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Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Marketable investment securities, restricted cash and other investment securities    
Current marketable investment securities $ 5,039,382 $ 3,631,637
Restricted marketable investment securities 81,371 51,366
Noncurrent marketable investment securities - ARS and other 133,652 106,172
Total marketable investment securities 5,254,405 3,789,175
Restricted cash and cash equivalents 13,490 82,277
Other investment securities - cost method 17,621 12,879
Total other investment securities 17,621 12,879
Total marketable investment securities, restricted cash and cash equivalents and other investment securities 5,285,516 3,884,331
Current marketable investment securities - VRDNs
   
Marketable investment securities, restricted cash and other investment securities    
Current marketable investment securities 116,570 130,306
Current marketable investment securities - strategic
   
Marketable investment securities, restricted cash and other investment securities    
Current marketable investment securities 534,449 1,261,015
Current marketable investment securities - other
   
Marketable investment securities, restricted cash and other investment securities    
Current marketable investment securities $ 4,388,363 $ 2,240,316