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Variable Interest Entities VIEs (Tables)
12 Months Ended
Dec. 31, 2013
Variable Interest Entities VIEs  
Consolidated VIE assets and liabilities
December 31,2013 2012
(Dollars in thousands)     
Assets     
 Cash and cash equivalents$ 2,076 $ 7,028
 Other current assets  1,184   3,267
 Licenses and other intangible assets  310,475   325,707
 Property, plant and equipment, net  18,600   31,544
 Other assets and deferred charges  511   3,026
  Total assets$ 332,846 $ 370,572
        
Liabilities     
 Current liabilities$ 46 $ 9,985
 Deferred liabilities and credits  3,139   6,213
  Total liabilities$ 3,185 $ 16,198