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Acquisitions (Narrative) (Details) (USD $)
 9 Months Ended 0 Months Ended
Apr. 30, 2012
Y
Oct. 25, 2010
Booth Creek Resort Properties LLC [Member]
Feb. 02, 2012
Skiinfo [Member]
Jan. 31, 2012
Skiinfo [Member]
Y
Apr. 12, 2012
Kirkwood Mountain Resort [Member]
Y
Business Acquisition [Line Items]          
Effective date of business acquisition   October 25, 2010 February 1, 2012   April 12, 2012
Membership interest   100.00%      
Total consideration paid for the acquisition $ 60,186,000     $ 5,700,000 $ 18,200,000
Weighted-average amortization period (in years) 4.6     6.7 15.8
Purchase price allocation to liabilities assumed 58,244,000     2,300,000 2,700,000
Purchase price allocation to goodwill 85,446,000     1,600,000  
Purchase price allocation to indefinite-lived intangible assets       700,000 1,000,000
Purchase price allocation to accounts receivable 2,499,000        
Purchase price allocation to property, plant and equipment       2,400,000 14,800,000
Purchase price allocation to amortizable intangible assets       500,000 2,200,000
Purchase price allocation to other assets $ 1,422,000     $ 2,600,000 $ 2,900,000