Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Details)

v3.8.0.1
Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
2 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended
Feb. 28, 2018
Feb. 28, 2018
Feb. 28, 2017
Dec. 31, 2017
Feb. 28, 2018
Feb. 28, 2017
Income Tax Disclosure Additional Details [Table] [Line Items]            
Earnings (loss) before income taxes   $ 1,618 $ 5,274   $ 8,448 $ 7,241
Income tax expense (benefit)   $ 19,839 $ 200   $ 21,443 $ (2,798)
Effective Income Tax Rate Reconciliation, Percent   1226.10% 3.80%   253.80% (38.60%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00%     35.00%    
Effective Income Tax Rate Reconciliation, at Blended Federal Statutory Income Tax Rate         25.70%  
Transition Tax   $ 16,200     $ 16,200  
Change in Income Tax Expense   (16,700)     (16,700)  
Valuation Allowances Recorded Against Foreign Tax Credits   8,900     8,900  
Provisional Tax Expense Related to Tax Cuts and Jobs Act   8,400     $ 8,400  
Discrete Income Tax Expense - related to shortfall   $ 1,500