Fair Value of Financial Assets and Liabilities - Summary of Estimated Fair Value and Amortized Cost of Available-for-Sale Investments by Contractual Maturity (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	$ 911,376,000	$ 879,005,000
Available For Sale Securities Accumulated Gross Unrealized Gains Before Tax	406,000	88,000
Available For Sale Securities Accumulated Gross Unrealized Losses Before Tax	(2,021,000)	(3,378,000)
Fair Value	909,761,000	875,715,000
Corporate Debt Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Due within in one year, Amortized cost	46,118,000	51,952,000
Due within one year, Amortized cost, Unrealized gains	10,000	1,000
Due within one year , Amortized cost, Unrealized losses	(118,000)	(170,000)
Due in one year or less, Fair value	46,010,000	51,783,000
Due after one year and less than two years, Amortized cost		11,983,000
Due after one year and less than three years, Amortized cost	18,735
Due after one year and less than two years, Amortized cost, Unrealized gains		0
Due after one year and less than two years, Amortized cost, Unrealized losses		(38,000)
Due after one year and less than two years, Fair value		11,945,000
Due after one year and less than three years, Fair value	18,736
Due within one year, Amortized cost, Unrealized losses	23
Due after one year and less than three years, Amortized cost, Unrealized gains	24
US Treasuries
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Due after one year and less than three years, Amortized cost	84,773,000	96,802,000
Due after one year and less than three years, Amortized cost, Unrealized losses	(225,000)	(620,000)
Due after one year and less than three years, Fair value	84,804,000	96,182,000
Due within in one year, Amortized cost	372,497,000	329,533,000
Due within one year, Amortized cost, Unrealized gains	62,000	17,000
Due within one year, Amortized cost, Unrealized losses	(1,258,000)	(2,044,000)
Due in one year or less, Fair value	371,301,000	327,506,000
Due after one year and less than three years, Amortized cost, Unrealized gains	256,000	0
US Government Agencies
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Due within in one year, Amortized cost	178,907,000	178,319,000
Due within one year, Amortized cost, Unrealized gains	54,000	54,000
Due within one year, Amortized cost, Unrealized losses	(156,000)	(108,000)
Due in one year or less, Fair value	178,805,000	178,265,000
Due after one year and less than two years, Amortized cost	25,287,000
Due after one year and less than two years, Amortized cost, Unrealized gains	0
US government agencies (due after one year and less than three years)		32,104,000
US government agencies (due after one year and less than three years)		0
US government agencies (due after one year and less than three years)		(181,000)
US government agencies (due after one year and less than three years)		31,923,000
Due after one year and less than two years, Amortized cost, Unrealized losses	(115,000)
Due after one year and less than two years, Fair value	25,172,000
Commercial Paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Due within in one year, Amortized cost	185,059,000	178,312,000
Due within one year, Amortized cost, Unrealized gains	0	16,000
Due within one year , Amortized cost, Unrealized losses	(126,000)	(217,000)
Due in one year or less, Fair value	$ 184,933,000	$ 178,111,000