Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Available-for-sale securities:
Short-term investments, Amortized Cost	$ 320,583	$ 198,596
Short-term investments, Gross Unrealized Gains	16	287
Short-term investments, Gross Unrealized Losses, Less than One Year	(718)	(116)
Short-term investments, Gross Unrealized Losses, Greater than One Year	(3,889)
Short-term investments, Estimated Fair Value	315,992	198,767
Long-term investments, Amortized Cost	134,548	228,991
Long-term investments, Gross Unrealized Losses, Less than One Year	(2,467)	(1,381)
Long-term investments, Gross Unrealized Losses, Greater than One Year	(2,291)
Long-term investments, Estimated Fair Value	129,790	227,610
Held-to-maturity securities:
Estimated Fair Value	1,820
Long-term Investments
Amortized Cost	136,368	230,811
Gross Unrealized Losses, Less than One Year	(2,467)	(1,381)
Gross Unrealized Losses, Greater than One Year	(2,291)
Total long-term investments	131,610	229,430
Total investments
Amortized Cost	456,951	429,407
Gross Unrealized Gains	16	287
Gross Unrealized Losses, Less than One Year	(3,185)	(1,497)
Gross Unrealized Losses, Greater than One Year	(6,180)
Estimated Fair Value	447,602	428,197
Certificates of deposit
Held-to-maturity securities:
Amortized Cost	1,820	1,820
Estimated Fair Value	1,820	1,820
Corporate debt securities
Available-for-sale securities:
Short-term investments, Amortized Cost	145,421	85,201
Short-term investments, Gross Unrealized Gains		177
Short-term investments, Gross Unrealized Losses, Less than One Year	(432)	(39)
Short-term investments, Gross Unrealized Losses, Greater than One Year	(2,054)
Short-term investments, Estimated Fair Value	142,935	85,339
Long-term investments, Amortized Cost	68,229	111,793
Long-term investments, Gross Unrealized Losses, Less than One Year	(1,550)	(654)
Long-term investments, Gross Unrealized Losses, Greater than One Year	(676)
Long-term investments, Estimated Fair Value	66,003	111,139
U.S. government and agency debt securities
Available-for-sale securities:
Short-term investments, Amortized Cost	143,710	45,349
Short-term investments, Gross Unrealized Gains	16	35
Short-term investments, Gross Unrealized Losses, Less than One Year	(266)	(24)
Short-term investments, Gross Unrealized Losses, Greater than One Year	(1,289)
Short-term investments, Estimated Fair Value	142,171	45,360
Long-term investments, Amortized Cost	62,220	81,296
Long-term investments, Gross Unrealized Losses, Less than One Year	(917)	(517)
Long-term investments, Gross Unrealized Losses, Greater than One Year	(1,424)
Long-term investments, Estimated Fair Value	59,879	80,779
Non-U.S. government debt securities
Available-for-sale securities:
Short-term investments, Amortized Cost	31,452	68,046
Short-term investments, Gross Unrealized Gains		75
Short-term investments, Gross Unrealized Losses, Less than One Year	(20)	(53)
Short-term investments, Gross Unrealized Losses, Greater than One Year	(546)
Short-term investments, Estimated Fair Value	30,886	68,068
Long-term investments, Amortized Cost	4,099	35,902
Long-term investments, Gross Unrealized Losses, Less than One Year		(210)
Long-term investments, Gross Unrealized Losses, Greater than One Year	(191)
Long-term investments, Estimated Fair Value	$ 3,908	$ 35,692