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Property, Plant, and Equipment
3 Months Ended
Mar. 31, 2012
Property, Plant, and Equipment  
Property, Plant, and Equipment

(6) Property, Plant, and Equipment

        A summary of costs for property, plant, and equipment is as follows:

 
  March 31,
2012
  December 31,
2011
 
 
  (in thousands)
 

Land and improvements

  $ 26,673   $ 26,136  

Buildings

    37,375     37,289  

Machinery and equipment

    1,992,653     1,967,269  

Automotive equipment

    10,621     10,217  

Furniture and fixtures

    12,664     12,349  

Leasehold improvements

    1,970     1,445  

Railcars

    2,496     2,496  

Construction in progress

    117,204     94,085  
           

 

    2,201,656     2,151,286  

Accumulated depreciation

    509,522     478,325  
           

 

  $ 1,692,134   $ 1,672,961  
           

        Capitalized interest recognized as a reduction in interest expense for the three months ended March 31, 2012 and 2011 totaled approximately $2.1 million and $0.1 million. Land, building and equipment that are under a capital lease obligation had an original carrying value of approximately $25.1 million and $0.3 million as of March 31, 2012 and 2011. Amortization of assets held under capital leases is included in depreciation expense.