Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Marketable investment securities, restricted cash and other investment securities
Total current marketable investment securities	$ 182,816	$ 835,983
Total marketable investment securities	206,048	877,672
Restricted cash and cash equivalents	84,119	62,925
Total other investment securities	180,333	168,200
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities	470,500	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	75	655
Other investment securities
Marketable investment securities, restricted cash and other investment securities
Total current marketable investment securities	182,597	835,184
Other investment securities	180,333	168,200
Restricted marketable investment securities
Marketable investment securities, restricted cash and other investment securities
Total marketable investment securities	$ 23,232	$ 41,689

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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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