Fair Value Measurement - Summary of Financial Assets Subject to Fair Value Measurements on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands		Jun. 30, 2022	Dec. 31, 2021
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets		$ 1,239,715	$ 1,440,920
Money Market Funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[1]	236,273	227,826
Commercial Paper
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[2]	163,032	233,400
U.S. Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[2]	626,655	722,310
Corporate Notes and Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[2]	213,755	257,384
Level 1
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets		236,273	227,826
Level 1 | Money Market Funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[1]	236,273	227,826
Level 2
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets		1,003,442	1,213,094
Level 2 | Commercial Paper
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[2]	163,032	233,400
Level 2 | U.S. Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[2]	626,655	722,310
Level 2 | Corporate Notes and Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value assets	[2]	$ 213,755	$ 257,384

[1] Money market funds are included in cash and cash equivalents on the Condensed Consolidated Balance Sheet.

[2] As of June 30, 2022 and December 31, 2021, marketable securities with original maturities of three months or less of $78.7 million and $86.1 million, respectively, are included in cash and cash equivalents on the Condensed Consolidated Balance Sheet.