Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Aug. 31, 2017	May 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Impact to fair value of derivative assets and liabilities as a result of recognition on a net basis	$ 42	$ 100
Losses in accumulated other comprehensive income expected to be reclassified into net earnings	5,666
Losses in accumulated other comprehensive income expected to be reclassified into net earnings, tax	$ 3,425

The estimated tax effect of the value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

No definition available.

Name:	wor_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferredTax
Namespace Prefix:	wor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration