Quarterly report pursuant to Section 13 or 15(d)

Summary of Financial Information by Reportable Segment and Product Line (Details)

v3.8.0.1
Summary of Financial Information by Reportable Segment and Product Line (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 28, 2018
Feb. 28, 2017
Aug. 31, 2017
Segment Reporting Information [Line Items]          
Net sales $ 275,165 $ 258,869 $ 564,120 $ 524,662  
Operating profit (Loss) 9,589 13,199 24,262 21,670  
Assets 1,480,305   1,480,305   $ 1,516,955
Impairment & divestiture charges 2,987 0 2,987 0  
Industrial          
Segment Reporting Information [Line Items]          
Net sales 99,081 91,648 195,997 178,938  
Operating profit (Loss) 16,781 18,380 35,024 37,155  
Assets 324,477   324,477   329,134
Industrial Tools [Member]          
Segment Reporting Information [Line Items]          
Net sales 87,438 78,679 171,949 157,718  
Heavy Lifting Technology [Member]          
Segment Reporting Information [Line Items]          
Net sales 11,643 12,969 24,048 21,220  
Energy          
Segment Reporting Information [Line Items]          
Net sales 65,992 72,884 141,833 157,530  
Operating profit (Loss) (4,513) (579) (4,220) 2,632  
Assets 464,018   464,018   482,963
Energy Maintenance & Integrity          
Segment Reporting Information [Line Items]          
Net sales 48,889 51,590 105,598 116,411  
Other Energy Solutions [Member]          
Segment Reporting Information [Line Items]          
Net sales 17,103 21,294 36,235 41,119  
Engineered Solutions          
Segment Reporting Information [Line Items]          
Net sales 110,092 94,337 226,290 188,194  
Operating profit (Loss) 2,209 1,816 8,543 2,571  
Assets 548,547   548,547   531,068
On-Highway          
Segment Reporting Information [Line Items]          
Net sales 59,297 50,611 124,179 102,242  
Agriculture, Off-Highway and Other          
Segment Reporting Information [Line Items]          
Net sales 50,795 43,726 102,111 85,952  
General Corporate          
Segment Reporting Information [Line Items]          
Operating profit (Loss) (4,888) $ (6,418) (15,085) $ (20,688)  
Assets 143,263   143,263   $ 173,790
Viking [Domain]          
Segment Reporting Information [Line Items]          
Impairment & divestiture charges $ 2,987   $ 2,987