Condensed Parent Company Information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income tax benefit	$ 113,158	$ 97,526	$ 135,107
Net income	460,815	392,602	524,089
Other comprehensive income (loss), net of tax	15,035	151,055	(718,247)
Comprehensive income (loss)	475,850	543,657	(194,158)
Hancock Whitney Corporation [Member]
Cash dividends received from bank subsidiaries	205,000	185,000	180,000
Cash dividend from nonbank subsidiary	6,000		2,500
Equity in earnings of subsidiaries greater than dividends received	265,188	222,731	355,853
Total operating income	476,188	407,731	538,353
Other expense, net	19,828	19,587	17,708
Income tax benefit	(4,455)	(4,458)	(3,444)
Net income	460,815	392,602	524,089
Other comprehensive income (loss), net of tax	15,035	151,055	(718,247)
Comprehensive income (loss)	$ 475,850	$ 543,657	$ (194,158)