Income Taxes - Additional Information (Detail)	9 Months Ended
Feb. 28, 2013	Feb. 29, 2012
Income Taxes [Line Items]
Effective annual income tax rate	31.80%	31.90%

The entity's estimated annual effective income tax rate.

No definition available.

Name:	wor_EstimatedAnnualEffectiveTaxRate
Namespace Prefix:	wor_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration