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Variable Interest Entities VIEs (Tables)
3 Months Ended
Mar. 31, 2014
Variable Interest Entities VIEs  
Consolidated VIE assets and liabilities
   March 31, 2014 December 31, 2013
(Dollars in thousands)     
Assets     
 Cash and cash equivalents$ 2,325 $ 2,076
 Other current assets  1,126   1,184
 Licenses  310,475   310,475
 Property, plant and equipment, net  16,940   18,600
 Other assets and deferred charges  511   511
  Total assets$ 331,377 $ 332,846
        
Liabilities     
 Current liabilities$ 135 $ 46
 Deferred liabilities and credits  2,122   3,139
  Total liabilities$ 2,257 $ 3,185