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Accumulated Other Comprehensive Income - Related Tax Effects Allocated to Each Component of Other Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Aug. 31, 2015 | Aug. 31, 2014
Components Of Other Comprehensive Income Loss [Line Items] |  |
Foreign currency translation adjustments, Gross Amount | $ (3,977) | $ (1,524)
Foreign currency translation adjustments, Tax Effect | 1,281 | 115
Foreign currency translation adjustments, Net Amount | (2,696) | (1,409)
Foreign currency hedge, Gross Amount | (238) | 597
Foreign currency hedge, Tax Effect | 91 | (232)
Foreign currency hedge, Net Amount | (147) | 365
Other Comprehensive Income (Loss), before Tax, Total | (4,215) | (927)
Total other comprehensive income, Tax Effect | 1,372 | (117)
Total other comprehensive income, Net Amount | $ (2,843) | $ (1,044)

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- Definition Amount before tax, after reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669625-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33775-111570 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669619-108580 + Details
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- Definition Amount before tax, after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 + Details
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