Condensed Parent Company Information (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total assets	$ 35,578,573	$ 35,183,825
Long term debt	236,317	242,077
Other liabilities	523,089	531,143
Stockholders' equity	3,803,661	3,342,628	$ 3,670,352	$ 3,439,025
Total liabilities and stockholders' equity	35,578,573	35,183,825
Hancock Whitney Corporation [Member]
Cash	218,714	127,184
Investment in bank subsidiaries	3,712,718	3,342,743
Investment in non-bank subsidiaries	29,446	25,634
Due from subsidiaries and other assets	11,628	14,939
Total assets	3,972,506	3,510,500
Long term debt	166,968	166,816
Other liabilities	1,877	1,056
Stockholders' equity	3,803,661	3,342,628
Total liabilities and stockholders' equity	$ 3,972,506	$ 3,510,500