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Other Expense (Income), Net (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2012 | Aug. 31, 2012 | Nov. 30, 2012 | May 31, 2013 | May 31, 2012 | May 31, 2011
Component of Other Income, Nonoperating [Line Items] |  |  |  |  |  |
Royalty (income), net |  |  |  | $ (2,069) | $ (1,520) | $ (1,249)
Loss on Brazil operational repositioning |  |  |  | 6,087 |  |
Loss on Kemrock conversion option | (800) | (8,200) | (9,000) | 9,030 |  |
(Income) loss related to unconsolidated equity affiliates |  |  |  | 44,671 | (8,079) | (1,148)
Other expense (income), net |  |  |  | $ 57,719 | $ (9,599) | $ (2,397)

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