Parent Company Financial Statements - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets [Abstract]
Goodwill and other intangibles, net	$ 649,703	$ 376,534
Deferred income taxes, net	76,535	13,229
Other assets	456,078	455,954
Total assets	23,512,128	15,964,190	$ 11,628,775
Liabilities [Abstract]
Other liabilities	443,187	352,305
Total liabilities	20,105,776	12,536,138	10,028,622
Shareholders’ equity
Total shareholders’ equity	3,406,352	3,428,052	$ 1,600,153	$ 1,433,141
Total liabilities and shareholders’ equity	23,512,128	15,964,190
Parent Company
Assets [Abstract]
Cash and cash equivalents	134,671	741,034
Goodwill and other intangibles, net	744	744
Deferred income taxes, net	17,974	10,817
Investment in subsidiaries	3,250,133	2,674,133
Other assets	3,080	1,324
Total assets	3,406,602	3,428,052
Liabilities [Abstract]
Other liabilities	250	0
Total liabilities	250	0
Shareholders’ equity
Total shareholders’ equity	3,406,352	3,428,052
Total liabilities and shareholders’ equity	3,406,602	$ 3,428,052
Other/Eliminations
Assets [Abstract]
Cash and cash equivalents	$ 133,500