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Property And Equipment
12 Months Ended
Dec. 31, 2011
Property And Equipment [Abstract]  
Property And Equipment
4. PROPERTY AND EQUIPMENT

Property and equipment at December 31, 2011 and 2010 are as follows:

 

     2011     2010  

Land

   $ 2,764      $ 2,870   

Buildings and improvements

     5,184        5,190   

Furniture and fixtures

     3,636        3,074   

Operating equipment

     519,008        499,976   
  

 

 

   

 

 

 

Total property and equipment

     530,592        511,110   

Accumulated depreciation

     (220,072     (187,879
  

 

 

   

 

 

 

Property and equipment—net

   $ 310,520      $ 323,231   
  

 

 

   

 

 

 

 

Depreciation expense was $38,372, $33,874 and $32,251, for the years ended December 31, 2011, 2010 and 2009, respectively.