$VMI
VALMONT INDUSTRIES INC Stock $vmi

$vmi Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000010272920000004 Filed on February 26, 2020

Income Statement

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$697.4M	$678.7M	$682.4M
YoY Change	-2.46%	-0.31%	7.05%
Cost Of Revenue	$547.7M	$514.4M	$507.4M
YoY Change	0.55%	-0.55%	7.3%
Gross Profit	$149.7M	$164.3M	$175.0M
YoY Change	-12.09%	0.46%	6.31%
Gross Profit Margin	21.47%	24.21%	25.64%
Selling, General & Admin	$113.4M	$110.2M	$111.3M
YoY Change	6.58%	6.47%	11.39%
% of Gross Profit	75.75%	67.06%	63.62%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$20.80M	$20.30M	$20.50M
YoY Change	-3.26%	-3.33%	-1.57%
% of Gross Profit	13.89%	12.35%	11.71%
Operating Expenses	$113.4M	$110.2M	$111.3M
YoY Change	6.58%	6.47%	11.39%
Operating Profit	$36.30M	$38.36M	$63.67M
YoY Change	-43.18%	-36.16%	-1.52%
Interest Expense	-$9.500M	$10.95M	$11.79M
YoY Change	-3.06%	-2.11%	4.31%
% of Operating Profit	-26.17%	28.56%	18.52%
Other Income/Expense, Net	-$1.600M	-$22.28M	-$14.59M
YoY Change	-1700.0%	133.79%	56.29%
Pretax Income	$25.30M	$15.60M	$42.34M
YoY Change	-53.32%	-46.01%	19.51%
Income Tax	$6.400M	$9.091M	$14.41M
% Of Pretax Income	25.3%	58.29%	34.03%
Net Earnings	$17.70M	$6.991M	$34.68M
YoY Change	-591.67%	-80.93%	-13.22%
Net Earnings / Revenue	2.54%	1.03%	5.08%
Basic Earnings Per Share	$0.80	$0.20	$1.47
Diluted Earnings Per Share	$0.80	$0.20	$1.46
COMMON SHARES
Basic Shares Outstanding	22.09M shares	22.22M shares	22.44M shares
Diluted Shares Outstanding		22.35M shares	22.57M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$313.2M	$295.6M	$722.6M
YoY Change	-36.44%	-34.05%	69.94%
Cash & Equivalents	$313.2M	$295.6M	$722.6M
Short-Term Investments
Other Short-Term Assets	$42.80M	$40.70M	$127.8M
YoY Change	-1.83%	-6.44%	134.5%
Inventory	$383.6M	$399.9M	$382.0M
Prepaid Expenses
Receivables	$596.5M	$613.0M	$472.8M
Other Receivables	$4.600M	$13.20M	$9.900M
Total Short-Term Assets	$1.341B	$1.362B	$1.715B
YoY Change	-8.96%	-5.92%	28.83%
LONG-TERM ASSETS
Property, Plant & Equipment	$514.0M	$507.7M	$492.7M
YoY Change	-0.95%	-2.81%	-5.19%
Goodwill	$385.2M	$389.6M	$321.4M
YoY Change	14.06%	15.69%	-0.83%
Intangibles	$176.0M	$178.7M	$124.5M
YoY Change	26.95%	25.76%	-12.29%
Long-Term Investments
YoY Change
Other Assets	$114.5M	$124.7M	$125.7M
YoY Change	-14.85%	-22.45%	-16.16%
Total Long-Term Assets	$1.243B	$1.201B	$1.064B
YoY Change	10.05%	3.33%	-6.28%
TOTAL ASSETS
Total Short-Term Assets	$1.341B	$1.362B	$1.715B
Total Long-Term Assets	$1.243B	$1.201B	$1.064B
Total Assets	$2.584B	$2.563B	$2.779B
YoY Change	-0.71%	-1.8%	12.67%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$218.1M	$200.5M	$193.6M
YoY Change	-4.3%	-7.24%	-0.47%
Accrued Expenses	$91.94M	$106.9M	$79.36M
YoY Change	13.47%	0.65%	-29.29%
Deferred Revenue	$4.906M	$5.088K	$4.669K
YoY Change	66485.23%
Short-Term Debt	$10.70M	$3.300M	$300.0K
YoY Change	5250.0%	725.0%	-70.0%
Long-Term Debt Due	$779.0K	$829.0K	$253.1M
YoY Change	-19.36%	-12.64%	29328.02%
Total Short-Term Liabilities	$409.0M	$400.7M	$606.6M
YoY Change	1.5%	-3.08%	58.49%
LONG-TERM LIABILITIES
Long-Term Debt	$741.8M	$736.2M	$736.3M
YoY Change	-1.6%	-2.39%	-2.41%
Other Long-Term Liabilities	$10.39M	$19.31M	$20.39M
YoY Change	-49.51%	42.44%	31.45%
Total Long-Term Liabilities	$752.2M	$755.5M	$756.7M
YoY Change	-2.87%	-1.6%	-1.73%
TOTAL LIABILITIES
Total Short-Term Liabilities	$409.0M	$400.7M	$606.6M
Total Long-Term Liabilities	$752.2M	$755.5M	$756.7M
Total Liabilities	$1.161B	$1.156B	$1.363B
YoY Change	-1.38%	-2.12%	18.26%
SHAREHOLDERS EQUITY
Retained Earnings	$2.028B	$2.023B	$2.024B
YoY Change	3.75%	2.43%	6.18%
Common Stock	$27.90M	$27.90M	$27.90M
YoY Change	0.0%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$692.5M	$670.7M	$628.5M
YoY Change	17.3%	11.49%	3.89%
Treasury Stock Shares	5.952M shares
Shareholders Equity	$1.060B	$1.057B	$1.112B
YoY Change
Total Liabilities & Shareholders Equity	$2.530B	$2.563B	$2.779B
YoY Change	-2.77%	-1.8%	12.67%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	$17.70M	$6.991M	$34.68M
YoY Change	-591.67%	-80.93%	-13.22%
Depreciation, Depletion And Amortization	$20.80M	$20.30M	$20.50M
YoY Change	-3.26%	-3.33%	-1.57%
Cash From Operating Activities	$84.90M	$14.40M	$20.70M
YoY Change	-6630.77%	-55.42%	-11.6%
INVESTING ACTIVITIES
Capital Expenditures	-$23.10M	-$17.10M	-$15.60M
YoY Change	50.0%	42.5%	-210.11%
Acquisitions
YoY Change
Other Investing Activities	-$19.00M	-$120.4M	$62.60M
YoY Change	-343.59%	-2557.14%	3550.15%
Cash From Investing Activities	-$42.00M	-$137.5M	$47.10M
YoY Change	452.63%	1864.29%	-402.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-25.40M	-301.8M	193.8M
YoY Change	154.0%	2747.17%	-6876.22%
NET CHANGE
Cash From Operating Activities	84.90M	14.40M	20.70M
Cash From Investing Activities	-42.00M	-137.5M	47.10M
Cash From Financing Activities	-25.40M	-301.8M	193.8M
Net Change In Cash	17.50M	-424.9M	261.6M
YoY Change	-192.59%	-2990.48%	5159.35%
FREE CASH FLOW
Cash From Operating Activities	$84.90M	$14.40M	$20.70M
Capital Expenditures	-$23.10M	-$17.10M	-$15.60M
Free Cash Flow	$108.0M	$31.50M	$36.30M
YoY Change	665.96%	-28.89%	292.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-28
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000102729
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	8277000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	9548000	USD
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.50
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.50
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.50
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	75000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	75000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	27900000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	27900000	shares
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-501000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	8177000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2710000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-880000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1894000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	384000	USD
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	500000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	500000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019	dei	City Area Code CityAreaCode	402
CY2019	dei	Local Phone Number LocalPhoneNumber	963-1000
CY2019	dei	Security12b Title Security12bTitle	Common Stock $1.00 par value
CY2019	dei	Trading Symbol TradingSymbol	VMI
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	42846	shares
CY2018	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	61208	shares
CY2019	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	60021	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	284574	shares
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	63717	shares
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	119789	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	5951971	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	6356103	shares
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	843278	shares
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	491045	shares
CY2018Q4	vmi	Deferred Compensation Liabilities Noncurrent DeferredCompensationLiabilitiesNoncurrent	37516	USD
CY2019Q4	vmi	Deferred Compensation Liabilities Noncurrent DeferredCompensationLiabilitiesNoncurrent	36290	USD
CY2017	vmi	Length Of Fiscal Year LengthOfFiscalYear	P364D
CY2018	vmi	Length Of Fiscal Year LengthOfFiscalYear	P371D
CY2019	vmi	Length Of Fiscal Year LengthOfFiscalYear	P364D
CY2017	vmi	Treasury Stock Shares Acquired Stock Plan TreasuryStockSharesAcquiredStockPlan	154437	shares
CY2018	vmi	Treasury Stock Shares Acquired Stock Plan TreasuryStockSharesAcquiredStockPlan	27555	shares
CY2019	vmi	Treasury Stock Shares Acquired Stock Plan TreasuryStockSharesAcquiredStockPlan	90868	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-28
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-31429
CY2019	dei	Entity Registrant Name EntityRegistrantName	Valmont Industries, Inc.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	47-0351813
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	One Valmont Plaza,
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Omaha,
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	NE
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	68154-5215
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	237720000	USD
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CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	5960000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-839000	USD
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	21544582	shares
CY2019Q2	dei	Entity Public Float EntityPublicFloat	2908458040	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2766976000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2757144000	USD
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CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2074480000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2098864000	USD
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CY2017	us-gaap	Gross Profit GrossProfit	681768000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	454776000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	440220000	USD
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CY2019	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2018	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	15780000	USD
CY2017	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	267080000	USD
CY2019	us-gaap	Interest Expense InterestExpense	40153000	USD
CY2018	us-gaap	Interest Expense InterestExpense	44237000	USD
CY2017	us-gaap	Interest Expense InterestExpense	44645000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	3942000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	4668000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	4737000	USD
CY2017	us-gaap	Gain Loss On Investments GainLossOnInvestments	3863000	USD
CY2019	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	0	USD
CY2018	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	14820000	USD
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CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2204000	USD
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CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-58839000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-38616000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	209673000	USD
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CY2018	vmi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociOnDerivativesRealizedUponSaleOrLiquidationNetOfTax	-1215000	USD
CY2017	vmi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociOnDerivativesRealizedUponSaleOrLiquidationNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	64000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-423000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-74000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-2467000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	USD
CY2019	vmi	Other Comprehensive Income Loss Net Investment Hedge Gain Loss Reclassificationafter Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationafterTax	2130000	USD
CY2018	vmi	Other Comprehensive Income Loss Net Investment Hedge Gain Loss Reclassificationafter Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationafterTax	-1021000	USD
CY2017	vmi	Other Comprehensive Income Loss Net Investment Hedge Gain Loss Reclassificationafter Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationafterTax	0	USD
