Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Measurements

Schedule of assets measured at fair value on a recurring basis

Assets measured at fair value on a recurring basis are summarized below (in thousands):

	Fair Value Measurements as of March 31, 2022
	Total		Level 1		Level 2		Level 3
Marketable Securities
Bonds and bond funds	$	170,918	$	—	$	170,918	$	—
Commercial paper		439,532		—		439,532		—
	$	610,450	$	—	$	610,450	$	—
Cash and Cash Equivalents		246,001		246,001		—		—
Total Assets Measured at Fair Value	$	856,451	$	246,001	$	610,450	$	—

	Fair Value Measurements as of December 31, 2021
	Total		Level 1		Level 2		Level 3
Marketable Securities
Bonds and bond funds	$	54,673	$	—	$	54,673	$	—
Commercial paper		547,316		—		547,316		—
	$	601,989	$	—	$	601,989	$	—
Cash and Cash Equivalents		258,421		258,421		—		—
Total Assets Measured at Fair Value	$	860,410	$	258,421	$	601,989	$	—