Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $)	9 Months Ended
Feb. 28, 2013
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Losses in accumulated other comprehensive income expected to be reclassified into net earnings	$ 1,203,000
Losses in accumulated other comprehensive income expected to be reclassified into net earnings, tax	$ 700,000

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