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