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Marketable Securities (Tables)

6 Months Ended

Jun. 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)
June 30, 2024
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less		$	193,249		$	—		$	(172)		$	193,077
Maturing after one year through three years			124,096			—			(383)			123,713
Total U.S. government and municipal obligations		$	317,345		$	—		$	(555)		$	316,790
Corporate debt securities
Maturing in one year or less		$	403,773		$	125		$	(314)		$	403,584
Maturing after one year through three years			39,276			12			(84)			39,204
Total corporate debt securities		$	443,049		$	137		$	(398)		$	442,788
Total marketable securities		$	760,394		$	137		$	(953)		$	759,578


		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