Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Marketable investment securities, restricted cash and other investment securities
Strategic - available-for-sale	$ 191	$ 196
Marketable investment securities	560,720	416,704
Total marketable investment securities	561,113	417,094
Restricted cash and cash equivalents	60,900	60,677
Total other investment securities	161,717	160,074
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities	783,730	637,845
Other investment securities
Marketable investment securities, restricted cash and other investment securities
Marketable investment securities	560,529	416,508
Other investment securities - equity method	161,717	160,074
Restricted Marketable Investment Securities [Member]
Marketable investment securities, restricted cash and other investment securities
Total marketable investment securities	$ 393	$ 390

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

No definition available.

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Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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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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