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Accumulated Other Comprehensive Income (loss) (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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May 31, 2014 | May 31, 2013 | May 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | $ (159,253) | $ (177,893) | $ 6,073
Reclassification adjustments for gains included in net income, net of tax benefit of $586, 633, and 844 in 2014, 2013 and 2012 | 1,220 | (1,953) | 1,043
Other comprehensive income | (3,825) | 40,063 | (235,574)
Deferred taxes | 4,976 | (19,470) | 50,565
Ending Balance | (156,882) | (159,253) | (177,893)
Foreign Currency Translation Adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | (24,428) | (8,517) | 81,346
Other comprehensive income | 9,533 | (15,911) | (89,863)
Ending Balance | (14,895) | (24,428) | (8,517)
Pension And Other Postretirement Benefit Liability Adjustments, Net of Tax |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | (143,555) | (174,174) | (96,705)
Other comprehensive income | (16,418) | 48,100 | (119,189)
Deferred taxes | 6,325 | (17,481) | 41,720
Ending Balance | (153,648) | (143,555) | (174,174)
Unrealized Gain (Loss) On Derivatives, Net of Tax |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | 1,196 | 1,200 | 5,267
Other comprehensive income | (1,215) | 14 | (5,512)
Deferred taxes | 304 | (18) | 1,445
Ending Balance | 285 | 1,196 | 1,200
Unrealized Gain (Loss) On Securities, Net of Tax |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | 7,534 | 3,598 | 16,165
Reclassification adjustments for gains included in net income, net of tax benefit of $586, 633, and 844 in 2014, 2013 and 2012 | 1,220 | (1,953) | 1,043
Other comprehensive income | 4,275 | 7,860 | (21,010)
Deferred taxes | (1,653) | (1,971) | 7,400
Ending Balance | $ 11,376 | $ 7,534 | $ 3,598

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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- Definition Amount before tax of other comprehensive income (loss) attributable to parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 + Details
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- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss). + References No definition available. + Details
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