Condensed Parent Company Information (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total assets	$ 36,531,205	$ 33,638,602
Long term debt	244,220	378,322
Other liabilities	341,059	271,517
Stockholders' equity	3,670,352	3,439,025	$ 3,467,685	$ 3,081,340
Total liabilities and stockholders' equity	36,531,205	33,638,602
Hancock Whitney Corporation [Member]
Cash	90,277	199,995
Investment in bank subsidiaries	3,706,046	3,511,693
Investment in non-bank subsidiaries	24,726	25,134
Due from subsidiaries and other assets	17,323	15,464
Total assets	3,838,372	3,752,286
Long term debt	166,664	312,260
Other liabilities	1,356	1,001
Stockholders' equity	3,670,352	3,439,025
Total liabilities and stockholders' equity	$ 3,838,372	$ 3,752,286