Parent Company Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Assets	$ 737,741	$ 691,631
Assets, Total	9,560,254	9,279,021	$ 8,558,377
Subordinated Debt	188,210	187,774
Other Liabilities	117,971	103,903
Total liabilities	8,449,495	8,238,765
Total liabilities and shareholders’ equity	9,560,254	9,279,021
Parent Company
Cash	243,531	248,814	$ 73,663	$ 75,094
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	1,020,556	969,054
Debentures Receivable From Subsidiary Banks	25,000	25,000
Due from Other Related Parties, Current	0	1,823
Other Investments	3,327	5,375
Other Assets	16,909	23,333
Assets, Total	1,309,323	1,273,399
Long-term Debt	0	32,500
Subordinated Debt	188,210	187,774
Accounts Payable, Related Parties	0	132
Other Liabilities	10,354	12,737
Total liabilities	198,564	233,143
Stockholders' Equity Attributable to Parent	1,110,759	1,040,256
Total liabilities and shareholders’ equity	$ 1,309,323	$ 1,273,399