Notes Payable and Long-Term Debt - Schedule of Interest, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Debt Disclosure [Abstract]
Interest Expense	$ 24,365	$ 23,397	$ 64,975	$ 57,823
Interest-purchase of NCRA noncontrolling interest	4,844	23,862	23,772	56,258
Capitalized interest	(17,104)	(2,641)	(41,715)	(6,503)
Interest income	(2,548)	(2,129)	(7,384)	(5,315)
Interest Income (Expense), Net	$ 9,557	$ 42,489	$ 39,648	$ 102,263