FAIR VALUE OF FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Fair Value Measurements within the Fair Value Hierarchy (Details) - Fair value measurements on recurring basis - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Fair value of assets and liabilities
Cash and Cash Equivalents	$ 464,448	$ 600,162
Short-Term Investments	32,807	7,500
Other Current Assets	12,110	15,528
Total assets	509,365	623,190
Cash
Fair value of assets and liabilities
Cash and Cash Equivalents	22,603	23,402
Short-Term Investments	0
Other Current Assets	0
Total assets	22,603	23,402
Level 1 | Money market funds
Fair value of assets and liabilities
Cash and Cash Equivalents	439,853	576,760
Short-Term Investments	0	0
Other Current Assets	0	0
Total assets	439,853	576,760
Level 1 | Assets of non-qualified retirement plan
Fair value of assets and liabilities
Cash and Cash Equivalents	0	0
Short-Term Investments	0	0
Other Current Assets	12,110	15,528
Total assets	12,110	15,528
Level 1 | U.S. Treasury securities
Fair value of assets and liabilities
Cash and Cash Equivalents	1,992
Short-Term Investments	25,307
Other Current Assets	0
Total assets	27,299
Level 1 | Certificates of deposit
Fair value of assets and liabilities
Cash and Cash Equivalents	0	0
Short-Term Investments	7,500	7,500
Other Current Assets	0	0
Total assets	$ 7,500	$ 7,500