CY2019	vmi	Other Comprehensive Income Loss Net Investment Hedge Gain Loss After Reclassificationand Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationandTax	2130000	USD
CY2018	vmi	Other Comprehensive Income Loss Net Investment Hedge Gain Loss After Reclassificationand Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationandTax	-1021000	USD
CY2017	vmi	Other Comprehensive Income Loss Net Investment Hedge Gain Loss After Reclassificationand Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossAfterReclassificationandTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-1815000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-352000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2019	vmi	Other Comprehensive Income Loss Hedging Activities Gainlossafter Reclassificationand Tax OtherComprehensiveIncomeLossHedgingActivitiesGainlossafterReclassificationandTax	2905000	USD
CY2018	vmi	Other Comprehensive Income Loss Hedging Activities Gainlossafter Reclassificationand Tax OtherComprehensiveIncomeLossHedgingActivitiesGainlossafterReclassificationandTax	4814000	USD
CY2017	vmi	Other Comprehensive Income Loss Hedging Activities Gainlossafter Reclassificationand Tax OtherComprehensiveIncomeLossHedgingActivitiesGainlossafterReclassificationandTax	-1621000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	10828000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-29885000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	10871000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-10429000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-21534000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	66787000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	149037000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	78772000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	189106000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5505000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8584000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5529000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	143532000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	70188000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	183577000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	353542000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	313210000	USD
CY2019Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	480000000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	483963000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	374565000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	383566000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	141322000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	112525000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	32043000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	42800000	USD
CY2019Q4	vmi	Income Taxes Receivable And Deferred Tax Assets Liabilities Net Current IncomeTaxesReceivableAndDeferredTaxAssetsLiabilitiesNetCurrent	6947000	USD
CY2018Q4	vmi	Income Taxes Receivable And Deferred Tax Assets Liabilities Net Current IncomeTaxesReceivableAndDeferredTaxAssetsLiabilitiesNetCurrent	4576000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	1388419000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	1340640000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1245261000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1160865000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	687132000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	646873000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	558129000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	513992000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	428864000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	385207000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	175742000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	175956000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	212257000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	114479000	USD
CY2019Q4	us-gaap	Assets Assets	2763411000	USD
CY2018Q4	us-gaap	Assets Assets	2530274000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	760000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	779000	USD
CY2019Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	21774000	USD
CY2018Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	10678000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	197957000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	218115000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	83528000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	79291000	USD
CY2019Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	8079000	USD
CY2018Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	8230000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	201681000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	91942000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	513779000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	409035000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	47955000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	43489000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	764944000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	741822000	USD
CY2019Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	140007000	USD
CY2018Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	143904000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	85817000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2019Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	45114000	USD
CY2018Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	46107000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	8904000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10394000	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	27900000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	27900000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	0	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	0	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2140948000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2027596000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-313422000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-303185000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	743942000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	692549000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1111484000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1059762000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	45407000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	75761000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1156891000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1135523000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2763411000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2530274000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	159466000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	100306000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	122319000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	82264000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	82827000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	84957000	USD
CY2019	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	172000	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	62000	USD
CY2017	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-237000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	18461000	USD
CY2018	us-gaap	Pension Contributions PensionContributions	1537000	USD
CY2017	us-gaap	Pension Contributions PensionContributions	40245000	USD
CY2019	vmi	Vmi Impairment Of Property Plant And Equipment Vmi_ImpairmentOfPropertyPlantAndEquipment	0	USD
CY2018	vmi	Vmi Impairment Of Property Plant And Equipment Vmi_ImpairmentOfPropertyPlantAndEquipment	5000000	USD
CY2017	vmi	Vmi Impairment Of Property Plant And Equipment Vmi_ImpairmentOfPropertyPlantAndEquipment	0	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	15780000	USD
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-6084000	USD
CY2017	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	11587000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	10392000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	10706000	USD
CY2019	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	-513000	USD
CY2018	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	-2251000	USD
CY2017	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	648000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2513000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	225000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3924000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3940000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1659000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39755000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-5408000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-12571000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	49112000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-12313000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	13774000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	57442000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-4413000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	11048000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	6214000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	29274000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	32932000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-176000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-21410000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1486000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	39405000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	108784000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	49000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-1998000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1274000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-10888000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-7228000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-6944000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-4139000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	1108000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	307614000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	153008000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	133148000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	97425000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	71985000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	55266000	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	5556000	USD
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	63103000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	8185000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	81841000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	143020000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5362000	USD
CY2019	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-11184000	USD
CY2018	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	1621000	USD
CY2017	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-5123000	USD
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	6169000	USD
CY2018	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	USD
