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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Note 4.  Property, Plant and Equipment

Property, plant and equipment consisted of the following at December 31, 2012 and 2011:
 
   
Estimated
Useful Lives
 
2012
  
2011
 
      
(in thousands)
 
Land
    $3,345  $3,087 
Buildings and structures
 
10 – 40 years
  75,664   71,934 
Cable and wire
 
4 – 40 years
  175,833   155,884 
Equipment and software
 
2 – 16.7 years
  331,374   305,362 
Plant in service
    $586,216  $536,267 
Plant under construction
     25,469   12,389 
Total property, plant and equipment
     611,685   548,656 
Less accumulated amortization and depreciation
    246,211   237,902 
Property, plant and equipment, net
    $365,474  $310,754 

The Company traded in certain base station PCS equipment for 4G LTE base station equipment in 2012, and in 2011, traded in certain base station PCS equipment for equipment with additional capacity, and received credits of $20.3 million and $2.9 million, respectively, against the fair value purchase price of the new equipment.  The Company recognized gains of $1.8 million in 2011 for the difference between the book value of the equipment traded in and the trade-in credit received.  For 2012, the Company adjusted depreciation on equipment to be traded in so that the net book value at trade in approximated the credit to be received.