Notes Payable, Long-Term Debt and Capital Lease Obligations (Details 2) - USD ($) $ in Thousands	May. 31, 2015	Aug. 31, 2014
Notes Payable, Long-Term Debt and Capital Lease Obligations [Abstract]
Total notes payable, long-term debt and capital lease obligations	$ 1,671,227	$ 1,682,545
Less current installments of notes payable, long-term debt and capital lease obligations	11,365	12,960
Notes payable, long-term debt and capital lease obligations, less current installments	$ 1,659,862	$ 1,669,585