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Variable Interest Entities VIEs (Tables)
9 Months Ended
Sep. 30, 2013
Variable Interest Entities VIEs  
Consolidated VIE assets and liabilities
  September 30, 2013 December 31, 2012
(Dollars in thousands)     
Assets     
 Cash and cash equivalents$ 2,669 $ 5,849
 Other current assets  1,190   120
 Licenses  308,091   308,091
 Property, plant and equipment, net  17,535   16,443
 Other assets and deferred charges  541   887
 Total assets$ 330,026 $ 331,390
       
Liabilities     
 Current liabilities$ 3 $ 1,013
 Deferred liabilities and credits  3,280   3,024
 Total liabilities$ 3,283 $ 4,037