Goodwill and Intangibles (Details) - USD ($) $ in Thousands	Feb. 29, 2016	Aug. 31, 2015
Goodwill [Line Items]
Goodwill	$ 154,240	$ 150,115
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	4,903
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,812
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3,810
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3,670
Finite-Lived Intangible Assets, Amortization Expense, Year Five	3,383
Nitrogen Production [Member]
Goodwill [Line Items]
Goodwill	$ 0