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Debt and Receivables Securitization - Additional Information (Detail) (USD $)
0 Months Ended 6 Months Ended 0 Months Ended
Oct. 15, 2014
Nov. 30, 2014
Sep. 26, 2014
Debt And Receivables Securitization [Line Items]      
Remaining borrowing capacity   $ 413,268,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity  
Interest Rate Swap      
Debt And Receivables Securitization [Line Items]      
Borrowings outstanding 19,406,000us-gaap_LineOfCredit
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
   
Interest rate swap, interest rate 2.015%us-gaap_DerivativeSwaptionInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
   
Interest rate swap, start date Dec. 26, 2014    
Interest rate swap, maturity date Sep. 26, 2019    
Worthington Aritas      
Debt And Receivables Securitization [Line Items]      
Borrowings outstanding   4,095,000us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= wor_WorthingtonAritasMember
 
Maturity date   2015-03  
Debt, Interest rate   5.60%us-gaap_ShortTermDebtPercentageBearingFixedInterestRate
/ dei_LegalEntityAxis
= wor_WorthingtonAritasMember
 
Worthington Nitin Cylinders      
Debt And Receivables Securitization [Line Items]      
Maximum borrowing capacity   9,500,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= wor_WorthingtonNitinCylindersLimitedMember
 
Borrowings outstanding   6,674,000us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= wor_WorthingtonNitinCylindersLimitedMember
 
Applicable variable rate   8.54%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ dei_LegalEntityAxis
= wor_WorthingtonNitinCylindersLimitedMember
 
Maturity date   2014-11  
Securities Sold under Agreements to Repurchase      
Debt And Receivables Securitization [Line Items]      
Maximum borrowing capacity   100,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember
 
Borrowings outstanding   0us-gaap_LineOfCredit
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseMember
 
Maturity date   2015-01  
Number of days past due trade accounts receivables are ineligible for securitization   90 days  
Financial Stand-By Letters Of Credit      
Debt And Receivables Securitization [Line Items]      
Outstanding stand-by letters of credit amount for third-party beneficiaries   13,998,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
 
Draws On Credit Facility      
Debt And Receivables Securitization [Line Items]      
Outstanding stand-by letters of credit amount for third-party beneficiaries   11,732,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= wor_DrawsOnCreditFacilityMember
 
Worthington Aritas      
Debt And Receivables Securitization [Line Items]      
Maximum borrowing capacity     32,344,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_BusinessAcquisitionAxis
= wor_WorthingtonAritasMember
Term loan credit facility, term     5 years
Borrowings outstanding   19,745,000us-gaap_LineOfCredit
/ us-gaap_BusinessAcquisitionAxis
= wor_WorthingtonAritasMember
 
Remaining borrowing capacity   12,599,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_BusinessAcquisitionAxis
= wor_WorthingtonAritasMember
 
Applicable variable rate   1.582%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_BusinessAcquisitionAxis
= wor_WorthingtonAritasMember
 
Unsecured Revolving Credit Facility      
Debt And Receivables Securitization [Line Items]      
Maximum borrowing capacity   425,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
 
Borrowings outstanding   $ 0us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
 
Maturity date   2017-05  
Maximum | Line of Credit      
Debt And Receivables Securitization [Line Items]      
Debt maturity period   1 year