Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT (Details)

v3.8.0.1
PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, net $ 235,533 $ 219,492  
Depreciation expense 44,668 44,659 $ 43,820
Buildings      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 104,604 102,153  
Machinery and equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 412,980 378,650  
Buildings, Machinery and Equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 517,584 480,803  
Less accumulated depreciation (335,346) (305,613)  
Total property, plant and equipment, net 182,238 175,190  
Land      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 16,845 19,705  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 36,450 $ 24,597