Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Aug. 31, 2018	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Income Tax Disclosure Additional Details [Table] [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense			$ 3,000	$ 2,900	$ 2,300
Unrecognized Tax Benefits, Period Increase (Decrease), Reasonably Possible in Future Period			$ (3,400)
Federal statutory rate	35.00%	21.00%	25.70%	35.00%	35.00%
Deferred Tax Assets, Net of Valuation Allowance			$ 500
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other			5,300
Deferred Tax Assets, Gross			(11,900)
Director & officer transition charges			0	$ 7,784	$ 0
Valuation Allowances and Reserves, Additions for Charges to Cost and Expense			18,100	15,100
Impairment, Non-Deductible for Income Tax Purposes			45,100	69,000	118,500
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount			10,300
Unrecognized Tax Benefits, Period Increase (Decrease)			(6,600)
Valuation Allowances and Reserves, Deductions			12,800	600
Net Benefit, Taxable Liquidations of Foreign Subsidiaries			1,500	14,900
Operating Loss Carryforward		$ 60,800	60,800
Loss on product line divestiture			$ 0	$ 0	$ 5,092
Percent of Revenue (excluding impairment charge) from foreign jurisdictions			79.00%	63.00%	53.00%
Income taxes, net of refunds			$ (1,500)	$ 11,800	$ 21,400
Deferred Tax Assets, Operating Loss Carryforwards, Foreign		$ 125,900	125,900
Change in valuation allowances			7,100
Additional Income Tax Provision			2,200
Domestic Destination
Income Tax Disclosure Additional Details [Table] [Line Items]
Non-cash impairment charge					49,000
Foreign Destination
Income Tax Disclosure Additional Details [Table] [Line Items]
Non-cash impairment charge			49,318		137,500
Valuation Allowance of Deferred Tax Assets
Income Tax Disclosure Additional Details [Table] [Line Items]
Valuation Allowances and Reserves, Additions for Charges to Cost and Expense			25,209	15,144	852
Valuation Allowances and Reserves, Deductions			$ 12,804	$ 620	$ 1,026