Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT (Details)

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PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, net $ 180,731 $ 144,049  
Depreciation expense 31,303 24,630 23,461
Buildings [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 77,936 64,946  
Machinery and Equipment [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 303,674 261,857  
Buildings, Machinery and Equipment [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 381,610 326,803  
Less accumulated depreciation (233,791) (206,472)  
Total property, plant and equipment, net 147,819 120,331  
Land [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 15,534 9,207  
Construction in Progress [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 17,378 $ 14,511