Condensed Parent Company Information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income tax benefit	$ 135,107	$ 104,841	$ (79,571)
Net income (loss)	524,089	463,215	(45,174)
Other comprehensive income (loss)	(718,247)	(134,004)	134,793
Comprehensive income (loss)	(194,158)	329,211	89,619
Hancock Whitney Corporation [Member]
Cash dividends received from bank subsidiaries	180,000	150,000	70,000
Cash dividend from nonbank subsidiary	2,500	5,000
Equity in earnings (loss) of subsidiaries greater than dividends received	355,853	327,950	(101,406)
Total operating income	538,353	482,950	(31,406)
Other expense, net	17,708	25,814	22,307
Income tax benefit	(3,444)	(6,079)	(8,539)
Net income (loss)	524,089	463,215	(45,174)
Other comprehensive income (loss)	(718,247)	(134,004)	134,793
Comprehensive income (loss)	$ (194,158)	$ 329,211	$ 89,619