903,491
Stockholders' Equity Attributable to Parent Only	3,999,630	3,594,951	$ 4,954,697	$ 4,825,588
Total liabilities and stockholders' equity	40,443,344	29,498,442
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Cash	176,923	127,849
Investments In Consolidated Banking Subsidiaries	3,845,653	3,530,823
Other assets	122,324	75,835
Assets	4,144,900	3,734,507
Subordinated debt	135,055	135,055
Other Liabilities	10,215	4,501
Total liabilities	145,270	139,556
Stockholders' Equity Attributable to Parent Only	3,999,630	3,594,951
Total liabilities and stockholders' equity	$ 4,144,900	$ 3,734,507