CY2017	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-545000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1922000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2295000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-168150000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-155445000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-49615000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	11327000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	10543000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-585000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	31000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	251655000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10768000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	262191000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	887000	USD
CY2019	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	0	USD
CY2018	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	2467000	USD
CY2017	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2322000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	32642000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	33726000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	33862000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	7737000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	7055000	USD
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	5674000	USD
CY2019	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	27845000	USD
CY2018	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	5510000	USD
CY2017	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	0	USD
CY2019	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	13619000	USD
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	7357000	USD
CY2017	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	35159000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	62915000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	114805000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	vmi	Payments For Repurchase Of Common Treasury Shares Stock Plan Exercises PaymentsForRepurchaseOfCommonTreasurySharesStockPlanExercises	12989000	USD
CY2018	vmi	Payments For Repurchase Of Common Treasury Shares Stock Plan Exercises PaymentsForRepurchaseOfCommonTreasurySharesStockPlanExercises	3589000	USD
CY2017	vmi	Payments For Repurchase Of Common Treasury Shares Stock Plan Exercises PaymentsForRepurchaseOfCommonTreasurySharesStockPlanExercises	26161000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-98950000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-162110000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32010000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-182000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-15048000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	27682000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	40332000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-179595000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	33426000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	492805000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	7055000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	79205000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	313210000	USD
CY2018	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	5510000	USD
CY2018	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	40783000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	114805000	USD
CY2018	vmi	Treasury Stock Value Acquired Stock Plan Cost Method TreasuryStockValueAcquiredStockPlanCostMethod	3589000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	7357000	USD
CY2018	vmi	Stock Issued During Period Value Stock Options Exercised Tax Benefit StockIssuedDuringPeriodValueStockOptionsExercisedTaxBenefit	4064000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	413600000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	353542000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	313210000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	492805000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	982586000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	122319000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	66787000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	33927000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	5674000	USD
CY2017	vmi	Treasury Stock Value Acquired Stock Plan Cost Method TreasuryStockValueAcquiredStockPlanCostMethod	26161000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	35159000	USD
CY2017	vmi	Stock Issued During Period Value Stock Options Exercised Tax Benefit StockIssuedDuringPeriodValueStockOptionsExercisedTaxBenefit	5137000	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	5569000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1151795000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	100306000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-21534000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	6328000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1135523000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	159466000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-10429000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	32503000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	7737000	USD
CY2019	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	27845000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	62915000	USD
CY2019	vmi	Treasury Stock Value Acquired Stock Plan Cost Method TreasuryStockValueAcquiredStockPlanCostMethod	12989000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	13619000	USD
CY2019	vmi	Stock Issued During Period Value Stock Options Exercised Tax Benefit StockIssuedDuringPeriodValueStockOptionsExercisedTaxBenefit	2772000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	8815000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1156891000	USD
CY2019Q4	us-gaap	Bank Overdrafts BankOverdrafts	13971000	USD
CY2018Q4	us-gaap	Bank Overdrafts BankOverdrafts	8888000	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2019	vmi	Percentage Of Sales To Total Consolidated Sales Of Other Business Activities Aggregated As Other Maximum PercentageOfSalesToTotalConsolidatedSalesOfOtherBusinessActivitiesAggregatedAsOtherMaximum	0.10
CY2019	us-gaap	Fiscal Period FiscalPeriod	<div style="line-height:120%;padding-bottom:16px;text-align:left;padding-left:72px;text-indent:-24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Fiscal Year</span></div><div style="line-height:120%;padding-bottom:16px;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company operates on a </span><span style="font-family:inherit;font-size:10pt;">52</span><span style="font-family:inherit;font-size:10pt;"> or </span><span style="font-family:inherit;font-size:10pt;">53</span><span style="font-family:inherit;font-size:10pt;"> week fiscal year with each year ending on the last Saturday in December. Accordingly, the Company’s fiscal years ended </span><span style="font-family:inherit;font-size:10pt;">December 28, 2019</span><span style="font-family:inherit;font-size:10pt;">, </span><span style="font-family:inherit;font-size:10pt;">December 29, 2018</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">December 30, 2017</span><span style="font-family:inherit;font-size:10pt;"> consisted of 52 weeks. </span></div>
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	9548000	USD
CY2019Q4	us-gaap	Percentage Of Lifo Inventory PercentageOfLIFOInventory	0.41
CY2018Q4	us-gaap	Percentage Of Lifo Inventory PercentageOfLIFOInventory	0.37
CY2019Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	43805000	USD
CY2018Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	53619000	USD
CY2019	us-gaap	Depreciation Depreciation	64177000	USD
CY2018	us-gaap	Depreciation Depreciation	67499000	USD
CY2017	us-gaap	Depreciation Depreciation	69046000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	141322000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	112525000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	117945000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	4906000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	3921000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	5222000	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<span style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates</span><div style="line-height:120%;padding-bottom:16px;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities, the reported amounts of revenue and expenses and the disclosure of contingent assets and liabilities to prepare these financial statements in conformity with generally accepted accounting principles. Actual results could differ from those estimates.</span></div>
CY2014Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000	USD
CY2014Q2	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P12M
CY2015Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	250000000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	5922454	shares
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	795549000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	13900000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	11500000	USD
CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	11600000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	34031000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	10056000	USD
CY2019	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	0	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	10056000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	0	USD
CY2018Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	190115000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	39032000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	43305000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	44528000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	43629000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	47355000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	63791000	USD
CY2019Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	158314000	USD
CY2019Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	38088000	USD
CY2018Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	35566000	USD
CY2019Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	221968000	USD
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	211504000	USD
CY2019Q4	us-gaap	Inventory Gross InventoryGross	418370000	USD
CY2019Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	43805000	USD
CY2018Q4	us-gaap	Inventory Gross InventoryGross	437185000	USD
CY2018Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	53619000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	374565000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	383566000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1245261000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1160865000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	269748000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	163113000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	251141000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	143908000	USD
CY2019Q4	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18087000	USD
CY2018Q4	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15328000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15911000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	17343000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	15298000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	13120000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	11345000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	9434000	USD
