Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment

Property, plant and equipment at March 31, 2015 and December 31, 2014 consisted of the following:

 

     Residual Value
as Percentage of
Original Cost
  Useful Life
in Years
   March 31,
2015
     December 31,
2014
 
              (In thousands)  

Land

        $ 10,848       $ 10,920   

Vehicles and machinery

   0 - 55%   5 - 30      114,860         114,150   

Buildings and improvements (1)

   0 - 25   3 - 30      19,489         19,365   

Office fixtures and equipment

   0   3 - 5      35,198         33,942   
       

 

 

    

 

 

 

Property, plant and equipment

  180,395      178,377   

Accumulated depreciation

  (63,660   (65,202
       

 

 

    

 

 

 

Property, plant and equipment, net

$ 116,735    $ 113,175   
       

 

 

    

 

 

 

 

(1) Improvements made to leased properties are amortized over the lesser of the estimated remaining life or the remaining term of the respective lease.