Financial Instruments - Schedule of Cash and Cash Equivalents, Money Market Funds and Short-term Investments by Significant Investment Category (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	$ 520,086	$ 327,771
Unrealized Gains	0	45
Unrealized Losses	(1,907)	(2,003)
Market Value	518,179	325,813
Level 2 | Corporate debt securities included in cash and cash equivalents and short-term investments
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	313,991	266,267
Unrealized Gains	0	45
Unrealized Losses	(1,226)	(1,887)
Market Value	312,765	264,425
Money Market Funds | Level 1
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	52,246	28,312
Unrealized Gains	0	0
Unrealized Losses	0	0
Market Value	52,246	28,312
U.S. Treasury securities included in cash and cash equivalents and short-term investments | Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	33,472	4,446
Unrealized Gains	0	0
Unrealized Losses	(82)	(5)
Market Value	33,390	4,441
U.S. government agency securities included in cash and cash equivalents and short-term investments | Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	120,377	28,746
Unrealized Gains	0	0
Unrealized Losses	(599)	(111)
Market Value	$ 119,778	$ 28,635