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Acquisitions (Narrative) (Details) (USD $)
 3 Months Ended 3 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Jul. 31, 2014
Oct. 31, 2014
PCMR [Member]
Oct. 31, 2013
PCMR [Member]
Sep. 11, 2014
PCMR [Member]
Oct. 31, 2014
Canyons Obligation [Member]
Jul. 31, 2014
Canyons Obligation [Member]
Oct. 31, 2013
Canyons Obligation [Member]
Business Acquisition, Pro Forma Revenue       $ 130,298,000 $ 126,192,000        
Effective date of business acquisition       Sep. 11, 2014          
Business Acquisition, Purchase Price Allocation, Goodwill           78,857,000      
Payments to Acquire Businesses, Net of Cash Acquired 182,500,000 0              
Long-term Debt 820,260,000 798,065,000 626,622,000       313,258,000 311,858,000 307,706,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life       46 years          
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual       800,000          
Business Acquisition, Pro Forma Net Income (Loss)       (64,267,000) (76,898,000)        
Business Acquisition, Pro Forma Earnings Per Share, Basic       $ (1.77) $ (2.13)        
Business Combination, Consideration Transferred       182,500,000          
Gain (Loss) Related to Litigation Settlement 16,400,000 0   16,400,000          
Fair value of litigation settlement       10,100,000          
Business Combination, Consideration Transferred, Other       26,500,000          
Park City litigation payment to Talisker (10,000,000) 0   10,000,000          
Business Acquisition, Transaction Costs       $ 900,000