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Property, Plant and Equipment (Tables)
 12 Months Ended
Sep. 30, 2016
Property, Plant and Equipment  
Summary of the major classes of property, plant and equipment

 

 

 

 

 

 

 

 

 

 

September 30,

 

 

    

2015

    

2016

 

Land and land improvements

 

$
6,992

 

$
7,207

 

Buildings and improvements

 

 
36,326

 

 
37,343

 

Machinery and equipment

 

 
251,701

 

 
262,717

 

Construction in process

 

 
7,400

 

 
28,562

 

 

 

 
302,419

 

 
335,829

 

Less accumulated depreciation

 

 
(117,068)

 

 
(136,647)

 

 

 

$
185,351

 

$
199,182