INVESTMENTS AND FAIR VALUE MEASUREMENTS - FINANCIAL INSTRUMENTS MEASURED AT FAIR VALUE ON RECURRING BASIS (Details) - Fair value, measurements, recurring - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets, Fair Value Disclosure [Abstract]
Certificates of deposit		$ 5,300
U.S. treasury securities	$ 58,958	25,798
Mutual funds	11,628	23,209
Equity securities	64,903	50,213
Corporate bonds	16,363	13,438
Total assets at fair value	151,852	117,958
Liabilities, Fair Value Disclosure [Abstract]
Derivative instruments	11,689	3,649
Total liabilities at fair value	11,689	3,649
Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
Certificates of deposit		0
U.S. treasury securities	58,958	25,798
Mutual funds	11,628	23,209
Equity securities	64,903	50,213
Corporate bonds	0	0
Total assets at fair value	135,489	99,220
Liabilities, Fair Value Disclosure [Abstract]
Derivative instruments	0	0
Total liabilities at fair value	0	0
Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Certificates of deposit		5,300
U.S. treasury securities	0	0
Mutual funds	0	0
Equity securities	0	0
Corporate bonds	16,363	13,438
Total assets at fair value	16,363	18,738
Liabilities, Fair Value Disclosure [Abstract]
Derivative instruments	11,689	3,649
Total liabilities at fair value	11,689	3,649
Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Certificates of deposit		0
U.S. treasury securities	0	0
Mutual funds	0	0
Equity securities	0	0
Corporate bonds	0	0
Total assets at fair value	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative instruments	0	0
Total liabilities at fair value	$ 0	$ 0