Noncontrolling Interests (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Feb. 28, 2013	May 31, 2013
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 144,422	$ 0
Net income attributable to redeemable noncontrolling interest	1,814
Foreign currency translation adjustment	573
Decrease in the maximum redemption amount of redeemable noncontrolling interest	(817)
Derecognition of redeemable noncontrolling interest	(145,992)
Ending balance		$ 0

Carrying amount, attributable to noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

No definition available.

Name:	us-gaap_TemporaryEquityCarryingAmountAttributableToNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant