Earnings (Loss) Per Share (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	48 Months Ended
Aug. 31, 2014	Aug. 31, 2014
Earnings Per Share [Abstract]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 13.4	$ 13.4

Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration