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Summary of Components of Net Balance (Detail) (USD $) In Thousands, unless otherwise specified | Jul. 31, 2014 | Jul. 31, 2013 | Jul. 31, 2012
--- | --- | --- | ---
Goodwill [Line Items] |  |  |
Goodwill | $ 273,831 |  | $ 262,461
Accumulated impairment charges | (17,252) |  | (17,252)
Goodwill, Ending Balance | 256,579 | 238,103 | 245,209
Towables |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 256,579 |  | 238,103
Goodwill, Ending Balance | 256,579 | 238,103 | 238,103
Motorized |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 17,252 |  | 17,252
Accumulated impairment charges | $ (17,252) |  | $ (17,252)

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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