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Acquisitions (Narrative) (Details) (USD $)
 6 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Feb. 29, 2012
Skiinfo [Member]
Jan. 30, 2012
Skiinfo [Member]
Apr. 30, 2012
Kirkwood Mountain Resort [Member]
Apr. 11, 2012
Kirkwood Mountain Resort [Member]
Dec. 31, 2012
Urban Ski Areas [Member]
Dec. 17, 2012
Urban Ski Areas [Member]
Effective date of business acquisition     Feb. 01, 2012   Apr. 12, 2012   Dec. 17, 2012  
Purchase price allocation to goodwill       $ 1,800,000       $ 1,800,000
Purchase price allocation to indefinite-lived intangible assets       700,000   800,000    
Purchase price allocation to fixed assets       2,400,000   16,800,000   17,800,000
Purchase price allocation to other assets       2,700,000   2,500,000   1,000,000
Purchase price allocation to amortizable intangible assets       500,000   1,200,000   1,200,000
Weighted-average amortization period (in years)     6 years 8 months 12 days   21 years 6 months 16 days   5 years  
Purchase price allocation to liabilities assumed       2,600,000   3,100,000   1,800,000
Payments to Acquire Businesses, Net of Cash Acquired $ 19,958,000 $ (342,000) $ 5,700,000   $ 18,200,000   $ 20,000,000