CY2018Q4	us-gaap	Goodwill Gross GoodwillGross	434454000	USD
CY2018Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	49247000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	385207000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	42133000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	1524000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	428864000	USD
CY2017Q4	us-gaap	Goodwill Gross GoodwillGross	372612000	USD
CY2017Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	34892000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	337720000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	87119000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	14355000	USD
CY2018	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	15814000	USD
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-9463000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	385207000	USD
CY2019	vmi	Goodwill Impairment Discount Rate GoodwillImpairmentDiscountRate	0.01
CY2019	vmi	Reporting Unit Effectof Changein Discount Rateon Fair Value ReportingUnitEffectofChangeinDiscountRateonFairValue	15000000	USD
CY2018Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	14355000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	175923000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	127852000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	152372000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	33750000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	15589000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	76092000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	209673000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	143441000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	228464000	USD
CY2018	vmi	Tax Cutsand Jobs Act Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsandJobsActIncompleteAccountingProvisionalIncomeTaxExpenseBenefit	41935000	USD
CY2017	vmi	Tax Cutsand Jobs Act Changein Tax Rate Deferred Tax Asset Income Tax Expense TaxCutsandJobsActChangeinTaxRateDeferredTaxAssetIncomeTaxExpense	20372000	USD
CY2018Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	394000000	USD
CY2019Q4	vmi	Tax Cutsand Jobs Act Incomplete Accounting Transition Taxfor Accumulated Foreign Earnings Provisional Liability TaxCutsandJobsActIncompleteAccountingTransitionTaxforAccumulatedForeignEarningsProvisionalLiability	785000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2108000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	213000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-9626000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	553000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	27809000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	21106000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	49324000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5568000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6585000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4415000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	13130000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	17559000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	12880000	USD
CY2019	vmi	Current Federal State Foreign Income Tax Expense Benefit Total CurrentFederalStateForeignIncomeTaxExpenseBenefitTotal	46507000	USD
CY2018	vmi	Current Federal State Foreign Income Tax Expense Benefit Total CurrentFederalStateForeignIncomeTaxExpenseBenefitTotal	45250000	USD
CY2017	vmi	Current Federal State Foreign Income Tax Expense Benefit Total CurrentFederalStateForeignIncomeTaxExpenseBenefitTotal	66619000	USD
CY2019	vmi	Noncurrent Income Tax Expense Benefit Continuing Operations NoncurrentIncomeTaxExpenseBenefitContinuingOperations	-240000	USD
CY2018	vmi	Noncurrent Income Tax Expense Benefit Continuing Operations NoncurrentIncomeTaxExpenseBenefitContinuingOperations	-456000	USD
CY2017	vmi	Noncurrent Income Tax Expense Benefit Continuing Operations NoncurrentIncomeTaxExpenseBenefitContinuingOperations	-229000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	9000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-385000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1279000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1881000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	49766000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3940000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1659000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39755000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50207000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43135000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	106145000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.025
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.035
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.014
CY2019	vmi	Effective Income Tax Rate Reconciliation Carryforwards Credits And Changes In Valuation Allowances EffectiveIncomeTaxRateReconciliationCarryforwardsCreditsAndChangesInValuationAllowances	0.010
CY2018	vmi	Effective Income Tax Rate Reconciliation Carryforwards Credits And Changes In Valuation Allowances EffectiveIncomeTaxRateReconciliationCarryforwardsCreditsAndChangesInValuationAllowances	-0.032
CY2017	vmi	Effective Income Tax Rate Reconciliation Carryforwards Credits And Changes In Valuation Allowances EffectiveIncomeTaxRateReconciliationCarryforwardsCreditsAndChangesInValuationAllowances	0.014
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.003
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.010
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.041
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.003
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.001
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.021
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0.022
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0
CY2019	vmi	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Act Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActPercent	0
CY2018	vmi	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Act Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActPercent	-0.005
CY2017	vmi	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Act Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActPercent	0.184
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.013
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.020
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	137246000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	100905000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.240
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.301
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.465
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	3171000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	6756000	USD
CY2018	vmi	Tax Cutsand Jobs Act Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsandJobsActIncompleteAccountingProvisionalIncomeTaxExpenseBenefit	41935000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	16148000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	8268000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	64116000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	56867000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	35539000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	36328000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	5599000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	3320000	USD
CY2019Q4	vmi	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Accrued Compensationand Benefits DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsAccruedCompensationandBenefits	14122000	USD
CY2018Q4	vmi	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Accrued Compensationand Benefits DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsAccruedCompensationandBenefits	13122000	USD
CY2019Q4	vmi	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	21763000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	15174000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	16228000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	172461000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	134133000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	35215000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	33228000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	31628000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	25477000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	49686000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	44850000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	22066000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	6067000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	7291000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	109447000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	77618000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	27799000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	23287000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	16228000	USD
CY2019Q4	vmi	Deferred Tax Assets Included In Refundable And Deferred Income Taxes DeferredTaxAssetsIncludedInRefundableAndDeferredIncomeTaxes	75754000	USD
CY2018Q4	vmi	Deferred Tax Assets Included In Refundable And Deferred Income Taxes DeferredTaxAssetsIncludedInRefundableAndDeferredIncomeTaxes	66776000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	47955000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	43489000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	27799000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	23287000	USD
CY2019Q4	vmi	Deferred Tax Assets Tax Credit And Net Operating Loss Carryforwards Resulting From Acquisitions DeferredTaxAssetsTaxCreditAndNetOperatingLossCarryforwardsResultingFromAcquisitions	64116000	USD
CY2018Q4	vmi	Deferred Tax Assets Tax Credit And Net Operating Loss Carryforwards Resulting From Acquisitions DeferredTaxAssetsTaxCreditAndNetOperatingLossCarryforwardsResultingFromAcquisitions	56867000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2599000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3196000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	29000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	103000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	199000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	593000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	280000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	150000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	50000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	771000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	731000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2300000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2599000	USD
CY2019Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	685000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	771000	USD
CY2019	vmi	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations Domestic UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitationsDomestic	609000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	731000	USD
