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Property, Plant and Equipment - Additional Information (Detail) (USD $)	12 Months Ended		3 Months Ended
	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.

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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

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