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Variable Interest Entities VIEs (Tables)
12 Months Ended
Dec. 31, 2014
Variable Interest Entities VIEs  
Consolidated VIE assets and liabilities
December 31,2014 2013
(Dollars in thousands)     
Assets     
 Cash and cash equivalents$ 2,588 $ 2,076
 Other current assets  278   1,184
 Licenses  312,977   310,475
 Property, plant and equipment, net  10,671   18,600
 Other assets and deferred charges  60,059   511
 Total assets$ 386,573 $ 332,846
       
Liabilities     
 Current liabilities$ 110 $ 46
 Deferred liabilities and credits  622   3,139
 Total liabilities$ 732 $ 3,185