CY2018	vmi	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations Domestic UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitationsDomestic	577000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	178000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2536000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	196000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2224000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	742601000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	761000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	765704000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	568000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7786000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	8068000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	760000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	779000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	764944000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	741822000	USD
CY2019Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0273
CY2018Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0327
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	760000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1208223	shares
CY2019Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	488560	shares
CY2019Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	341828	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.23
CY2018	vmi	Earnings Per Share Dilutive Securities Stock Options Per Share EarningsPerShareDilutiveSecuritiesStockOptionsPerShare	-0.03
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.20
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	116240000	USD
CY2017	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	116240000	USD
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	22520000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	218000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	22738000	shares
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.16
CY2017	vmi	Earnings Per Share Dilutive Securities Stock Options Per Share EarningsPerShareDilutiveSecuritiesStockOptionsPerShare	-0.05
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.11
CY2019	vmi	Schedule Of Share Based Compensation Nonvested Stock And Restricted Stock Unit Activity Table Textblock ScheduleOfShareBasedCompensationNonvestedStockAndRestrictedStockUnitActivityTableTextblock	During fiscal <span style="font-family:inherit;font-size:10pt;">2019</span><span style="font-family:inherit;font-size:10pt;">, </span><span style="font-family:inherit;font-size:10pt;">2018</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">2017</span><span style="font-family:inherit;font-size:10pt;">, the Company granted restricted stock units to directors and certain management employees as follows (which are not included in the above stock plan activity tables):</span><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:98.01587301587301%;border-collapse:collapse;text-align:left;"><tr><td colspan="12"/></tr><tr><td style="width:71%;"/><td style="width:1%;"/><td style="width:7%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:7%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:7%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:1px;padding-right:2px;"><div style="text-align:center;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">2019</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:1px;padding-right:2px;"><div style="text-align:center;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">2018</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:1px;padding-right:2px;"><div style="text-align:center;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-weight:bold;">2017</span></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:13px;text-indent:-14px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Shares granted</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>78,318</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>88,127</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>62,160</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:13px;text-indent:-14px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Weighted‑average per share price on grant date</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>145.89</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>114.89</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>163.18</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:13px;text-indent:-14px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Recognized compensation expense</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>8,815</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>6,328</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>5,569</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span>
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	153769000	USD
CY2019	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	153769000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21659000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	110000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21769000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.10
CY2019	vmi	Earnings Per Share Dilutive Securities Stock Options Per Share EarningsPerShareDilutiveSecuritiesStockOptionsPerShare	-0.04
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.06
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	94351000	USD
CY2018	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	94351000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	22306000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	140000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	22446000	shares
CY2019	vmi	Payments For Refinancing Of Long Term Debt PaymentsForRefinancingOfLongTermDebt	11115000	USD
CY2019	vmi	Payments For Refinancing Of Long Term Debt Per Share PaymentsForRefinancingOfLongTermDebtPerShare	0.50
CY2018Q4	vmi	Effective Income Tax Rate Reconciliationat Blended Federal Statutory Income Tax Rate Percent EffectiveIncomeTaxRateReconciliationatBlendedFederalStatutoryIncomeTaxRatePercent	0.250
CY2018Q4	vmi	Tax Cutsand Jobs Act Changein Tax Rate Deferred Tax Asset Income Tax Expense TaxCutsandJobsActChangeinTaxRateDeferredTaxAssetIncomeTaxExpense	20372000	USD
CY2018Q4	vmi	Tax Cutsand Jobs Act Changein Tax Rate Deferred Tax Asset Income Tax Expense Per Share TaxCutsandJobsActChangeinTaxRateDeferredTaxAssetIncomeTaxExpense_Per_Share	0.90
CY2018Q4	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpense	9890000	USD
CY2018Q4	vmi	Tax Cutsand Jobs Actof2017 Incomplete Accounting Transition Taxfor Accumulated Foreign Earnings Provisional Income Tax Expense Per Share TaxCutsandJobsActof2017IncompleteAccountingTransitionTaxforAccumulatedForeignEarningsProvisionalIncomeTaxExpense_per_Share	0.44
CY2018Q4	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	11673000	USD
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	406806	shares
CY2018Q4	vmi	Deferred Foreign Income Tax Expense Benefit Per Share DeferredForeignIncomeTaxExpenseBenefit_per_Share	0.51
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	130704	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	vmi	Defined Contribution Plan Employee Contribution Limit Percentage Of Compensation DefinedContributionPlanEmployeeContributionLimitPercentageOfCompensation	0.50
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	12600000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	12300000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	11800000	USD
CY2019Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	36290000	USD
CY2018Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	37516000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Distribution Paid DeferredCompensationArrangementWithIndividualDistributionPaid	8335000	USD
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Distribution Paid DeferredCompensationArrangementWithIndividualDistributionPaid	2352000	USD
CY2019Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	3247000	USD
CY2018Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	9147000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	1579000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	993000	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-74000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-2467000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	411000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	17008000	USD
CY2017Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	20109000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	17484000	USD
CY2018	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	18920000	USD
CY2019	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	16080000	USD
CY2018	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	13566000	USD
CY2019	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	-2072000	USD
CY2018	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	2253000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	13532000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	17008000	USD
CY2019	vmi	Defined Benefit Plan Percentage Of Salary Retirement Benefits DefinedBenefitPlanPercentageOfSalaryRetirementBenefits	0.0167
CY2019	vmi	Defined Benefit Plan Age For Retirement Benefits DefinedBenefitPlanAgeForRetirementBenefits	P65Y
CY2019	vmi	Active Members Of Defined Benefit Retirement Plan ActiveMembersOfDefinedBenefitRetirementPlan	0
CY2018Q4	us-gaap	Foreign Currency Exchange Rate Translation1 ForeignCurrencyExchangeRateTranslation1	1.269
CY2019Q4	us-gaap	Foreign Currency Exchange Rate Translation1 ForeignCurrencyExchangeRateTranslation1	1.308
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	17878000	USD
CY2018	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-42108000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-140007000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	9500000	GBP
CY2017Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	783301000	USD
CY2017Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	593749000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-189552000	USD
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1537000	USD
CY2018	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	12056000	USD
CY2018	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	-32120000	USD
CY2018	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	28207000	USD
CY2018	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	28207000	USD
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	95480000	USD
CY2018	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	-31423000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	647440000	USD
CY2018Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	503536000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-143904000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	647440000	USD
CY2018Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	503536000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-143904000	USD
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	18461000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	16923000	USD
CY2019	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	86081000	USD
CY2019	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	20769000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	20769000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-79485000	USD
CY2019	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	21324000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	17087000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	744403000	USD
CY2019Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	604396000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-140007000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	-168250000	USD
