Investments - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Marketable debt securities, continuous unrealized loss position, less than 12 months	$ 77,869	$ 149,512
Marketable debt securities, continuous unrealized loss position, less than 12 months, accumulated loss	(1,357)	(381)
Marketable debt securities, continuous unrealized loss position, 12 months or longer	0	0
Marketable debt securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Marketable debt securities, unrealized loss position	77,869	149,512
Marketable debt securities, unrealized loss position, accumulated loss	(1,357)	(381)
Corporate debt security
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Marketable debt securities, continuous unrealized loss position, less than 12 months	53,481	113,806
Marketable debt securities, continuous unrealized loss position, less than 12 months, accumulated loss	(1,044)	(303)
Marketable debt securities, continuous unrealized loss position, 12 months or longer	0	0
Marketable debt securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Marketable debt securities, unrealized loss position	53,481	113,806
Marketable debt securities, unrealized loss position, accumulated loss	(1,044)	(303)
U.S. treasuries
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Marketable debt securities, continuous unrealized loss position, less than 12 months	5,534	5,604
Marketable debt securities, continuous unrealized loss position, less than 12 months, accumulated loss	(74)	(12)
Marketable debt securities, continuous unrealized loss position, 12 months or longer	0	0
Marketable debt securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Marketable debt securities, unrealized loss position	5,534	5,604
Marketable debt securities, unrealized loss position, accumulated loss	(74)	(12)
Asset-backed security and other
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Marketable debt securities, continuous unrealized loss position, less than 12 months	7,778	7,961
Marketable debt securities, continuous unrealized loss position, less than 12 months, accumulated loss	(132)	(32)
Marketable debt securities, continuous unrealized loss position, 12 months or longer	0	0
Marketable debt securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Marketable debt securities, unrealized loss position	7,778	7,961
Marketable debt securities, unrealized loss position, accumulated loss	(132)	(32)
Non-U.S. government and supranational bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Marketable debt securities, continuous unrealized loss position, less than 12 months	9,072	20,140
Marketable debt securities, continuous unrealized loss position, less than 12 months, accumulated loss	(107)	(34)
Marketable debt securities, continuous unrealized loss position, 12 months or longer	0	0
Marketable debt securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Marketable debt securities, unrealized loss position	9,072	20,140
Marketable debt securities, unrealized loss position, accumulated loss	(107)	(34)
Certificate of deposit
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Marketable debt securities, continuous unrealized loss position, less than 12 months	2,004	2,001
Marketable debt securities, continuous unrealized loss position, less than 12 months, accumulated loss	0	0
Marketable debt securities, continuous unrealized loss position, 12 months or longer	0	0
Marketable debt securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Marketable debt securities, unrealized loss position	2,004	2,001
Marketable debt securities, unrealized loss position, accumulated loss	$ 0	$ 0