Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-sale Marketable Securities

The following table summarizes the Company’s available-for-sale marketable securities as of September 30, 2023 and December 31, 2022 at net book value:

	September 30, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(In thousands)
Marketable securities:
U.S. Treasury and other government-backed securities	$	330,875	$	3	$	(935	)	$	329,943
Financial institution debt securities		319,226		40		(688	)		318,578
Corporate debt securities		115,344		4		(306	)		115,042
Other asset-backed securities		61,188		-		(238	)		60,950
Total	$	826,633	$	47	$	(2,167	)	$	824,513
	December 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(In thousands)
Marketable securities:
U.S. Treasury and other government-backed securities	$	244,562	$	62	$	(1,938	)	$	242,686
Financial institution debt securities		380,891		-		(1,030	)		379,861
Corporate debt securities		102,059		-		(509	)		101,550
Other asset-backed securities		14,703		-		(346	)		14,357
Total	$	742,215	$	62	$	(3,823	)	$	738,454