FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) (Details) - EMPLOYEE RETIREMENT SAVINGS PLAN
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12 Months Ended |
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Dec. 31, 2025
USD ($)
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Entity tax identification number |
47-0351813
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| Plan number |
003
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| Notes receivable from participants |
$ 14,925,876
|
| Total Investments and Loans |
$ 766,409,098
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| Minimum |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Interest rates of notes receivable from participants |
4.25%
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| Maximum |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Interest rates of notes receivable from participants |
9.50%
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| Investment, Identifier [Axis]: DFA Emerging Markets Core Equity 2 Portfolio Institutional Class, Mutual fund |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:DfaEmergingMarketsCoreEquity2PortfolioInstitutionalClassMember
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| Investment curent value type |
Mutual fund
|
| Current Value |
$ 6,795,990
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Eagle Mid Cap Growth CIT Founders Class, Common collective trust |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:EagleMidCapGrowthCitFoundersClassMember
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| Investment curent value type |
Common collective trust
|
| Current Value |
$ 9,240,109
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Fidelity 500 Index Fund, Mutual fund |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:Fidelity500IndexFundMember
|
| Investment curent value type |
Mutual fund
|
| Current Value |
$ 56,749,585
|
| Party-in-Interest |
true
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Fidelity Contrafund K6, Mutual fund |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:FidelityContrafundK6Member
|
| Investment curent value type |
Mutual fund
|
| Current Value |
$ 51,090,208
|
| Party-in-Interest |
true
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Fidelity Global ex U.S. Index Fund, Mutual fund |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:FidelityGlobalExU.s.IndexFundMember
|
| Investment curent value type |
Mutual fund
|
| Current Value |
$ 10,216,355
|
| Party-in-Interest |
true
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Fidelity Small Cap Value Fund, Mutual fund |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:FidelitySmallCapValueFundMember
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| Investment curent value type |
Mutual fund
|
| Current Value |
$ 4,875,608
|
| Party-in-Interest |
true
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Galliard Stable Return Fund Q, Common collective trust |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:GalliardStableReturnFundQMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 21,740,195
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: JP Morgan Mid Cap Value Fund Class L, Mutual fund |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:JpmorganMidCapValueFundClassLMember
|
| Investment curent value type |
Mutual fund
|
| Current Value |
$ 4,758,629
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Prudential Core Plus Bond Fund Class 15, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:PrudentialCorePlusBondFundClass15Member
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| Investment curent value type |
Common collective trust
|
| Current Value |
$ 17,778,820
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Putnam Large Cap Value Trust Class IA, Common collective trust |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:PutnamLargeCapValueTrustClassIaMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 14,916,744
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: T. Rowe Price Overseas Stock Fund I Class, Mutual fund |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:T.RowePriceOverseasStockFundIClassMember
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| Investment curent value type |
Mutual fund
|
| Current Value |
$ 12,121,899
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Valmont Industries, Inc. common stock |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:ValmontIndustriesInc.Member
|
| Investment curent value type |
Common stock
|
| Current Value |
$ 38,295,874
|
| Party-in-Interest |
true
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Inflation Protected Securities Fund Admiral Shares, Mutual fund |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:VanguardInflationProtectedSecuritiesFundAdmiralSharesMember
|
| Investment curent value type |
Mutual fund
|
| Current Value |
$ 3,088,779
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
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| Investment, Identifier [Axis]: Vanguard Mid-Cap Growth Index Fund Admiral Shares, Mutual fund |
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| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:VanguardMidCapGrowthIndexFundAdmiralSharesMember
|
| Investment curent value type |
Mutual fund
|
| Current Value |
$ 13,714,532
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2020 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:VanguardTargetRetirement2020TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 18,218,347
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2025 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
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| Issuer name |
vmi:VanguardTargetRetirement2025TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 44,890,612
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2030 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2030TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 77,221,463
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2035 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2035TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 76,894,240
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2040 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2040TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 70,147,005
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2045 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2045TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 62,995,092
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2050 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2050TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 48,927,668
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2055 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2055TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 32,240,518
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2060 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2060TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 25,406,343
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2065 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2065TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 6,929,374
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement 2070 Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirement2070TrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 3,194,137
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Vanguard Target Retirement Income Trust II, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VanguardTargetRetirementIncomeTrustIiMember
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 10,156,340
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investment, Identifier [Axis]: Voya Small Cap Growth Trust Fund Class 22, Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Issuer name |
vmi:VoyaSmallCapGrowthTrustFundClass22Member
|
| Investment curent value type |
Common collective trust
|
| Current Value |
$ 8,878,756
|
| Participation Status |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Mutual fund |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Current Value |
$ 163,411,585
|
| Common collective trust |
|
| FORM 5500, SCHEDULE H, PART IV, LINE 4(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR) |
|
| Current Value |
$ 549,775,763
|