Cash, Cash Equivalents and Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	$ 878,921	$ 94,919
Amortized Cost	2,413,316	878,105
Gross Unrealized Gains	31,527	108,312
Gross Unrealized Losses	(7)	(68)
Fair Value	2,444,836	986,349
Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	878,921	94,919
Fair Value	1,423,871	454,844
Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	0	0
Fair Value	68,179	198,270
Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	0	0
Fair Value	952,786	333,235
Level 1:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	616,834	504,295
Gross Unrealized Gains	31,458	108,302
Gross Unrealized Losses	0	(5)
Fair Value	648,292	612,592
Level 1: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	485,611	322,874
Level 1: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	68,179	198,270
Level 1: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	94,502	91,448
Level 2:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	917,561	278,891
Gross Unrealized Gains	69	10
Gross Unrealized Losses	(7)	(63)
Fair Value	917,623	278,838
Level 2: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	59,339	37,051
Level 2: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Level 2: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	858,284	241,787
Money market funds | Level 1:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	334,128	322,874
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	334,128	322,874
Money market funds | Level 1: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	334,128	322,874
Money market funds | Level 1: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Money market funds | Level 1: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
U.S. Treasury bills | Level 1:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	213,516	14,431
Gross Unrealized Gains	69	25
Gross Unrealized Losses	0	0
Fair Value	213,585	14,456
U.S. Treasury bills | Level 1: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	151,483	0
U.S. Treasury bills | Level 1: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
U.S. Treasury bills | Level 1: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	62,102	14,456
Marketable securities | Level 1:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	36,794	90,000
Gross Unrealized Gains	31,385	108,270
Gross Unrealized Losses	0	0
Fair Value	68,179	198,270
Marketable securities | Level 1: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Marketable securities | Level 1: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	68,179	198,270
Marketable securities | Level 1: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Agency bonds | Level 1:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	25,911	996
Gross Unrealized Gains	4	0
Gross Unrealized Losses	0	0
Fair Value	25,915	996
Agency bonds | Level 1: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Agency bonds | Level 1: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Agency bonds | Level 1: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	25,915	996
U.S. Government bonds | Level 1:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	6,485	75,994
Gross Unrealized Gains	0	7
Gross Unrealized Losses	0	(5)
Fair Value	6,485	75,996
U.S. Government bonds | Level 1: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
U.S. Government bonds | Level 1: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
U.S. Government bonds | Level 1: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	6,485	75,996
Term deposits | Level 2:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	749,618	136,480
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	749,618	136,480
Term deposits | Level 2: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	59,339	11,480
Term deposits | Level 2: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Term deposits | Level 2: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	690,279	125,000
Corporate bonds | Level 2:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	125,936	122,018
Gross Unrealized Gains	68	10
Gross Unrealized Losses	(7)	(63)
Fair Value	125,997	121,965
Corporate bonds | Level 2: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	24,075
Corporate bonds | Level 2: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Corporate bonds | Level 2: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	125,997	97,890
Commercial paper | Level 2:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	40,507	20,393
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	40,507	20,393
Commercial paper | Level 2: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	1,496
Commercial paper | Level 2: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0	0
Commercial paper | Level 2: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	40,507	$ 18,897
Certificates of deposit | Level 2:
Restricted Cash and Cash Equivalent Item [Line Items]
Amortized Cost	1,500
Gross Unrealized Gains	1
Gross Unrealized Losses	0
Fair Value	1,501
Certificates of deposit | Level 2: | Cash and Cash Equivalents
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0
Certificates of deposit | Level 2: | Marketable Securities
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	0
Certificates of deposit | Level 2: | Short-Term Investments
Restricted Cash and Cash Equivalent Item [Line Items]
Fair Value	$ 1,501