Cash, Cash Equivalents, Restricted Cash and Short-Term Investments - Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Marketable Securities [Line Items]
Amortized Cost	$ 350,928	$ 389,646
Unrealized Gains	9	0
Unrealized Losses	(224)	(256)
Estimated Fair Value	350,713	389,390
Cash, cash equivalents and restricted cash
Marketable Securities [Line Items]
Amortized Cost	81,707	94,172
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	81,707	94,172
U.S. agency securities
Marketable Securities [Line Items]
Amortized Cost		4,951
Unrealized Gains		0
Unrealized Losses		(3)
Estimated Fair Value		4,948
Corporate bonds
Marketable Securities [Line Items]
Amortized Cost	21,670	104,174
Unrealized Gains	0	0
Unrealized Losses	(10)	(94)
Estimated Fair Value	21,660	104,080
Commercial paper
Marketable Securities [Line Items]
Amortized Cost	154,566	125,255
Unrealized Gains	0	0
Unrealized Losses	(119)	(68)
Estimated Fair Value	154,447	125,187
Treasury bills
Marketable Securities [Line Items]
Amortized Cost	40,011	12,290
Unrealized Gains	9	0
Unrealized Losses	0	(8)
Estimated Fair Value	40,020	12,282
Treasury bonds
Marketable Securities [Line Items]
Amortized Cost	52,404	42,301
Unrealized Gains	0	0
Unrealized Losses	(95)	(81)
Estimated Fair Value	52,309	42,220
Yankee bonds
Marketable Securities [Line Items]
Amortized Cost	570	6,503
Unrealized Gains	0	0
Unrealized Losses	0	(2)
Estimated Fair Value	$ 570	$ 6,501