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Acquisitions (Summary Of Estimate Of Fair Value Of Identifiable Assets Acquired And Liabilities Assumed) (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jan. 31, 2014
Jan. 31, 2013
May 29, 2013
Business Acquisition [Line Items]      
Deferred income tax assets, net     $ 44,744
Goodwill     74,539
Total identifiable assets acquired     344,683
Deferred revenue     1,134
Total liabilities assumed     344,683
Payments to Acquire Businesses, Net of Cash Acquired 0 19,958  
Accounts receivable, net     1,774
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets     1,766
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment     5,475
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment Gross (under Capital Lease)     127,885
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill     30,700
Business Acquisition, Purchase Price Allocation, PCMR Deposit     57,800
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accounts Payable     7,348
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities     21,766
Business Acquisition, Purchase Price Allocation, Canyons Obligation     305,335
Business Acquisition, Purchase Price Allocation, Contingent Consideration     $ 9,100