Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.10.0.1
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