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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended
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Jun. 30, 2016 | May 01, 2015 | Jan. 05, 2015 | May 01, 2014 | Oct. 31, 2013 | Aug. 30, 2013 | Jul. 31, 2015 | Apr. 30, 2014 | Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Borrowings on revolving credit facility |  |  |  |  |  |  |  |  | $ 360,000 |  |
Payment to acquire business, net |  |  |  |  |  |  |  |  | $ 557,651 | $ 194,486 | $ 86,092
Postle Operating, LLC |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset purchase agreement date |  |  |  |  |  |  |  |  |  | May 01, 2015 |
Asset purchase effective date |  |  |  |  |  |  |  |  | May 01, 2015 |  |
Amortizable intangible assets, weighted average useful life |  | 12 years 3 months 18 days |  |  |  |  |  |  |  |  |
Payment to acquire business, net |  | $ 144,048 |  |  |  |  |  |  |  |  |
Cash on hand at the acquisition date |  | $ 2,963 |  |  |  |  |  |  |  |  |
Cruiser RV, LLC and DRV, LLC |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  | $ 47,412 |  |  |  |  |  |  |  |
Asset purchase agreement date |  |  | Dec. 31, 2014 |  |  |  |  |  |  |  |
Purchase price adjustment |  |  |  |  |  |  | $ 1,173 |  |  |  |
Amortizable intangible assets, weighted average useful life |  |  | 13 years 10 months 24 days |  |  |  |  |  |  |  |
Payment to acquire business, net |  |  | $ 47,523 |  |  |  | 47,523 |  |  |  |
Cash on hand at the acquisition date |  |  | $ 1,062 |  |  |  | $ 1,062 |  |  | $ 1,062 |
K.Z. Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  |  | $ 53,405 |  |  |  |  |  |  |
Asset purchase agreement date |  |  |  | May 01, 2014 |  |  |  |  |  |  |
Purchase price adjustment |  |  |  | $ 2,915 |  |  |  |  |  |  |
Amortizable intangible assets, weighted average useful life |  |  |  | 13 years 10 months 24 days |  |  |  |  |  |  |
Payment to acquire business, net |  |  |  | $ 55,324 |  |  |  |  |  |  |
Cash on hand at the acquisition date |  |  |  | $ 996 |  |  |  |  |  |  |
Bison |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  |  |  | $ 16,718 |  |  | $ 16,914 |  |  |
Asset purchase agreement date |  |  |  |  | Oct. 31, 2013 |  |  |  |  |  |
Amortizable intangible assets, weighted average useful life |  |  |  |  | 13 years 3 months 18 days |  |  |  |  |  |
Additional cash payment |  |  |  |  |  |  |  | $ 196 |  |  |
Livin' Lite |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset purchase agreement date |  |  |  |  |  | Aug. 30, 2013 |  |  |  |  |
Amortizable intangible assets, weighted average useful life |  |  |  |  |  | 10 years 2 months 12 days |  |  |  |  |
Payment to acquire business, net |  |  |  |  |  | $ 16,769 |  |  |  |  |
Cash on hand at the acquisition date |  |  |  |  |  | $ 247 |  |  |  |  |
Jayco, Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment to acquire business | $ 576,060 |  |  |  |  |  |  |  |  |  |
Asset purchase agreement date | Jun. 30, 2016 |  |  |  |  |  |  |  |  |  |
Asset purchase effective date | Jun. 30, 2016 |  |  |  |  |  |  |  |  |  |
Purchase price adjustment | $ 5,039 |  |  |  |  |  |  |  |  |  |
Amortizable intangible assets, weighted average useful life | 19 years 3 months 18 days |  |  |  |  |  |  |  |  |  |
Payment to acquire business, net | $ 562,690 |  |  |  |  |  |  |  |  |  |
Cash on hand at the acquisition date | 18,409 |  |  |  |  |  |  |  |  |  |
Jayco, Inc. | Consideration Funded By Credit Facility |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Borrowings on revolving credit facility | $ 360,000 |  |  |  |  |  |  |  |  |  |
Customer Relationships |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  | 12 years |  |  |  |  |  |  |  |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Accelerated cash flow basis |  |
Trademarks |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  | 15 years | 20 years | 20 years | 20 years | 20 years |  |  | 19 years |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Straight-line basis |  |
Trademarks | Jayco, Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period | 20 years |  |  |  |  |  |  |  |  |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Straight-line basis |  |
Backlog |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  | 42 days | 42 days | 2 months | 42 days | 42 days |  |  | 2 months 12 days |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Straight-line basis |  |
Backlog | Jayco, Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period | 3 months |  |  |  |  |  |  |  |  |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Straight-line basis |  |
Dealer Networks |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  |  | 12 years | 12 years | 12 years | 8 years |  |  |  |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Accelerated cash flow basis |  |
Dealer Networks | Jayco, Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period | 20 years |  |  |  |  |  |  |  |  |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Accelerated cash flow basis |  |
Non-Compete Agreements |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  | 5 years |  | 2 years |  |  | 3 years |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Straight-line basis |  |
Design Technology Assets |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets amortization period |  |  |  |  |  | 5 years |  |  |  |  |
Amortizable intangible assets, amortization method |  |  |  |  |  |  |  |  | Straight-line basis |  |

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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=66006027&loc=d3e16265-109275 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + 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=73530397&loc=d3e4845-128472 + Details
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