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Property, Plant, and Equipment
6 Months Ended
Jun. 30, 2011
Property, Plant, and Equipment [Abstract]  
Property, Plant, and Equipment
 
(5)   Property, Plant, and Equipment
 
A summary of costs for property, plant, and equipment is as follows:
 
                 
    June 30,
    December 31,
 
    2011     2010  
    (in thousands)  
 
Land and improvements
  $ 19,819     $ 19,228  
Buildings
    27,087       25,663  
Machinery and equipment
    1,366,202       1,363,877  
Automotive equipment
    11,396       8,747  
Furniture and fixtures
    9,703       9,279  
Leasehold improvements
    1,361       1,253  
Construction in progress
    59,260       42,674  
                 
      1,494,828       1,470,721  
Accumulated depreciation
    (433,486 )     (389,409 )
                 
    $ 1,061,342     $ 1,081,312  
                 
 
Capitalized interest recognized as a reduction in interest expense for the three months ended June 30, 2011 and 2010 totaled approximately $0.8 million in both periods. Capitalized interest recognized as a reduction in interest expense for the six months ended June 30, 2011 and 2010, totaled approximately $0.9 million and $1.6 million, respectively. Buildings and equipment that are under a capital lease obligation approximated $0.3 million as of June 30, 2011. Amortization of assets held under capital leases is included in depreciation expense.