INVESTMENT IN EQUITY SECURITIES - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Total equity method investments and other investments	$ 65,200	$ 50,087
BTY
Schedule of Equity Method Investments [Line Items]
Equity method investments	33,005	33,020
Sonmol
Schedule of Equity Method Investments [Line Items]
Equity method investments	5,710	5,598
Kali Care
Schedule of Equity Method Investments [Line Items]
Equity method investments	422	535
Desotec GmbH
Schedule of Equity Method Investments [Line Items]
Equity method investments	943	964
Purecycle
Schedule of Equity Method Investments [Line Items]
Other investments	20,595	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	$ 1,631	$ 1,679