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Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2024

Marketable Securities

Schedule of marketable debt securities, classified as available-for-sale


		Amortized			Gross Unrealized			Gross Unrealized			Fair
		Cost			Gains			Losses			Value

		(In thousands)
September 30, 2024
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less		$	196,235		$	729		$	—		$	196,964
Maturing after one year through three years			107,595			1,081			—			108,676
Total U.S. government and municipal obligations		$	303,830		$	1,810		$	—		$	305,640
Corporate debt securities
Maturing in one year or less		$	375,022		$	704		$	(5)		$	375,721
Maturing after one year through three years			38,057			187			(5)			38,239
Total corporate debt securities		$	413,079		$	891		$	(10)		$	413,960
Total marketable securities		$	716,909		$	2,701		$	(10)		$	719,600


		Amortized			Gross Unrealized			Gross Unrealized			Fair
		Cost			Gains			Losses			Value

		(In thousands)
December 31, 2023
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less		$	132,459		$	143		$	(53)		$	132,549
Maturing after one year through three years			26,009			77			—			26,086
Total U.S. government and municipal obligations		$	158,468		$	220		$	(53)		$	158,635
Corporate debt securities
Maturing in one year or less		$	183,625		$	300		$	(10)		$	183,915
Maturing after one year through three years			45,977			257			—			46,234
Total corporate debt securities		$	229,602		$	557		$	(10)		$	230,149
Total marketable securities		$	388,070		$	777		$	(63)		$	388,784