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FAIR VALUE MEASUREMENTS AND INVESTMENTS - Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Roll forward of investments
Beginning balance	$ 38,169	$ 48,444
Income (Loss) recognized	315	(563)
Contributions / (distributions)	630
Foreign currency gain	111	256
Gain recognized		4,770
Ending balance	39,225	52,907
Investments without a readily determinable fair value
Roll forward of investments
Beginning balance	22,590	17,820
Gain recognized		4,770
Ending balance	22,590	22,590
Fair value investments
Roll forward of investments
Beginning balance	1,616	1,925
Income (Loss) recognized	77	99
Ending balance	1,693	2,024
Equity investments
Roll forward of investments
Beginning balance	13,963	28,699
Income (Loss) recognized	238	(662)
Contributions / (distributions)	630
Foreign currency gain	111	256
Ending balance	$ 14,942	$ 28,293

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27405-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(c),9(a))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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