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STOCKHOLDERS' EQUITY (Additional Information) (Details) | 9 Months Ended
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Feb. 28, 2016 $ / shares
Stockholders' Equity Note [Abstract] |
Dividends declared per common share (in dollars per share) | $ 0.75

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
Period Type: | duration