Major Classes of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2012		May 31, 2012
Schedule Of Inventory [Line Items]
Raw material and supplies	$ 193,627		$ 160,869
Finished goods	352,051		329,109
Total Inventory	$ 545,678	[1]	$ 489,978

[1] Restated