Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2021

Dec. 31, 2020

Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities

Schedule of marketable investment securities, restricted cash and cash equivalents, and other investment securities

	As of
	March 31,		December 31,
	2021		2020
	(In thousands)
Marketable investment securities:
Current marketable investment securities	$	48,995	$	132,593
Restricted marketable investment securities (1)		—		—
Total marketable investment securities		48,995		132,593
Restricted cash and cash equivalents (1)		58,255		58,323
Other investment securities:
Other investment securities		98,050		97,306
Total other investment securities		98,050		97,306
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities	$	205,300	$	288,222

(1) Restricted marketable investment securities and restricted cash and cash equivalents are included in “Restricted cash, cash equivalents and marketable investment securities” on our Condensed Consolidated Balance Sheets.

	As of December 31,
	2020		2019
	(In thousands)
Marketable investment securities:
Current marketable investment securities	$	132,593	$	—
Restricted marketable investment securities (1)		—		390
Total marketable investment securities		132,593		390
Restricted cash and cash equivalents (1)		58,323		60,677
Other investment securities:
Other investment securities		97,306		106,874
Total other investment securities		97,306		106,874
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities	$	288,222	$	167,941

(1) Restricted marketable investment securities and restricted cash and cash equivalents are included in “Restricted cash, cash equivalents and marketable investment securities” on our Consolidated Balance Sheets.

Schedule of investments measured at fair value on a recurring basis

	As of
	March 31, 2021								December 31, 2020
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
	(In thousands)
Cash equivalents (including restricted)	$	1,653,660	$	60,153	$	1,593,507	$	—	$	1,278,971	$	172,025	$	1,106,946	$	—
Debt securities (including restricted):
U.S. Treasury and agency securities	$	—	$	—	$	—	$	—	$	22,476	$	22,476	$	—	$	—
Commercial paper		47,590		—		47,590		—		101,959		—		101,959		—
Corporate securities		877		—		877		—		8,068		—		8,068		—
Other		528		—		528		—		90		—		90		—
Total	$	48,995	$	—	$	48,995	$	—	$	132,593	$	22,476	$	110,117	$	—

	As of December 31,
	2020								2019
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
	(In thousands)
Cash equivalents (including restricted)	$	1,278,971	$	172,025	$	1,106,946	$	—	$	60,677	$	60,677	$	—	$	—
Debt securities (including restricted):
U.S. Treasury and agency securities	$	22,476	$	22,476	$	—	$	—	$	390	$	390	$	—	$	—
Commercial paper		101,959		—		101,959		—		—		—		—		—
Corporate securities		8,068		—		8,068		—		—		—		—		—
Other		90		—		90		—		—		—		—		—
Total	$	132,593	$	22,476	$	110,117	$	—	$	390	$	390	$	—	$	—

Gains and Losses on Sales and Changes in Carrying Amounts of Investments

	For the Three Months Ended
	March 31,
Other, net:	2021		2020
	(In thousands)
Costs related to early redemption of debt	$	(2,600)	$	—
Equity in earnings (losses) of affiliates		903		278
Other		189		667
Total	$	(1,508)	$	945

	For the Years Ended December 31,
Other, net:	2020		2019		2018
	(In thousands)
Marketable investment securities - realized and unrealized gains (losses)	$	—	$	3,119	$	5,313
Costs related to early redemption of debt		—		—		(3,261)
Gain (loss) on sale of subsidiary		—		—		7,004
Equity in earnings (losses) of affiliates		653		3,514		(2,110)
Other		1,033		976		2,048
Total	$	1,686	$	7,609	$	8,994