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Fair Value (Tables)
3 Months Ended
Mar. 31, 2013
Fair Value [Abstract]  
Schedule Of Long-Term Investments Measured At Fair Value
(in thousands)   2013     2012  
Balance as of January 1   $ 10,324     $ 24,673  
Net unrealized gains (losses) included in other comprehensive loss     (8 )     646  
Sales of investments at par value     (25 )     (25 )
Balance as of March 31   $ 10,291     $ 25,294  
                 
Unrealized losses still held as of March 31   $ 1,859     $ 2,681