Income Taxes - Summary of Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss carryforwards	$ 484,136	$ 517,787
Reserves and accruals	23,677	20,068
Research and development credits	248,381	230,586
Operating lease liabilities	183,359	153,145
Stock-based compensation	55,785	50,661
Depreciation and amortization	51,700	41,377
Section 174 capitalization	280,906	165,219
Other	6,190	286
Total deferred tax assets	1,334,134	1,179,129
Deferred tax liabilities:
Operating lease right-of-use assets	(111,164)	(128,517)
Other	4,357	0
Total deferred tax liabilities	(115,521)	(128,517)
Valuation allowance	(1,209,822)	(1,040,341)
Net deferred tax assets	$ 8,791	$ 10,271