Parent Company Financial Information (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash	$ 153,414	$ 218,899
Interest-earning deposits	671,300	434,867
Total cash and cash equivalents	824,714	653,766	$ 247,673	$ 277,587
Goodwill	823,172	765,842	765,842	765,842
Other assets	455,092	382,154
Total Assets	20,945,333	16,584,779
Liabilities and Shareholders’ Equity
Subordinated Debentures	10,000	35,092
Junior Subordinated Notes	10,310	0
Other liabilities	232,794	250,945
Total liabilities	18,356,591	14,237,172
Shareholders’ equity	2,588,742	2,347,607	2,159,962	2,033,649
Total liabilities and shareholders' equity	20,945,333	16,584,779
Parent Company
Assets
Cash	1,979	2,301
Interest-earning deposits	3,786	4,933
Total cash and cash equivalents	5,765	7,234	$ 27,805	$ 8,171
Investment in banking subsidiary	2,589,218	2,363,692
Investment in other subsidiaries	7,175	6,215
Goodwill	4,729	4,729
Other assets	2,525	1,668
Total Assets	2,609,412	2,383,538
Liabilities and Shareholders’ Equity
Subordinated Debentures	10,000	35,092
Junior Subordinated Notes	10,310	0
Other liabilities	360	839
Total liabilities	20,670	35,931
Shareholders’ equity	2,588,742	2,347,607
Total liabilities and shareholders' equity	$ 2,609,412	$ 2,383,538