CY2018Q4	vmi	Defined Benefit Plan Accumulated Other Comprehensive Income Currency Translation Gain Loss Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeCurrencyTranslationGainLossBeforeTax	5358000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	44760000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	-12056000	USD
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0429
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0425
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	-130188000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-10839000	USD
CY2019Q4	vmi	Defined Benefit Plan Accumulated Other Comprehensive Income Currency Translation Gain Loss Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeCurrencyTranslationGainLossBeforeTax	-2699000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	-143726000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Amortization Next Fiscal Year DefinedBenefitPlanExpectedAmortizationNextFiscalYear	3008000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0205
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0290
CY2019Q4	vmi	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Consumer Price Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationConsumerPriceIndexInflationRate	0.0215
CY2018Q4	vmi	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Consumer Price Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationConsumerPriceIndexInflationRate	0.0220
CY2019Q4	vmi	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Retail Prices Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetailPricesIndexInflationRate	0.0305
CY2018Q4	vmi	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Retail Prices Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetailPricesIndexInflationRate	0.0330
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	16923000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	17878000	USD
CY2019	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	20000000	USD
CY2018	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	23175000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	513000	USD
CY2018	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	0	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-2051000	USD
CY2018	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-3046000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-513000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-2251000	USD
CY2019	vmi	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Consumer Price Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostConsumerPriceIndexInflationRate	0.0220
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0290
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0255
CY2018	vmi	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Consumer Price Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostConsumerPriceIndexInflationRate	0.0220
CY2019	vmi	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Retail Price Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRetailPriceIndexInflationRate	0.0330
CY2018	vmi	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Retail Price Index Inflation Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRetailPriceIndexInflationRate	0.0330
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	17132000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	13100000	GBP
CY2019	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	1700000	USD
CY2019	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	1300000	GBP
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	21840000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	22494000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	23148000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	23802000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	24587000	USD
CY2019Q4	vmi	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years After Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsAfterYearFour	134442000	USD
CY2019	vmi	Defined Benefit Plan Weighted Average Maturity Period Of Debt Portfolio DefinedBenefitPlanWeightedAverageMaturityPeriodOfDebtPortfolio	P13Y
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	38388000	USD
CY2019Q4	us-gaap	Alternative Investment AlternativeInvestment	566008000	USD
CY2019Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	604396000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	61546000	USD
CY2018Q4	us-gaap	Alternative Investment AlternativeInvestment	441990000	USD
CY2018Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	503536000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2019	us-gaap	Lease Cost LeaseCost	24073000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	24835000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13474000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.038
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2500000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	2000000	USD
CY2019	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	12063000	USD
CY2019	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	8444000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	209673000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	101043000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	18744000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	15504000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	12706000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	9731000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	8453000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	58015000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	123153000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	22110000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	101043000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	18757000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	16830000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	13992000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	11932000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	8866000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	76438000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	146815000	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2019	vmi	Percentage Of Sales To Total Consolidated Sales Of Other Business Activities Aggregated As Other Maximum PercentageOfSalesToTotalConsolidatedSalesOfOtherBusinessActivitiesAggregatedAsOtherMaximum	0.10
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2766976000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2757144000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2745967000	USD
CY2019Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1374992000	USD
CY2019	vmi	Other Nonoperating Income Expense Including Other Gains Lossesand Costs OtherNonoperatingIncomeExpenseIncludingOtherGainsLossesandCosts	8164000	USD
CY2019Q4	vmi	Investment In Subsidiaries And Intercompany Accounts InvestmentInSubsidiariesAndIntercompanyAccounts	0	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2766976000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2757144000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2745967000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	237720000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	202280000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	267080000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-36211000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-39569000	USD
CY2017	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-39908000	USD
CY2019	vmi	Costs Associated With Refinancing Of Debt CostsAssociatedWithRefinancingOfDebt	0	USD
CY2018	vmi	Costs Associated With Refinancing Of Debt CostsAssociatedWithRefinancingOfDebt	14820000	USD
CY2017	vmi	Costs Associated With Refinancing Of Debt CostsAssociatedWithRefinancingOfDebt	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-6084000	USD
CY2017	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019	vmi	Other Nonoperating Income Expense Including Gain Losson Investments OtherNonoperatingIncomeExpenseIncludingGainLossonInvestments	8164000	USD
CY2018	vmi	Other Nonoperating Income Expense Including Gain Losson Investments OtherNonoperatingIncomeExpenseIncludingGainLossonInvestments	1634000	USD
CY2017	vmi	Other Nonoperating Income Expense Including Gain Losson Investments OtherNonoperatingIncomeExpenseIncludingGainLossonInvestments	1292000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	209673000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	143441000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	228464000	USD
CY2019Q4	us-gaap	Assets Assets	2763411000	USD
CY2018Q4	us-gaap	Assets Assets	2530274000	USD
CY2017Q4	us-gaap	Assets Assets	2602250000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	97425000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	71985000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	55266000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	82264000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	82827000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	84957000	USD
CY2018Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1189634000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5697000	USD
CY2017Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1129685000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-38616000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	153769000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	228464000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5955000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2757144000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2098864000	USD
CY2018	us-gaap	Gross Profit GrossProfit	658280000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	66390000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-28047000	USD
CY2019Q4	vmi	Subsidiary Guarantors Percentage Owned SubsidiaryGuarantorsPercentageOwned	1
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39755000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2766976000	USD
CY2018	vmi	Selling General And Administrative Expenses And Goodwill And Intangible Assets Impairment SellingGeneralAndAdministrativeExpensesAndGoodwillAndIntangibleAssetsImpairment	456000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	202280000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	106145000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2074480000	USD
CY2019	us-gaap	Gross Profit GrossProfit	692496000	USD
CY2019	vmi	Selling General And Administrative Expenses And Goodwill And Intangible Assets Impairment SellingGeneralAndAdministrativeExpensesAndGoodwillAndIntangibleAssetsImpairment	454776000	USD
CY2018	us-gaap	Interest Expense InterestExpense	44237000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	4668000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	237720000	USD
CY2018	vmi	Other Nonoperating Income Expense Including Other Gains Lossesand Costs OtherNonoperatingIncomeExpenseIncludingOtherGainsLossesandCosts	-19270000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-58839000	USD
CY2019	us-gaap	Interest Expense InterestExpense	40153000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	3942000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	143441000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	44794000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1659000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43135000	USD
