Quarterly report pursuant to Section 13 or 15(d)

Changes in Carrying Value of Goodwill (Details)

v3.5.0.2
Changes in Carrying Value of Goodwill (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Feb. 29, 2016
May 31, 2016
May 31, 2015
Goodwill [Roll Forward]      
Balance as of August 31, 2015   $ 608,256  
Business acquisitions   45,121  
Goodwill impairment charge $ (118,122) (118,462) $ (77,992)
Impact of changes in foreign currency rates   (5,494)  
Balance as of May 31, 2016   529,421  
Industrial      
Goodwill [Roll Forward]      
Balance as of August 31, 2015   92,107  
Business acquisitions   9,718  
Goodwill impairment charge   0  
Impact of changes in foreign currency rates   (97)  
Balance as of May 31, 2016   101,728  
Energy      
Goodwill [Roll Forward]      
Balance as of August 31, 2015   236,450  
Business acquisitions   35,403  
Goodwill impairment charge   (73,919)  
Impact of changes in foreign currency rates   (4,493)  
Balance as of May 31, 2016   193,441  
Engineered Solutions      
Goodwill [Roll Forward]      
Balance as of August 31, 2015   279,699  
Business acquisitions   0  
Goodwill impairment charge   (44,543)  
Impact of changes in foreign currency rates   (904)  
Balance as of May 31, 2016   $ 234,252