Condensed Parent Company Information (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net cash provided by operating activities	$ 495,249	$ 842,021	$ 585,690
Proceeds from sale of premises and equipment	33,130	62	1,906
Net cash provided by (used in) investing activities	(295,211)	662,358	(3,224,584)
Proceeds from issuance of long term debt	0	5,629	22,388
Repayment of long term debt	0	(480)	(153,444)
Dividends paid to stockholders	(104,697)	(94,458)	(95,927)
Other repurchases of common stock	0	(58,892)	(21,796)
Proceeds from dividend reinvestment and other incentive plans	3,815	3,577	3,872
Payroll tax remitted on net share settlement of equity awards	(5,681)	(7,386)	(7,364)
Net cash provided by (used in) financing activities	(203,295)	(1,341,121)	2,513,789
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	(3,257)	163,258	(125,105)
CASH AND DUE FROM BANKS, BEGINNING	564,459	401,201	526,306
CASH AND DUE FROM BANKS, ENDING	561,202	564,459	401,201
Hancock Whitney Corporation [Member]
Cash flows from operating activities - principally dividends received from subsidiaries	198,093	192,816	160,887
Net cash provided by operating activities	198,093	192,816	160,887
Proceeds from sale of premises and equipment		855
Net cash provided by (used in) investing activities		855
Repayment of long term debt			(150,000)
Dividends paid to stockholders	(104,697)	(94,458)	(95,927)
Other repurchases of common stock		(58,892)	(21,796)
Proceeds from dividend reinvestment and other incentive plans	3,815	3,972	4,482
Payroll tax remitted on net share settlement of equity awards	(5,681)	(7,386)	(7,364)
Net cash provided by (used in) financing activities	(106,563)	(156,764)	(270,605)
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	91,530	36,907	(109,718)
CASH AND DUE FROM BANKS, BEGINNING	127,184	90,277	199,995
CASH AND DUE FROM BANKS, ENDING	$ 218,714	$ 127,184	$ 90,277