Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Feb. 28, 2017
Marketable Investment Securities, Restricted Cash and Cash Equivalents and Other Investment Securities:
Current marketable investment securities	$ 1,376,070	$ 132,593
Total marketable investment securities	1,376,070	132,593
Restricted cash and cash equivalents	55,026	58,323
Other investment securities	99,035	97,306
Total other investment securities	99,035	97,306
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities	$ 1,530,131	$ 288,222
NagraStar L.L.C
Marketable Investment Securities, Restricted Cash and Cash Equivalents and Other Investment Securities:
Ownership interest in equity method investment			50.00%

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

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of investment in marketable security.

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Amount of investment in marketable security, classified as current.

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Amount of investments classified as other.

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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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