INVESTMENT IN EQUITY SECURITIES - Balances of Equity Method Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Equity Method Investments and Other Investments	$ 50,087	$ 8,396
BTY
Schedule of Equity Method Investments [Line Items]
Equity method investments	33,020	119
Sonmol
Schedule of Equity Method Investments [Line Items]
Equity method investments	5,598	0
Kali Care
Schedule of Equity Method Investments [Line Items]
Equity method investments	535	3,881
Desotec GmbH
Schedule of Equity Method Investments [Line Items]
Equity method investments	964	858
PureCycle
Schedule of Equity Method Investments [Line Items]
Other Investments	5,397	1,000
Loop
Schedule of Equity Method Investments [Line Items]
Other Investments	2,894	2,538
Others
Schedule of Equity Method Investments [Line Items]
Other Investments	$ 1,679	$ 0