FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures Abstract

Fair Value of Cash Equivalents and Marketable Securities

The fair value hierarchy of the Company’s cash equivalents and marketable securities at December 31, 2021, and 2020, was as follows:

	Fair Value Measurement at
	December 31, 2021
			Quoted Prices in
			Active Markets for		Significant Other
			Identical Assets		Observable Inputs
(In thousands)	Total Fair Value		(Level 1)		(Level 2)
Commercial paper	$	172,237	$	—	$	172,237
Corporate securities		282,540		—		282,540
Money market funds		29,793		29,793		—
Total	$	484,570	$	29,793	$	454,777

	Fair Value Measurement at
	December 31, 2020
			Quoted Prices in
			Active Markets for		Significant Other
			Identical Assets		Observable Inputs
(In thousands)	Total Fair Value		(Level 1)		(Level 2)
Commercial paper	$	253,855	$	—	$	253,855
Corporate securities		146,658		—		146,658
Money market funds		1,634		1,634		—
Total	$	402,147	$	1,634	$	400,513