CY2018	vmi	Income Loss From Continuing Operations Before Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossFromEquityMethodInvestments	100306000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Profit Loss ProfitLoss	100306000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	46267000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3940000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50207000	USD
CY2019	vmi	Income Loss From Continuing Operations Before Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossFromEquityMethodInvestments	159466000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019	us-gaap	Profit Loss ProfitLoss	159466000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	94351000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2745967000	USD
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2064199000	USD
CY2017	us-gaap	Gross Profit GrossProfit	681768000	USD
CY2017	vmi	Selling General And Administrative Expenses And Goodwill And Intangible Assets Impairment SellingGeneralAndAdministrativeExpensesAndGoodwillAndIntangibleAssetsImpairment	414688000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	267080000	USD
CY2017	us-gaap	Interest Expense InterestExpense	44645000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	4737000	USD
CY2017	vmi	Other Nonoperating Income Expense Including Other Gains Lossesand Costs OtherNonoperatingIncomeExpenseIncludingOtherGainsLossesandCosts	1292000	USD
CY2017	vmi	Income Loss From Continuing Operations Before Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossFromEquityMethodInvestments	122319000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	8230000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	212257000	USD
CY2017	us-gaap	Gain Loss On Oil And Gas Hedging Activity GainLossOnOilAndGasHedgingActivity	-1621000	USD
CY2018	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	5510000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	159466000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-2506000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	122319000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6079000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	116240000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	428864000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	10871000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	0	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	91942000	USD
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	79279000	USD
CY2019	us-gaap	Gain Loss On Oil And Gas Hedging Activity GainLossOnOilAndGasHedgingActivity	2905000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	10828000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-10429000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	149037000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5505000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	143532000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	100306000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-65436000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	-9203000	USD
CY2018	us-gaap	Gain Loss On Oil And Gas Hedging Activity GainLossOnOilAndGasHedgingActivity	4814000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-29885000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-21534000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	78772000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8584000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	70188000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	122319000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	66787000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	189106000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5529000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	183577000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	353542000	USD
CY2019Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	480000000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	374565000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	141322000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	32043000	USD
CY2019Q4	vmi	Income Taxes Receivable And Deferred Tax Assets Liabilities Net Current IncomeTaxesReceivableAndDeferredTaxAssetsLiabilitiesNetCurrent	6947000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	1388419000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1245261000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	687132000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	558129000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	112525000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	175742000	USD
CY2019Q4	us-gaap	Assets Assets	2763411000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	760000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	313210000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	483963000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	409035000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	383566000	USD
CY2019Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	21774000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	197957000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	83528000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	201681000	USD
CY2019Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	8079000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	513779000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	47955000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	764944000	USD
CY2019Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	140007000	USD
CY2019Q4	vmi	Other Liabilities Including Lease Liabilities Noncurrent OtherLiabilitiesIncludingLeaseLiabilitiesNoncurrent	139835000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	27900000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	0	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2140948000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-313422000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	743942000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1111484000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	45407000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1156891000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2763411000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	42800000	USD
CY2018Q4	vmi	Income Taxes Receivable And Deferred Tax Assets Liabilities Net Current IncomeTaxesReceivableAndDeferredTaxAssetsLiabilitiesNetCurrent	4576000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	1340640000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1160865000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	646873000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	513992000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	385207000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	175956000	USD
CY2018Q4	vmi	Investment In Subsidiaries And Intercompany Accounts InvestmentInSubsidiariesAndIntercompanyAccounts	0	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	114479000	USD
CY2018Q4	us-gaap	Assets Assets	2530274000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	779000	USD
CY2018Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	10678000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	218115000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	79291000	USD
CY2019	vmi	Networkingcapital Networkingcapital	80234000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	43489000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2513000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10768000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3940000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	32642000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	7737000	USD
CY2019	vmi	Increase Decrease Paymentsof Intercompany Dividends IncreaseDecreasePaymentsofIntercompanyDividends	0	USD
CY2019	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	27845000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	741822000	USD
CY2018Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	143904000	USD
CY2018Q4	vmi	Other Liabilities Including Lease Liabilities Noncurrent OtherLiabilitiesIncludingLeaseLiabilitiesNoncurrent	56501000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	27900000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	0	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2027596000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-303185000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	692549000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1059762000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	75761000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1135523000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2530274000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	159466000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	82264000	USD
CY2019	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	172000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	18461000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	11587000	USD
CY2019	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	-513000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1274000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-6944000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	307614000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	97425000	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	5556000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	81841000	USD
CY2019	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-11184000	USD
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	6169000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-545000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-168150000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	11327000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	31000000	USD
CY2019	vmi	Vmi Proceeds From Repayment Of Intercompany Capital Contribution Vmi_ProceedsFromRepaymentOfIntercompanyCapitalContribution	0	USD
CY2019	vmi	Intercompany Interest On Longterm Note IntercompanyInterestOnLongtermNote	0	USD
CY2019	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	13619000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	62915000	USD
CY2019	vmi	Payments For Repurchase Of Common Treasury Shares Stock Plan Exercises PaymentsForRepurchaseOfCommonTreasurySharesStockPlanExercises	12989000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-98950000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-182000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	40332000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	313210000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	353542000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	100306000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	82827000	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	62000	USD
CY2018	us-gaap	Pension Contributions PensionContributions	1537000	USD
CY2018	vmi	Vmi Impairment Of Property Plant And Equipment Vmi_ImpairmentOfPropertyPlantAndEquipment	5000000	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	15780000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-6084000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	10392000	USD
CY2018	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	-2251000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	225000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1659000	USD
