Annual report pursuant to Section 13 and 15(d)

Reconciliation of Income Taxes at Federal Statutory Rate to Effective Tax Rate (Detail)

v3.8.0.1
Reconciliation of Income Taxes at Federal Statutory Rate to Effective Tax Rate (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Income Tax Disclosure [Abstract]      
Net Benefit, Taxable Liquidations of Foreign Subsidiaries $ 14,900    
Deferred Tax Assets Operating Loss And Tax Credit Carryforwards $ 41,985 $ 36,761  
Federal statutory rate 35.00% 35.00% 35.00%
State income taxes, net of federal effect 1.10% 1.20% (0.20%)
Net effects of foreign tax rate differential and credits (2.70%) 1.60% (58.40%)
Effective Income Tax Rate Reconciliation, Domestic Manufacturing Deduction 0.60% 0.30% (5.10%)
Foreign Branch Currency Losses (0.30%) 4.90% 0.00%
Goodwill impairment (11.20%) (27.00%) 78.60%
Valuation allowance additions and releases (16.20%) (0.70%) 15.50%
Changes in liability for unrecognized tax benefits (3.70%) (0.90%) (42.10%)
Effective Income Tax Rate Reconciliation, Taxable Liquidation of Foreign Subsidiaries 22.10% 0.00% 0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent (4.60%) 0.00% 0.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent (2.10%) 0.00% 0.00%
Business divestiture 0.00% 3.90% 0.00%
Other items 1.90% 1.00% (1.60%)
Effective income tax rate 19.90% 19.30% 21.70%
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits $ 17,319 $ 25,086  
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits 14,359 8,727  
Deferred Tax Assets, Inventory 2,958 3,044  
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other 14,224 8,317  
Deferred Tax Assets, Gross 90,845 81,935  
Deferred Tax Assets, Valuation Allowance 22,671 8,147  
Deferred Tax Assets, Net of Valuation Allowance 68,174 73,788  
Deferred Tax Liabilities Depreciation And Amortization 77,548 83,020  
Deferred Tax Liabilities, Other 1,910 5,493  
Deferred Tax Liabilities, Gross 79,458 88,513  
Deferred Tax Assets, Net $ 11,284 $ 14,725