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Property, Plant, and Equipment
9 Months Ended
Sep. 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:
 
                 
    September 30,
    December 31,
 
    2011     2010  
    (in thousands)  
 
Land and improvements
  $ 20,792     $ 19,228  
Buildings
    27,873       25,663  
Machinery and equipment
    1,375,484       1,363,877  
Automotive equipment
    11,724       8,747  
Furniture and fixtures
    10,061       9,279  
Leasehold improvements
    1,361       1,253  
Construction in progress
    87,582       42,674  
                 
      1,534,877       1,470,721  
Accumulated depreciation
    (455,276 )     (389,409 )
                 
    $ 1,079,601     $ 1,081,312  
                 
 
Capitalized interest recognized as a reduction in interest expense for the three months ended September 30, 2011 and 2010 totaled approximately $1.6 million and $0.1 million, respectively. Capitalized interest recognized as a reduction in interest expense for the nine months ended September 30, 2011 and 2010, totaled approximately $2.5 million and $1.7 million, respectively. Buildings and equipment that are under a capital lease obligation approximated $0.3 million as of September 30, 2011. Amortization of assets held under capital leases is included in depreciation expense.