Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2025

Fair Value Disclosures [Abstract]

Schedule of financial assets measured at fair value on a recurring basis

The following tables provide the financial assets measured at fair value on a recurring basis:

	Amortized Cost or Carrying Value		Gross Unrealized Gains		Gross Unrealized Losses Less Than 12 Months		Gross Unrealized Losses More Than 12 Months		Fair Value Hierarchy as of December 31, 2025						Aggregate Fair Value
									Level 1		Level 2		Level 3
Financial Assets:	(In thousands)
Cash and cash equivalents:
Money market funds	$	454,505	$	—	$	—	$	—	$	454,505	$	—	$	—	$	454,505
Commercial paper	37,517		—		—		—		—		37,517		—		37,517
Total included in cash     and cash equivalents	492,022		—		—		—		454,505		37,517		—		492,022
Marketable securities:
Debt securities:
U.S. Treasury securities	249,396		1,190		(9)		—		250,577		—		—		250,577
Corporate debt securities and commercial paper	1,523,935		9,360		(84)		(1)		—		1,533,210		—		1,533,210
Total debt securities	1,773,331		10,550		(93)		(1)		250,577		1,533,210		—		1,783,787
Equity securities	4,220		—		—		—		4,220		—		—		4,220
Total marketable    securities	1,777,551		10,550		(93)		(1)		254,797		1,533,210		—		1,788,007
Total financial assets	$	2,269,573	$	10,550	$	(93)	$	(1)	$	709,302	$	1,570,727	$	—	$	2,280,029

	Amortized Cost or Carrying Value		Gross Unrealized Gains		Gross Unrealized Losses Less Than 12 Months		Gross Unrealized Losses More Than 12 Months		Fair Value Hierarchy as of December 31, 2024						Aggregate Fair Value
									Level 1		Level 2		Level  3
Financial Assets:	(In thousands)
Cash and cash equivalents:
Money market funds	$	207,323	$	—	$	—	$	—	$	207,323	$	—	$	—	$	207,323
Commercial paper	15,059		—		—		—		—		15,059		—		15,059
U.S. Treasury bills	2,748		—		—		—		2,748		—		—		2,748
Total included in cash     and cash equivalents	225,130		—		—		—		210,071		15,059		—		225,130
Marketable securities:
Debt securities:
U.S. Treasury securities	379,846		1,243		(296)		(55)		380,738		—		—		380,738
Non-U.S. government    securities	2,909		27		—		—		2,936		—		—		2,936
Corporate debt securities and commercial paper	1,571,944		6,415		(1,594)		(557)		16,890		1,559,318		—		1,576,208
Total debt securities	1,954,699		7,685		(1,890)		(612)		400,564		1,559,318		—		1,959,882
Equity securities	3,220		—		—		—		3,220		—		—		3,220
Total marketable    securities	1,957,919		7,685		(1,890)		(612)		403,784		1,559,318		—		1,963,102
Total financial assets	$	2,183,049	$	7,685	$	(1,890)	$	(612)	$	613,855	$	1,574,377	$	—	$	2,188,232

Schedule of contractual maturities of marketable securities

The following table summarizes the contractual maturities of marketable securities:

	As of December 31,
	2025				2024
	Amortized Cost		Aggregate Fair Value		Amortized Cost		Aggregate Fair Value
Financial Assets:	(In thousands)
Less than one year	$	588,022	$	590,997	$	684,294	$	685,091
One to three years	1,185,309		1,192,790		1,270,405		1,274,791
Total	$	1,773,331	$	1,783,787	$	1,954,699	$	1,959,882