Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 600,291	$ 676,358	$ 575,103	$ 714,525	$ 696,074	$ 789,165	$ 668,917	$ 842,709	$ 2,566,277	$ 2,996,865	$ 3,613,851
Long-lived assets	760,715				884,999				760,715	884,999	708,426
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									2,175,058	2,659,258	3,338,243
Long-lived assets	367,357				430,641				367,357	430,641	472,811
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									230,596	229,508	205,662
Long-lived assets	158,218				172,485				158,218	172,485	169,371
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	139,852				191,393				139,852	191,393	0
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									160,623	108,099	69,946
Long-lived assets	$ 95,288				$ 90,480				$ 95,288	$ 90,480	$ 66,244