Annual report pursuant to Section 13 and 15(d)

Reconciliation of Changes in Accrued Product Warranty and Restructuring (Detail)

v3.8.0.1
Reconciliation of Changes in Accrued Product Warranty and Restructuring (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Restructuring Cost and Reserve [Line Items]      
Balance as of August 31, 2015 $ 6,273 $ 0  
Restructuring charges 7,228 14,571 $ 0
Payments for Restructuring 7,509 7,519  
Non-cash uses of reserve 527 793  
Restructuring Reserve, Foreign Currency Translation Gain (Loss) 172 14  
Balance as of August 31, 2016 5,637 6,273 0
Accounts Receivable, allowance for doubtful accounts 11,200 7,800  
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]      
Beginning balance 5,592 3,719  
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued 5,608 5,985  
Warranty payments and costs incurred (4,714) (4,058)  
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss) 130 (57)  
Standard and Extended Product Warranty Accrual, Additions from Business Acquisition 0 3  
Ending balance 6,616 5,592 3,719
Industrial      
Restructuring Cost and Reserve [Line Items]      
Balance as of August 31, 2015 1,343 0  
Restructuring charges 1,687 3,158  
Payments for Restructuring (2,384) (1,772)  
Non-cash uses of reserve (436) (54)  
Restructuring Reserve, Foreign Currency Translation Gain (Loss) (8) 11  
Balance as of August 31, 2016 202 1,343 0
Energy      
Restructuring Cost and Reserve [Line Items]      
Balance as of August 31, 2015 3,021 0  
Restructuring charges 1,942 5,544  
Payments for Restructuring (1,460) (2,345)  
Non-cash uses of reserve (41) (166)  
Restructuring Reserve, Foreign Currency Translation Gain (Loss) 151 (12)  
Balance as of August 31, 2016 3,613 3,021 0
Engineered Solutions      
Restructuring Cost and Reserve [Line Items]      
Balance as of August 31, 2015 1,863 0  
Restructuring charges 3,488 5,411  
Payments for Restructuring (3,582) (3,199)  
Non-cash uses of reserve (6) (364)  
Restructuring Reserve, Foreign Currency Translation Gain (Loss) 29 15  
Balance as of August 31, 2016 $ 1,792 $ 1,863 $ 0