Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands							3 Months Ended		12 Months Ended
	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