Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Debt Issuance Costs, Net	$ 4,820	$ 5,574
Minimum | Subsidiaries
Income Taxes [Abstract]
Subsidiaries Ownership Percentage	80.00%
Minimum | Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum | Major Maintenance Activities Requiring Shutdown
Finite-Lived Intangible Assets, Net
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum | Land and Land Improvements
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Minimum | Building
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Minimum | Machinery, Equipment, Office and Other
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Minimum | Property, Plant and Equipment, Other Types [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum | Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net
Finite-Lived Intangible Asset, Useful Life	30 years
Maximum | Major Maintenance Activities Requiring Shutdown
Finite-Lived Intangible Assets, Net
Finite-Lived Intangible Asset, Useful Life	4 years
Maximum | Land and Land Improvements
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Maximum | Building
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Maximum | Machinery, Equipment, Office and Other
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Maximum | Property, Plant and Equipment, Other Types [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Accounting Standards Update 2015-03 [Member] | Other Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt Issuance Costs, Net		$ 5,600