MARKETABLE SECURITIES (Tables)

9 Months Ended

Sep. 30, 2023

MARKETABLE SECURITIES

Schedule of Available-for-sale Securities

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at September 30, 2023, were as follows:

	Amortized		Gross Unrealized				Estimated Fair
(In thousands)	Cost		Gains		Losses		Market Value
Investments due in 3 months or less:
Corporate securities	$	36,088	$	—	$	(207)	$	35,881
Total		36,088		—		(207)		35,881
Investments due in 4-12 months:
Corporate securities		39,377		4		(664)		38,717
Total		39,377		4		(664)		38,717
Investments due in 12 months or greater:
Corporate securities		189,271		18		(1,991)		187,298
Total		189,271		18		(1,991)		187,298
Total marketable securities	$	264,736	$	22	$	(2,862)	$	261,896

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at December 31, 2022, were as follows:

	Amortized		Gross Unrealized				Estimated Fair
(In thousands)	Cost		Gains		Losses		Market Value
Investments due in 3 months or less:
Corporate securities	$	21,803	$	—	$	(135)	$	21,668
Total		21,803		—		(135)		21,668
Investments due in 4-12 months:
Corporate securities		173,833		—		(4,019)		169,814
Total		173,833		—		(4,019)		169,814
Investments due in 12 months or greater:
Corporate securities		58,128		71		(1,240)		56,959
Total		58,128		71		(1,240)		56,959
Total marketable securities	$	253,764	$	71	$	(5,394)	$	248,441

Schedule of Available-for-sale Securities in an Unrealized Loss Position

The following table summarizes marketable securities classified as available-for-sale (excluding cash equivalents) in a continuous unrealized loss position for which an allowance for credit losses was not recorded at September 30, 2023:

	Less Than 12 Months				12 Months or Longer				Total
	Estimated		Gross		Estimated		Gross		Estimated		Gross
	Fair Market		Unrealized		Fair Market		Unrealized		Fair Market		Unrealized
(In thousands)	Value		Losses		Value		Losses		Value		Losses
Corporate securities	$	200,713	$	(2,001)	$	55,695	$	(861)	$	256,408	$	(2,862)
Total marketable securities	$	200,713	$	(2,001)	$	55,695	$	(861)	$	256,408	$	(2,862)