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Property, Plant and Equipment
12 Months Ended
Sep. 30, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant And Equipment
7. Property, Plant and Equipment
 
Depreciation expense of property, plant and equipment for the years ended September 30, 2013, 2012 and 2011 was $8.6 million, $8.1 million and $7.8 million, respectively.
 
The Company leases certain real property, equipment and machinery under noncancelable operating leases. Rental expense under these operating leases for the years ended September 30, 2013, 2012 and 2011 was $5 million, $5 million and $8.1 million, respectively. Future aggregate minimum lease payments under operating leases that have initial or remaining noncancelable lease terms in excess of one year as of September 30, 2013, are:
 
(Dollars in thousands)
 
 
 
Years ending September 30:
 
 
 
2014
 
$
4,994
2015
 
 
4,219
2016
 
 
2,519
2017
 
 
1,472
2018 and thereafter
 
 
1,749
Total
 
$
14,953