Condensed Parent Company Information (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net cash provided by operating activities	$ 842,021	$ 585,690	$ 355,191
Net cash provided by (used in) investing activities	662,358	(3,224,584)	(3,177,472)
Proceeds from issuance of long term debt	5,629	22,388	166,425
Repayment of long term debt	(480)	(153,444)	(308)
Dividends paid to stockholders	(94,458)	(95,927)	(95,605)
Other repurchases of common stock	(58,892)	(21,796)	(12,716)
Proceeds from dividend reinvestment and other incentive plans	3,577	3,872	4,164
Payroll tax remitted on net share settlement of equity awards	(7,386)	(7,364)	(4,530)
Net cash provided by (used in) financing activities	(1,341,121)	2,513,789	2,916,483
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	163,258	(125,105)	94,202
CASH AND DUE FROM BANKS, BEGINNING	401,201	526,306	432,104
CASH AND DUE FROM BANKS, ENDING	564,459	401,201	526,306
Hancock Whitney Corporation [Member]
Cash flows from operating activities - principally dividends received from subsidiaries	192,816	160,887	71,067
Net cash provided by operating activities	192,816	160,887	71,067
Proceeds from sale of premises and equipment	855
Net cash provided by (used in) investing activities	855
Proceeds from issuance of long term debt			166,425
Repayment of long term debt		(150,000)
Dividends paid to stockholders	(94,458)	(95,927)	(95,605)
Other repurchases of common stock	(58,892)	(21,796)	(12,716)
Proceeds from dividend reinvestment and other incentive plans	3,972	4,482	5,301
Payroll tax remitted on net share settlement of equity awards	7,386	7,364	(4,530)
Cash received under accelerated share repurchase agreement			12,110
Net cash provided by (used in) financing activities	(156,764)	(270,605)	70,985
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	36,907	(109,718)	142,052
CASH AND DUE FROM BANKS, BEGINNING	90,277	199,995	57,943
CASH AND DUE FROM BANKS, ENDING	$ 127,184	$ 90,277	$ 199,995