INVESTMENT IN EQUITY SECURITIES - Schedule of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Total equity method investments and other investments	$ 66,102	$ 50,087
BTY
Schedule of Equity Method Investments [Line Items]
Equity method investments	32,632	33,020
Sonmol
Schedule of Equity Method Investments [Line Items]
Equity method investments	5,400	5,598
Kali Care
Schedule of Equity Method Investments [Line Items]
Equity method investments	456	535
Desotec GmbH
Schedule of Equity Method Investments [Line Items]
Equity method investments	897	964
Purecycle
Schedule of Equity Method Investments [Line Items]
Other investments	22,206	5,397
Loop
Schedule of Equity Method Investments [Line Items]
Other investments	2,894	2,894
Others
Schedule of Equity Method Investments [Line Items]
Other investments	$ 1,617	$ 1,679