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Basis of Presentation (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2013	May 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 19,747	$ 19,138
Work in process	16,782	13,052
Finished goods	210,428	219,015
Inventories, net	$ 246,957	$ 251,205

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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