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Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2012
Licenses  
Licenses
Licenses     
   September 30, September 30,
   2012 2011
(Dollars in thousands)     
Balance, beginning of period$ 1,470,769 $ 1,452,101
 Acquisitions  57,957   4,406
 Exchanges  -   11,842
 Other  3,147   2,201
Balance, end of period$ 1,531,873 $ 1,470,550