CY2018	vmi	Networkingcapital Networkingcapital	-46620000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-10888000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-4139000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	153008000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	71985000	USD
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	63103000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	143020000	USD
CY2018	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	1621000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1922000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-155445000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	10543000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	251655000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	262191000	USD
CY2018	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	2467000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2322000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	33726000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	7055000	USD
CY2018	vmi	Increase Decrease Paymentsof Intercompany Dividends IncreaseDecreasePaymentsofIntercompanyDividends	0	USD
CY2018	vmi	Vmi Proceeds From Repayment Of Intercompany Capital Contribution Vmi_ProceedsFromRepaymentOfIntercompanyCapitalContribution	0	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	692139000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	165129000	USD
CY2017	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	35159000	USD
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	7357000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	114805000	USD
CY2018	vmi	Payments For Repurchase Of Common Treasury Shares Stock Plan Exercises PaymentsForRepurchaseOfCommonTreasurySharesStockPlanExercises	3589000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-162110000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-15048000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-179595000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	492805000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	313210000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	122319000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	84957000	USD
CY2017	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-237000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	10706000	USD
CY2017	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	648000	USD
CY2017	us-gaap	Pension Contributions PensionContributions	40245000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3924000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39755000	USD
CY2017	vmi	Networkingcapital Networkingcapital	-75185000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-7228000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	1108000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	133148000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	55266000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	8185000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5362000	USD
CY2017	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-5123000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2295000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-49615000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-585000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	887000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	33862000	USD
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	5674000	USD
CY2017	vmi	Increase Decrease Paymentsof Intercompany Dividends IncreaseDecreasePaymentsofIntercompanyDividends	0	USD
CY2017	vmi	Vmi Proceeds From Repayment Of Intercompany Capital Contribution Vmi_ProceedsFromRepaymentOfIntercompanyCapitalContribution	0	USD
CY2017	vmi	Payments For Repurchase Of Common Treasury Shares Stock Plan Exercises PaymentsForRepurchaseOfCommonTreasurySharesStockPlanExercises	26161000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32010000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	27682000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	79205000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	413600000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	492805000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.86
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.85
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	36481000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.67
CY2019Q3	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	146.46
CY2019Q3	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	123.74
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.10
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.06
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2019	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	151.46
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.66
CY2019Q1	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	139.50
CY2019	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	107.43
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	683626000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.50
CY2019Q1	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	107.43
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	700871000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	180414000	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	41397000	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.90
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.90
CY2019Q2	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	136.75
CY2019Q2	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	112.94
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	690340000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	176086000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	40144000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	170867000	USD
CY2019Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	35747000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.67
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.66
CY2019Q4	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	151.46
CY2019Q4	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	123.80
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2766976000	USD
CY2019	us-gaap	Gross Profit GrossProfit	692496000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	153769000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	698684000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	169240000	USD
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	39281000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.74
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.72
CY2018Q1	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	171.55
CY2018Q1	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	140.10
CY2019	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	2543000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4448000	USD
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2018	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	171.55
CY2019	vmi	Valuation Allowancesand Reserves Foreign Currency Translation Adjustments ValuationAllowancesandReservesForeignCurrencyTranslationAdjustments	76000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	1196000	USD
CY2018Q3	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	157.15
CY2019Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	9548000	USD
CY2018Q3	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	135.00
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2018	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	103.01
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	9813000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	697363000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	149701000	USD
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17662000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.50
CY2018Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	682405000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	174999000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	32960000	USD
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.47
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.46
CY2018Q2	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	154.60
CY2018Q2	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	137.90
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	678692000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	164340000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.80
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2018Q4	vmi	Stock Price High End Of Range StockPriceHighEndOfRange	141.38
CY2018Q4	vmi	Stock Price Low End Of Range StockPriceLowEndOfRange	103.01
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2757144000	USD
CY2018	us-gaap	Gross Profit GrossProfit	658280000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	94351000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.23
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.20
CY2018Q3	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	14736000	USD
CY2018Q3	us-gaap	Impairment Effect On Earnings Per Share After Tax ImpairmentEffectOnEarningsPerShareAfterTax	0.66
CY2018Q3	vmi	Payments For Refinancing Of Long Term Debt PaymentsForRefinancingOfLongTermDebt	11115000	USD
CY2018Q3	vmi	Financing Costs Effect Per Share FinancingCostsEffectPerShare	0.50
CY2018Q4	us-gaap	Restructuring And Related Cost Expected Cost Remaining1 RestructuringAndRelatedCostExpectedCostRemaining1	20625000	USD
CY2018	vmi	Restructuring Charges Effect Per Share RestructuringChargesEffectPerShare	0.92
CY2018Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	8277000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	994000	USD
CY2018	vmi	Valuation Allowancesand Reserves Foreign Currency Translation Adjustments ValuationAllowancesandReservesForeignCurrencyTranslationAdjustments	365000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	2165000	USD
CY2018Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	8277000	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	18991000	USD
CY2017	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	2060000	USD
CY2017	vmi	Valuation Allowancesand Reserves Foreign Currency Translation Adjustments ValuationAllowancesandReservesForeignCurrencyTranslationAdjustments	-510000	USD
CY2017	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	11748000	USD
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	9813000	USD

Files In Submission

Name	View Source	Status
0000102729-20-000004-index-headers.html	Edgar Link	pending
0000102729-20-000004-index.html	Edgar Link	pending
0000102729-20-000004.txt	Edgar Link	pending
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ex21subofvalmont2019.htm	Edgar Link	pending
ex23consentofindependentre.htm	Edgar Link	pending
exhibit24powerofattorney20.htm	Edgar Link	pending
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vmi-ex321_20191228x10k.htm	Edgar Link	pending
vmi-ex49_20191228x10k.htm	Edgar Link	pending

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$VMI
VALMONT INDUSTRIES INC Stock $vmi

2018 Q4 Form 10-K Financial Statement

#000010272920000004 Filed on February 26, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$VMI VALMONT INDUSTRIES INC Stock $vmi

2018 Q4 Form 10-K Financial Statement

#000010272920000004 Filed on February 26, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$VMI
VALMONT INDUSTRIES INC Stock $vmi