Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Measurements

Schedule of assets measured at fair value on a recurring basis

As of December 31, 2021, the Company held certain assets that are required to be 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 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	$	—

	Fair Value Measurements as of December 31, 2020
	Total		Level 1		Level 2		Level 3
Marketable Securities
Bonds and bond funds	$	117,928	$	—	$	117,928	$	—
Commercial paper		492,257		—		492,257		—
	$	610,185	$	—	$	610,185	$	—
Cash and Cash Equivalents		215,723		215,723		—		—
Total Assets Measured at Fair Value	$	825,908	$	215,723	$	610,185	$	—