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Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2013
Property and Equipment  
Schedule of property and equipment

 

 

(dollars in thousands)
   Estimated
Useful Life
in Years		   2013   2012  

Land

   —   $ 4,360   $ 3,990  

Buildings and improvements

   3 to 39     16,082     13,096  

Construction equipment

   2 to 12     233,051     195,085  

Office equipment

   3 to 8     5,117     4,782  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​

 

         258,610     216,953  

Less: Accumulated depreciation and amortization

         (115,679 )   (88,042 )
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​

 

       $ 142,931   $ 128,911  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​