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Acquisitions - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 12 Months Ended | 0 Months Ended |  | 0 Months Ended | 3 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  |  | 0 Months Ended | 12 Months Ended |  |  |  |  |  | 0 Months Ended | 12 Months Ended |  |  |  |  |  | 0 Months Ended | 12 Months Ended |  |  | 0 Months Ended | 12 Months Ended |  |  |  |  | 0 Months Ended | 12 Months Ended |
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Oct. 31, 2013 | Aug. 30, 2013 | Jul. 31, 2014 | Jul. 31, 2013 | Jul. 31, 2012 | May 01, 2014 K.Z. Inc. | May 01, 2014 K.Z. Inc. | Oct. 31, 2013 Bison | Apr. 30, 2014 Bison | Oct. 31, 2013 Bison | Aug. 30, 2013 Livin' Lite | Aug. 30, 2013 Livin' Lite | Dec. 20, 2012 Buses | Oct. 03, 2012 Buses | Dec. 20, 2012 Buses | Oct. 03, 2012 Buses | May 01, 2014 Dealer Networks | Oct. 31, 2013 Dealer Networks | Aug. 30, 2013 Dealer Networks | Jul. 31, 2014 Dealer Networks | May 01, 2014 Dealer Networks K.Z. Inc. | Oct. 31, 2013 Dealer Networks Bison | Aug. 30, 2013 Dealer Networks Livin' Lite | Dec. 20, 2012 Dealer Networks Buses | Oct. 03, 2012 Dealer Networks Buses | May 01, 2014 Trademarks | Oct. 31, 2013 Trademarks | Aug. 30, 2013 Trademarks | Jul. 31, 2014 Trademarks | May 01, 2014 Trademarks K.Z. Inc. | Oct. 31, 2013 Trademarks Bison | Aug. 30, 2013 Trademarks Livin' Lite | Dec. 20, 2012 Trademarks Buses | Oct. 03, 2012 Trademarks Buses | May 01, 2014 Non-Compete Agreements | Aug. 30, 2013 Non-Compete Agreements | Jul. 31, 2014 Non-Compete Agreements | May 01, 2014 Non-Compete Agreements K.Z. Inc. | Aug. 30, 2013 Non-Compete Agreements Livin' Lite | May 01, 2014 Backlog | Oct. 31, 2013 Backlog | Aug. 30, 2013 Backlog | Jul. 31, 2014 Backlog | May 01, 2014 Backlog K.Z. Inc. | Oct. 31, 2013 Backlog Bison | Aug. 30, 2013 Backlog Livin' Lite | Dec. 20, 2012 Backlog Buses | Aug. 30, 2013 Design Technology Assets | Jul. 31, 2014 Design Technology Assets | Aug. 30, 2013 Design Technology Assets Livin' Lite
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  |  |  |  | $ 53,405 |  | $ 16,718 | $ 16,914 |  |  |  | $ 6,804 | $ 3,914 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price adjustment |  |  |  |  |  | 2,915 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset purchase agreement date |  |  |  |  |  | May 01, 2014 |  | Oct. 31, 2013 |  |  | Aug. 30, 2013 |  |  | Oct. 03, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortizable intangible assets, weighted average useful life | 13 years 3 months 18 days | 10 years 2 months 12 days |  |  |  | 13 years 10 months 24 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 years | 12 years | 8 years | 9 years |  |  |  |  |  | 20 years | 20 years | 20 years | 21 years |  |  |  |  |  | 5 years | 2 years | 2 years |  |  | 2 months | 42 days | 42 days |  |  |  |  |  | 5 years |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accelerated basis |  |  |  |  |  |  |  |  | Straight line basis |  |  |  |  |  |  |  | Straight line basis |  |  |  |  |  | Straight line basis |  |  |  |  |  | Straight line basis |
Additional cash payment |  |  |  |  |  |  |  |  | 196 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment to acquire business, net |  |  | 86,092 | 10,718 | 170 | 55,324 |  |  |  |  | 16,769 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition allocated to inventory |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 804 | 915 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition allocated to property and equipment |  |  |  |  |  |  | 15,057 |  |  | 625 |  | 137 |  |  | 630 | 331 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition allocated to Certain liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 225 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition allocated to goodwill |  |  | 256,579 | 238,103 | 245,209 |  | 2,703 |  |  | 6,660 |  | 9,113 |  |  | 4,495 | 768 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition allocated to amortizing intangible asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,160 | $ 7,400 | $ 3,200 | $ 410 | $ 900 |  |  |  |  | $ 5,540 | $ 1,800 | $ 1,500 | $ 670 | $ 1,000 |  |  |  | $ 450 | $ 130 |  |  |  |  | $ 420 | $ 140 | $ 110 | $ 20 |  |  | $ 1,100

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition The amount of inventory recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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- Definition The amortization method of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company. The straight-line method is the preferred amortization method, unless another method better reflects the pattern in which the asset is consumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 35 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=26713198&loc=d3e15372-109273 + 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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- 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 The cash outflow associated with other payments to acquire businesses including deposit on pending acquisitions and preacquisition costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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