Subsequent Events	3 Months Ended
Aug. 31, 2012
Subsequent Events [Abstract]
Subsequent Events	Note 14: Subsequent Events On September 3, 2012 our Board of Directors declared a quarterly cash dividend of $0.20 per common share. The dividend will be paid on October 10, 2012 to shareholders of record as of September 20, 2012.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

No definition available.

Name:	us-gaap_SubsequentEventsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration