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Components of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
May 01, 2015 | Jan. 05, 2015 | May 01, 2014 | Oct. 31, 2013 | Aug. 30, 2013 | Jul. 31, 2016 | Jul. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Cost |  |  |  |  |  | $ 588,327 | $ 226,252
Accumulated Amortization |  |  |  |  |  | $ 80,936 | 57,234
Dealer Network/Customer Relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Weighted Average Years Remaining Life |  |  |  |  |  | 16 years |
Cost |  |  |  |  |  | $ 404,960 | 143,860
Accumulated Amortization |  |  |  |  |  | $ 55,191 | 37,194
Trademarks |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Weighted Average Years Remaining Life | 15 years | 20 years | 20 years | 20 years | 20 years | 19 years |
Cost |  |  |  |  |  | $ 148,117 | 55,282
Accumulated Amortization |  |  |  |  |  | $ 10,539 | 7,608
Design Technology And Other Intangibles |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Weighted Average Years Remaining Life |  |  |  |  |  | 9 years |
Cost |  |  |  |  |  | $ 22,400 | 22,400
Accumulated Amortization |  |  |  |  |  | $ 10,870 | 8,168
Non-Compete Agreements |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Weighted Average Years Remaining Life |  |  | 5 years |  | 2 years | 3 years |
Cost |  |  |  |  |  | $ 450 | 4,710
Accumulated Amortization |  |  |  |  |  | $ 203 | $ 4,264
Backlog |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Weighted Average Years Remaining Life | 42 days | 42 days | 2 months | 42 days | 42 days | 2 months 12 days |
Cost |  |  |  |  |  | $ 12,400 |
Accumulated Amortization |  |  |  |  |  | $ 4,133 |

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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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- 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=66006027&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=66006027&loc=d3e16323-109275 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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