Acquisitions (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jan. 31, 2016
Jul. 31, 2015
Jan. 31, 2015
Oct. 31, 2014
Jan. 31, 2016
Jan. 31, 2015
Jan. 19, 2016
Jun. 30, 2015
Sep. 11, 2014
Business Acquisition, Pro Forma Revenue     $ 530,678     $ 703,254      
Payments to Acquire Businesses, Net of Cash Acquired         $ 20,245 182,500      
Long-term Debt $ 695,535 $ 816,830 635,935   695,535 635,935      
Business Acquisition, Pro Forma Net Income (Loss)     $ 111,850     $ 57,624      
Business Acquisition, Pro Forma Earnings Per Share, Basic     $ 3.08     $ 1.59      
Gain (Loss) Related to Litigation Settlement $ 0   $ 0   0 $ 16,400      
Park City litigation payment to Talisker         $ 0 $ (10,000)      
Business Acquisition, Pro Forma Earnings Per Share, Diluted     $ 2.99     $ 1.54      
Wilmot [Member]                  
Business Acquisition, Effective Date of Acquisition Jan. 19, 2016                
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 10 years                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment             $ 12,500    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill             400    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets             200    
Goodwill, Acquired During Period $ 7,500                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable             $ 400    
PCMR [Member]                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables                 $ 930
Business Acquisition, Effective Date of Acquisition       Sep. 11, 2014          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life       46 years          
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual     $ 27,600     $ 28,400      
Business Combination, Consideration Transferred       $ 182,500          
Gain (Loss) Related to Litigation Settlement       16,400          
Fair value of litigation settlement       10,100          
Business Combination, Consideration Transferred, Other       26,500          
Park City litigation payment to Talisker       10,000          
Business Acquisition, Transaction Costs           800      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment                 76,605
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                 27,650
Goodwill, Acquired During Period       $ 92,516          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets                 215,204
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable                 1,935
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue                 4,319
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities                 $ 6,254
Perisher [Member]                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables               $ 1,494  
Business Acquisition, Effective Date of Acquisition         Jun. 30, 2015        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life   4 years              
Lease Expiration Date         Jan. 01, 2048        
Optional Lease Renewal Term         20-year renewal option        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory               4,859  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment               126,287  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill               5,458  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets               525  
Goodwill, Acquired During Period   $ 31,657              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets               170,280  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable               11,394  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue               15,906  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent               18,429  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities               $ 45,729  
Canyons Obligation [Member]                  
Long-term Debt $ 320,277 $ 317,455 $ 314,657   $ 320,277 $ 314,657