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Accrued Loss Reserves (Detail) (USD $) In Thousands, unless otherwise specified | May 31, 2013 | May 31, 2012
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Schedule of Accrued Liabilities [Line Items] |  |
Accrued loss reserves - Current | $ 27,591 | $ 28,880
Accrued loss reserves - Noncurrent | 33,502 | 33,731
Accrued product liability reserves |  |
Schedule of Accrued Liabilities [Line Items] |  |
Accrued loss reserves - Current | 15,582 | 11,736
Accrued loss reserves - Noncurrent | 29,489 | 28,592
Accrued warranty reserves |  |
Schedule of Accrued Liabilities [Line Items] |  |
Accrued loss reserves - Current | 8,591 | 13,564
Accrued loss reserves - Noncurrent | 739 | 1,187
Environmental Reserves |  |
Schedule of Accrued Liabilities [Line Items] |  |
Accrued loss reserves - Current | 3,418 | 3,580
Accrued loss reserves - Noncurrent | $ 3,274 | $ 3,952

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- Definition The portion of the carrying amount as of the balance sheet date of the combined total of loss contingency liabilities which is expected to be resolved within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The portion of the carrying amount as of the balance sheet date of the combined total of loss contingency liabilities which is expected to be resolved after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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