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Stock Option Activity (Parenthetical) (Detail) In Thousands, unless otherwise specified | May 31, 2014 | May 31, 2013 | May 31, 2012 | May 31, 2011
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Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Shares Outstanding, Exercisable Beginning Balance | 577 | 749 | 863 | 764

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Details
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