Investments - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 719,223	$ 852,251
Gross unrealized gains	54	95
Gross unrealized losses	(1,561)	(3,769)
Estimated fair value	717,716	848,577
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	131,273	95,195
Gross unrealized gains	0	0
Gross unrealized losses	(387)	(662)
Estimated fair value	$ 130,886	$ 94,533
Corporate debt securities | Maximum
Debt Securities, Available-for-sale [Line Items]
Maturity	2 years	2 years
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 275,067	$ 443,489
Gross unrealized gains	2	65
Gross unrealized losses	(328)	(811)
Estimated fair value	$ 274,741	$ 442,743
Commercial paper | Maximum
Debt Securities, Available-for-sale [Line Items]
Maturity	1 year	1 year
U.S. Agency bonds
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 244,277	$ 90,351
Gross unrealized gains	52	22
Gross unrealized losses	(689)	(434)
Estimated fair value	$ 243,640	$ 89,939
U.S. Agency bonds | Maximum
Debt Securities, Available-for-sale [Line Items]
Maturity	2 years	2 years
U.S. Treasury bills
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 68,606	$ 223,216
Gross unrealized gains	0	8
Gross unrealized losses	(157)	(1,862)
Estimated fair value	$ 68,449	$ 221,362
U.S. Treasury bills | Maximum
Debt Securities, Available-for-sale [Line Items]
Maturity	2 years	2 years