v3.26.1
Schedule of Assets (Held at End of Year) (Details) - EBP 003 - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Plan Name 401(k) SAVINGS PLAN  
Entity Tax Identification Number 64-0693170  
EBP, Plan Number 003  
Current Value $ 679,741,806  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
Notes Receivables from participants $ 7,736,264  
Notes Receivables from participants maturity date description maturity dates through 2030  
Total assets (Held at End of Year) as filed on Form 5500 $ 687,478,070  
Registered Investment Companies    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 400,817,441  
Collective Trust Funds    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value $ 227,077,727  
Minimum    
EBP, Schedule of Asset Held for Investment [Line Items]    
Notes Receivables from participants interest rate 4.25% 4.25%
Maximum    
EBP, Schedule of Asset Held for Investment [Line Items]    
Notes Receivables from participants interest rate 9.50% 9.50%
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX AGG 2035 FUND CL M 89,354 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX AGG 2035 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 89,354  
Current Value $ 2,296,713  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX AGG 2045 FUND CL M 49,583 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX AGG 2045 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 49,583  
Current Value $ 1,406,542  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX AGG 2055 FUND CL M 18,319 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX AGG 2055 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 18,319  
Current Value $ 527,692  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX AGG 2065 FUND CL M 56,866 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX AGG 2065 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 56,866  
Current Value $ 818,539  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX AGG RETIREMENT FUND CL M 7,945 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX AGG RETIREMENT FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 7,945  
Current Value $ 149,291  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX CNSRV 2035 FUND CL M 87,292 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX CNSRV 2035 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 87,292  
Current Value $ 1,670,028  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX CNSRV 2055 FUND CL M 1,486 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX CNSRV 2055 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 1,486  
Current Value $ 41,312  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX CNSRV 2065 FUND CL M 911 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX CNSRV 2065 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 911  
Current Value $ 13,068  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX CNSRV RETIREMENT FUND M 52,829 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX CNSRV RETIREMENT FUND M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 52,829  
Current Value $ 833,918  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX CONSERVATIVE 2045 M 38,782 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX CONSERVATIVE 2045 M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 38,782  
Current Value $ 898,300  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX MOD 2035 FUND CL M 3,304,428 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX MOD 2035 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 3,304,428  
Current Value $ 72,452,218  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX MOD 2045 FUND CL M 2,542,534 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX MOD 2045 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 2,542,534  
Current Value $ 64,780,471  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX MOD 2055 FUND CL M 980,623 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX MOD 2055 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 980,623  
Current Value $ 26,638,037  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX MOD 2065 FUND CL M 341,927 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX MOD 2065 FUND CL M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 341,927  
Current Value $ 4,806,060  
Investment, Identifier [Axis]: Collective Trust Funds: FLEXPATH INDEX MOD RETIREMENT FUND M 2,906,427 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FLEXPATH INDEX MOD RETIREMENT FUND M [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Collective Trust Funds  
EBP, investment, number of shares/units 2,906,427  
Current Value $ 49,745,538  
Investment, Identifier [Axis]: Common Stock: HANCOCK WHITNEY CORPORATION COMMON STOCK 482,901 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] HANCOCK WHITNEY CORPORATION COMMON STOCK [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:CommonStockMember  
EBP, investment, number of shares/units 482,901  
Current Value $ 30,751,151  
EBP, Asset Held for Investment, Party-in-Interest [true false] true  
Investment, Identifier [Axis]: Fully Benefit-Responsive Investment Contract: KEY GUARANTEED PORTFOLIO FUND 21,095,487 units    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] KEY GUARANTEED PORTFOLIO FUND [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] Fully Benefit Responsive Investment Contract [Member]  
EBP, investment, number of shares/units 21,095,487  
Current Value $ 21,095,487  
Investment, Identifier [Axis]: Mutual Funds: AB LARGE CAP GROWTH ADV 991,620 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] AB LARGE CAP GROWTH ADV [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 991,620  
Current Value $ 112,013,372  
Investment, Identifier [Axis]: Mutual Funds: AMERICAN FUNDS AMERICAN MUTUAL R5 436,781 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] AMERICAN FUNDS AMERICAN MUTUAL R5 [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 436,781  
Current Value $ 25,984,110  
Investment, Identifier [Axis]: Mutual Funds: BLACKROCK HIGH YIELD INSTL 1,230,511 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] BLACKROCK HIGH YIELD INSTL [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 1,230,511  
Current Value $ 8,884,286  
Investment, Identifier [Axis]: Mutual Funds: COHEN & STEERS GLOBAL REALTY A 5,228 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] COHEN & STEERS GLOBAL REALTY A [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 5,228  
Current Value $ 283,560  
Investment, Identifier [Axis]: Mutual Funds: FEDERATED HERMES INTERNATIONAL LEADER ISFGFLX 233,538 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FEDERATED HERMES INTERNATIONAL LEADER ISFGFLX [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 233,538  
Current Value $ 10,308,365  
Investment, Identifier [Axis]: Mutual Funds: FEDERATED HERMES MDT LARGE CAP VALUE IS 493,198 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FEDERATED HERMES MDT LARGE CAP VALUE IS [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 493,198  
Current Value $ 17,069,570  
Investment, Identifier [Axis]: Mutual Funds: FEDERATED HERMES MDT SMALL CP CORE IS 368,166 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FEDERATED HERMES MDT SMALL CP CORE IS [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 368,166  
Current Value $ 10,455,904  
Investment, Identifier [Axis]: Mutual Funds: FEDERATED HERMES TOTAL RETURN BOND INSTL 1,519,811 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] FEDERATED HERMES TOTAL RETURN BOND INSTL [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 1,519,811  
Current Value $ 14,574,991  
Investment, Identifier [Axis]: Mutual Funds: NOMURA SMALL CAP CORE INSTITUTIONAL 330,951 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] NOMURA SMALL CAP CORE INSTITUTIONAL [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 330,951  
Current Value $ 10,080,760  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD 500 INDEX ADMIRAL 154,993 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD 500 INDEX ADMIRAL [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 154,993  
Current Value $ 97,930,819  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD DEVELOPED MARKETS IDX INSTL 715,117 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD DEVELOPED MARKETS IDX INSTL [ Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 715,117  
Current Value $ 14,366,692  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD INFLATION-PROTECTED SECS INV 236,924 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD INFLATIONPROTECTED SECS INV [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 236,924  
Current Value $ 2,772,012  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD MID CAP INDEX I 471,181 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD MID CAP INDEX I [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 471,181  
Current Value $ 37,402,331  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD SHORT-TERM FEDERAL ADM 615,904 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD SHORTTERM FEDERAL ADM [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 615,904  
Current Value $ 6,374,604  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD SMALL CAP INDEX I 172,357 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD SMALL CAP INDEX I [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 172,357  
Current Value $ 21,299,908  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD TOTAL BOND MARKET INDEX INST 934,337 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD TOTAL BOND MARKET INDEX INST [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 934,337  
Current Value $ 9,128,471  
Investment, Identifier [Axis]: Mutual Funds: VANGUARD TOTAL INTL BD IDX ADMIRAL 97,504 shares    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Issuer Name [Extensible Enumeration] VANGUARD TOTAL INTL BD IDX ADMIRAL [Member]  
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:MutualFundMember  
EBP, investment, number of shares/units 97,504  
Current Value $ 1,887,686