Marketable Investment Securities (Tables)

6 Months Ended

Jun. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Investment Securities

The following table presents our Marketable investment securities:

	As of
	June 30, 2022		December 31, 2021
Marketable investment securities:
Available-for-sale debt securities:
Corporate bonds	$	167,917	$	289,784
Commercial paper	153,023		498,358
Other debt securities	58,902		92,673
Total available-for-sale debt securities	379,842		880,815
Equity securities	163,477		142,943
Total marketable investment securities, including restricted amounts	543,319		1,023,758
Less: Restricted marketable investment securities	(13,465)		(13,262)
Total marketable investment securities	$	529,854	$	1,010,496

Schedule of Available-for-sale Securities Reconciliation

The following table presents the components of our available-for-sale debt securities:

	Amortized		Unrealized				Estimated
	Cost		Gains		Losses		Fair Value
As of June 30, 2022
Corporate bonds	$	168,830	$	2	$	(915)	$	167,917
Commercial paper	153,023		—		—		153,023
Other debt securities	59,074		—		(172)		58,902
Total available-for-sale debt securities	$	380,927	$	2	$	(1,087)	$	379,842
As of December 31, 2021
Corporate bonds	$	290,169	$	—	$	(385)	$	289,784
Commercial paper	498,358		—		—		498,358
Other debt securities	92,742		—		(69)		92,673
Total available-for-sale debt securities	$	881,269	$	—	$	(454)	$	880,815

Schedule of Activity on Available-for-sale Debt Securities

The following table presents the activity on our available-for-sale debt securities:

	For the three months ended June 30,				For the six months ended June 30,
	2022		2021		2022		2021
Proceeds from sales	$	8,886	$	80,500	$	37,904	$	262,495

Schedule of Activity of Equity Securities

The following table presents the activity of our equity securities:

	For the three months ended June 30,				For the six months ended June 30,
	2022		2021		2022		2021
Gains (losses) on investments, net	$	(22,752)	$	28,533	$	8,263	$	94,101

Schedule of Fair Value Measurements

The following table presents our marketable investment securities categorized by the fair value hierarchy, certain of which have historically experienced volatility:

	Level 1		Level 2		Total
As of June 30, 2022
Cash equivalents (including restricted)	$	743	$	902,037	$	902,780
Available-for-sale debt securities:
Corporate bonds	$	—	$	167,917	$	167,917
Commercial paper	—		153,023		153,023
Other debt securities	14,090		44,812		58,902
Total available-for-sale debt securities	14,090		365,752		379,842
Equity securities	154,312		9,165		163,477
Total marketable investment securities, including restricted amounts	168,402		374,917		543,319
Less: Restricted marketable investment securities	(13,465)		—		(13,465)
Total marketable investment securities	$	154,937	$	374,917	$	529,854
As of December 31, 2021
Cash equivalents (including restricted)	$	7,872	$	423,123	$	430,995
Available-for-sale debt securities:
Corporate bonds	$	—	$	289,784	$	289,784
Commercial paper	—		498,358		498,358
Other debt securities	14,274		78,399		92,673
Total available-for-sale debt securities	14,274		866,541		880,815
Equity securities	131,413		11,530		142,943
Total marketable investment securities, including restricted amounts	145,687		878,071		1,023,758
Less: Restricted marketable investment securities	(13,262)		—		(13,262)
Total marketable investment securities	$	132,425	$	878,071	$	1,010,496