Marketable Securities - Amortized Cost vs. Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 893,919	$ 105,459
Fair Value	894,345	105,694
Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	59,595	1,479
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	59,595	1,479
Cash equivalents | Money market funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	59,595	757
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	59,595	757
Cash equivalents | U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		472
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		472
Cash equivalents | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		250
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		250
Marketable securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	834,324	103,980
Gross Unrealized Gains	1,803	321
Gross Unrealized Losses	(1,377)	(86)
Fair Value	834,750	104,215
Marketable securities | U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	202,506	59,856
Gross Unrealized Gains	338	211
Gross Unrealized Losses	(375)	(64)
Fair Value	202,469	60,003
Marketable securities | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	103,219	8,513
Gross Unrealized Gains	51	0
Gross Unrealized Losses	(37)	(5)
Fair Value	103,233	8,508
Marketable securities | Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	512,531	23,552
Gross Unrealized Gains	1,351	96
Gross Unrealized Losses	(957)	(9)
Fair Value	512,925	23,639
Marketable securities | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	16,068	12,059
Gross Unrealized Gains	63	14
Gross Unrealized Losses	(8)	(8)
Fair Value	$ 16,123	$ 12,065