Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities

Marketable securities at March 31, 2022 consisted of the following:

(In thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Current:
U.S. Treasuries	$	243,892	$	14	$	(352)	$	243,554
Government securities	24,753		—		(164)		24,589
Corporate debt securities	577,541		1		(2,182)		575,360
Total Current	846,186		15		(2,698)		843,503
Non-current:
U.S. Treasuries	29,695		—		(489)		29,206
Government securities	149,378		—		(3,341)		146,037
Corporate debt securities	81,825		—		(1,232)		80,593
Total Non-current	260,898		—		(5,062)		255,836
Total marketable securities	$	1,107,084	$	15	$	(7,760)	$	1,099,339

Marketable securities at December 31, 2021 consisted of the following:

(In thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Current:
U.S. Treasuries	$	269,109	$	—	$	(36)	$	269,073
Government securities	17,764		1		(10)		17,755
Corporate debt securities	530,490		3		(429)		530,064
Total Current	817,363		4		(475)		816,892
Non-current:
U.S. Treasuries	40,607		—		(23)		40,584
Government securities	148,820		—		(470)		148,350
Corporate debt securities	77,675		—		(234)		77,441
Total Non-current	267,102		—		(727)		266,375
Total marketable securities	$	1,084,465	$	4	$	(1,202)	$	1,083,267