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Other Income
 6 Months Ended
Jun. 30, 2011
Other Income [Abstract]  
Other Income
5.   Other Income:
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Loss from sale and disposal of property, equipment and easements, net
  $ —     $ —     $ —     $ (43 )
Rentals
    186       187       354       348  
Interest
    4       —       7       —  
Other
    93       95       119       105  
 
 
  $ 283     $ 282     $ 480     $ 410