Condensed Parent Company Information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income tax benefit	$ 97,526	$ 135,107	$ 104,841
Net income	392,602	524,089	463,215
Other comprehensive income (loss)	151,055	(718,247)	(134,004)
Comprehensive income (loss)	543,657	(194,158)	329,211
Hancock Whitney Corporation [Member]
Cash dividends received from bank subsidiaries	185,000	180,000	150,000
Cash dividend from nonbank subsidiary		2,500	5,000
Equity in earnings of subsidiaries greater than dividends received	222,731	355,853	327,950
Total operating income	407,731	538,353	482,950
Other expense, net	19,587	17,708	25,814
Income tax benefit	(4,458)	(3,444)	(6,079)
Net income	392,602	524,089	463,215
Other comprehensive income (loss)	151,055	(718,247)	(134,004)
Comprehensive income (loss)	$ 543,657	$ (194,158)	$ 329,211