Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Net operating loss carryforwards	$ 818,284	$ 810,278
Accruals and reserves	80,185	73,535
Stock-based compensation	31,673	28,238
Research and development credits	237,447	175,746
Intangibles	135,500	135,500
Capitalized research and development expenses	230,302	299,061
Lease liability	21,499	30,697
Investments and other basis differences	126,369	81,248
Other	8,992	18,139
Gross deferred tax assets	1,690,251	1,652,442
Valuation allowance	(1,554,727)	(1,488,328)
Net deferred tax assets	135,524	164,114
Deferred tax liabilities:
Capitalized software	(39,022)	(38,394)
Prepaid expenses	(863)	(900)
Acquired intangibles	(32,633)	(55,283)
Right-of-use asset	(8,913)	(13,112)
Deferred commissions	(37,173)	(42,313)
Net deferred tax asset	$ 16,920	$ 14,112