Long-Term Debt Long-Term Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016	Jul. 31, 2016
Gross interest expense	$ 14,200	$ 10,900	$ 26,200	$ 21,500
Long-term Debt	1,259,576	695,535	1,259,576	695,535	$ 702,320
Amortization of deferred financing costs	300	200	500	500
Intercompany Foreign Currency Balance, Amount	210,000		210,000
Unamortized Debt Issuance Expense	4,476	2,193	4,476	2,193	2,057
Foreign Currency Transaction Gain (Loss), before Tax			$ 5,200
Term Loan [Member]
Line of Credit Facility, Initiation Date			Oct. 14, 2016
Line of Credit Facility, Increase (Decrease), Net			$ 509,400
Debt Instrument, Maturity Date			Oct. 14, 2021
Long-term Line of Credit	750,000		$ 750,000
Long-term Debt	$ 740,625	246,875	$ 740,625	246,875	240,625
Debt Instrument, Interest Rate, Stated Percentage	2.70%		2.70%
Long-term Debt, Description			the term loan facility is subject to quarterly principal payments of approximately $9.4 million, which began on January 31, 2017. Final payment of the remaining amount outstanding plus accrued and unpaid interest is due upon maturity in October 2021.
Credit Facility Revolver [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 400,000		$ 400,000
Long-term Debt	0	64,500	$ 0	64,500	75,000
Whistler Credit Agreement revolver [Member]
Line of Credit Facility, Initiation Date			Nov. 12, 2013
Debt Instrument, Maturity Date			Nov. 12, 2021
Long-term Debt	$ 129,966	$ 0	$ 129,966	$ 0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	3.00%		3.00%
Long-term Debt, Description			Borrowings under the Whistler Credit Agreement are available in Canadian or U.S. dollars and bear interest annually, subject to an applicable margin based on the WB Partnerships’ Consolidated Total Leverage Ratio (as defined in the Whistler Credit Agreement), with pricing as of January 31, 2017, in the case of borrowings (i) in Canadian dollars, at the WB Partnerships’ option, either (a) at the Canadian Prime Rate plus 1.0% per annum or (b) by way of the issuance of bankers’ acceptances at a stamping fee of 2.00% per annum; and (ii) in U.S. dollars, at the WB Partnerships option, either at (a) the U.S. Base Rate plus 1.00% per annum or (b) Banker’s Acceptance Rate plus 2.00% per annum
Debt Instrument, Unused Borrowing Capacity, Fee			0.45%
Canada, Dollars | Whistler Credit Agreement revolver [Member]
Line of Credit Facility, Remaining Borrowing Capacity	$ 75,000		$ 75,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 300,000		$ 300,000