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Components of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Oct. 31, 2013 | Aug. 30, 2013 | Jan. 31, 2014 | Jul. 31, 2013
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Cost |  |  | $ 142,852 | $ 127,472
Accumulated Amortization |  |  | 35,783 | 29,719
Dealer Networks |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Remaining Life in Years | 12 years | 8 years | 9 years |
Cost |  |  | 77,600 | 67,000
Accumulated Amortization |  |  | 22,873 | 19,121
Non-Compete Agreements |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Remaining Life in Years |  | 2 years | 2 years |
Cost |  |  | 4,260 | 4,130
Accumulated Amortization |  |  | 2,815 | 2,375
Trademarks |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Remaining Life in Years | 20 years | 20 years | 21 years |
Cost |  |  | 38,342 | 35,042
Accumulated Amortization |  |  | 4,612 | 3,843
Design Technology And Other Intangibles |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted Average Remaining Life in Years |  |  | 11 years |
Cost |  |  | 22,650 | 21,300
Accumulated Amortization |  |  | $ 5,483 | $ 4,380

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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