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Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Marketable investment securities, restricted cash and other investment securities    
Total current marketable investment securities $ 312,124 $ 835,983
Total marketable investment securities 340,473 877,672
Restricted cash and cash equivalents 77,466 62,925
Total other investment securities 167,276 168,200
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities 585,215 1,108,797
Current marketable investment securities - strategic - available-for-sale    
Marketable investment securities, restricted cash and other investment securities    
Total current marketable investment securities 144 144
Current marketable investment securities - strategic - trading/equity    
Marketable investment securities, restricted cash and other investment securities    
Total current marketable investment securities 346 655
Other investment securities    
Marketable investment securities, restricted cash and other investment securities    
Total current marketable investment securities 311,634 835,184
Other investment securities 167,276 168,200
Restricted marketable investment securities    
Marketable investment securities, restricted cash and other investment securities    
Total marketable investment securities $ 28,349 $ 41,689