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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment consist of the following (in thousands): 
 
December 31, 2013
 
December 31, 2012
Land
$
1,764

 
$
2,010

Buildings and improvements
489,535

 
581,286

Machinery and equipment
365,783

 
360,199

Capitalized leases for machinery, equipment, buildings, and land
16,133

 
35,129

 
873,215

 
978,624

Accumulated amortization
(395,520
)
 
(313,067
)
 
477,695

 
665,557

Construction in progress
8,578

 
18,303

 
$
486,273

 
$
683,860


Rent expense for operating lease agreements was $16.7 million, $14.1 million and $14.2 million for the years ended December 31, 2013, 2012 and 2011, respectively.