Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Marketable investment securities, restricted cash and other investment securities
Total current marketable investment securities	$ 2,975,518	$ 362,953
Total marketable investment securities	3,004,214	387,420
Restricted cash and cash equivalents	5,306,072	83,902
Total other investment securities	150,941	149,706
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities	8,461,227	621,028
Current marketable investment securities - strategic - available-for-sale
Marketable investment securities, restricted cash and other investment securities
Total current marketable investment securities	152	195
Current marketable investment securities - strategic - trading/equity
Marketable investment securities, restricted cash and other investment securities
Total current marketable investment securities	1,895
Other investment securities
Marketable investment securities, restricted cash and other investment securities
Total current marketable investment securities	2,973,471	362,758
Other investment securities	150,941	149,706
Restricted Marketable Investment Securities [Member]
Marketable investment securities, restricted cash and other investment securities
Total marketable investment securities	$ 28,696	$ 24,467

Marketable investment securities, restricted cash and cash equivalent and other investment securities.

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Fair value and equity method investments.

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Amount of investment in marketable security.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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