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Property, Plant and Equipment - Additional Information (Detail) (USD $) | 12 Months Ended | 3 Months Ended
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May 31, 2014 | May 31, 2013 | May 31, 2013 Idle Housing Facility [Member] Facility | Nov. 30, 2012 Recreational Vehicles [Member] Facility | Aug. 31, 2013 Fair Haven, Vermont [Member] Idle Housing Facility [Member] Facility | Feb. 28, 2014 Halstead Kansas [Member] Idle Housing Facility [Member] Facility | May 31, 2014 Elkhart Indiana [Member] Undeveloped Land [Member] Facility | Nov. 30, 2013 Hemet California [Member] Facility | Nov. 30, 2012 Hemet California [Member] Recreational Vehicles [Member] | May 31, 2013 Mocksville North Carolina [Member] Idle Housing Facility [Member]
Gain (Loss) on Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Number of idle facilities sold |  |  | 1 | 2 | 1 | 1 | 1 | 2 |  |
Gain on the sale of idle facilities | $ 706,000 | $ 1,641,000 |  |  | $ 162,000 | $ 300,000 | $ 244,000 |  | $ 1,411,000 | $ 230,000

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- Definition Number of idle facilities sold. + References No definition available. + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Details
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