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

Property and equipment consist of the following (dollars in thousands):

 
    
   December 31,  
 
   Estimated
Useful Lives
in Years		  
 
   2013   2012  

Land

   —   $ 2,404   $ 2,404  

Transportation equipment

   1 - 7     46,233     38,352  

Machinery and equipment

   1 - 15     22,920     21,670  

Computer and telephone equipment

   1 - 10     19,012     18,481  

Buildings and leasehold improvements

   2 - 40     25,371     24,438  

Furniture and fixtures

   2 - 17     5,036     4,741  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​

 

         120,976     110,086  

Less—Accumulated depreciation

         (74,115 )   (68,670 )
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Property and equipment, net

       $ 46,861   $ 41,416  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​