Condensed Parent Company Information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income tax benefit	$ 104,841	$ (79,571)	$ 65,359
Net income (loss)	463,215	(45,174)	327,380
Other comprehensive income (loss)	(134,004)	134,793	125,985
Comprehensive income	329,211	89,619	453,365
Hancock Whitney Corporation [Member]
Cash dividends received from bank subsidiaries	150,000	70,000	240,000
Cash dividend from nonbank Subsidiary	5,000		5,000
Equity in earnings (loss) of subsidiaries greater than dividends received	327,950	(101,406)	94,185
Total operating income	482,950	(31,406)	339,185
Other expense, net	25,814	22,307	15,635
Income tax benefit	(6,079)	(8,539)	(3,830)
Net income (loss)	463,215	(45,174)	327,380
Other comprehensive income (loss)	(134,004)	134,793	125,985
Comprehensive income	$ 329,211	$ 89,619	$ 453,365