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Property, Plant and Equipment
3 Months Ended
Mar. 31, 2012
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment consist of the following (in thousands): 
 
March 31, 2012
 
December 31,
2011
Land
$
1,432

 
$
1,432

Building improvements
535,911

 
520,137

Machinery and equipment
260,620

 
246,584

Capitalized leases for machinery, equipment and buildings
77,435

 
76,244

 
875,398

 
844,397

Accumulated depreciation and amortization
(253,551
)
 
(235,528
)
 
621,847

 
608,869

Construction in progress
71,722

 
78,807

 
$
693,569

 
$
687,676