v2.4.0.6
Investment Securities (Details 5) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Fair value of marketable securities    
Total marketable investment securities - current $ 815,951 $ 1,082,407
Total marketable investment securities 823,480 1,086,346
Debt security 655,000  
Corporate Bonds
   
Fair value of marketable securities    
Total marketable investment securities - current 654,096 561,149
Debt security 654,096 561,149
VRDNs
   
Fair value of marketable securities    
Total marketable investment securities - current 66,145 218,665
Debt security 66,145 218,665
Fair value measurements on recurring basis | Total
   
Fair value of marketable securities    
Cash equivalents (including restricted) 533,943 543,243
Total marketable investment securities 823,480 1,086,346
Fair value measurements on recurring basis | Total | Corporate Bonds
   
Fair value of marketable securities    
Debt security 654,096 561,149
Fair value measurements on recurring basis | Total | VRDNs
   
Fair value of marketable securities    
Debt security 66,145 218,665
Fair value measurements on recurring basis | Total | Other (including restricted)
   
Fair value of marketable securities    
Debt security 46,951 90,442
Fair value measurements on recurring basis | Total | Equity securities-Strategic
   
Fair value of marketable securities    
Equity security 56,288 216,090
Fair value measurements on recurring basis | Level 1
   
Fair value of marketable securities    
Cash equivalents (including restricted) 23,621 16,197
Total marketable investment securities 56,288 216,090
Fair value measurements on recurring basis | Level 1 | Equity securities-Strategic
   
Fair value of marketable securities    
Equity security 56,288 216,090
Fair value measurements on recurring basis | Level 2
   
Fair value of marketable securities    
Cash equivalents (including restricted) 510,322 527,046
Total marketable investment securities 767,192 870,256
Fair value measurements on recurring basis | Level 2 | Corporate Bonds
   
Fair value of marketable securities    
Debt security 654,096 561,149
Fair value measurements on recurring basis | Level 2 | VRDNs
   
Fair value of marketable securities    
Debt security 66,145 218,665
Fair value measurements on recurring basis | Level 2 | Other (including restricted)
   
Fair value of marketable securities    
Debt security $ 46,951 $ 90,442