Components of Net Postretirement Expense (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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May 31, 2014
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May 31, 2013
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May 31, 2012
|
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Postretirement Benefits, U.S. Plans
|
|||
Pension and Other Postretirement Benefits Disclosure [Line Items] | |||
Interest cost on the accumulated obligation | $ 297 | $ 349 | $ 416 |
Prior service (credit) | (153) | (86) | (86) |
Net actuarial (gains) losses | (144) | 16 | (58) |
Net Pension Cost | 279 | 272 | |
Postretirement Benefits, Non-U.S. Plans
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Pension and Other Postretirement Benefits Disclosure [Line Items] | |||
Service cost - Benefits earned during the period | 1,264 | 1,185 | 745 |
Interest cost on the accumulated obligation | 1,225 | 1,188 | 968 |
Net actuarial (gains) losses | 516 | 470 | 72 |
Net Pension Cost | $ 3,005 | $ 2,843 | $ 1,785 |