Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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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.

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Components of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended				6 Months Ended
	Jan. 05, 2015	May 01, 2014	Oct. 31, 2013	Aug. 30, 2013	Jan. 31, 2015	Jul. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Cost					$ 182,102	$ 162,422
Accumulated Amortization					49,625	42,639
Dealer Networks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years	12 years	12 years	12 years	8 years	9 years
Cost					105,260	90,760
Accumulated Amortization					32,137	27,102
Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years		5 years		2 years	2 years
Cost					4,710	4,710
Accumulated Amortization					3,773	3,283
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years	20 years	20 years	20 years	20 years	20 years
Cost					49,282	43,882
Accumulated Amortization					6,438	5,479
Design Technology And Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life in Years					10 years
Cost					22,850	23,070
Accumulated Amortization					$ 7,277	$ 6,775