Marketable Securities - Summary of Available-for-sale Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Amortized Cost	$ 1,479,543	$ 1,286,225
Unrealized Gain	17	80
Unrealized Losses	(14,879)	(2,832)
Fair Value	1,464,681	1,283,473
Commercial debt securities
Marketable Securities [Line Items]
Amortized Cost	998,355	1,034,573
Unrealized Gain	0	43
Unrealized Losses	(12,370)	(2,564)
Fair Value	985,985	1,032,052
Certificates of deposit
Marketable Securities [Line Items]
Amortized Cost	72,843	14,574
Unrealized Gain	3	5
Unrealized Losses	(167)	(10)
Fair Value	72,679	14,569
U.S. government treasury securities
Marketable Securities [Line Items]
Amortized Cost	179,598	77,628
Unrealized Gain	6	18
Unrealized Losses	(1,425)	(204)
Fair Value	178,179	77,442
Commercial paper
Marketable Securities [Line Items]
Amortized Cost	220,720	151,379
Unrealized Gain	8	14
Unrealized Losses	(849)	(37)
Fair Value	219,879	151,356
Non-U.S. government securities
Marketable Securities [Line Items]
Amortized Cost	8,027	8,071
Unrealized Gain	0	0
Unrealized Losses	(68)	(17)
Fair Value	$ 7,959	$ 8,054

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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