COMMITMENTS AND CONTINGENCIES (Other Commitments and Contingencies) (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($) Milestone	Dec. 31, 2020 USD ($)
Maximum
Long-term Purchase Commitment [Line Items]
Repurchase collateral amount	$ 42,326	$ 56,822
Capital Addition Purchase Commitments
Long-term Purchase Commitment [Line Items]
Commitment amount	5,012	7,068
Software License Fee Arrangement
Long-term Purchase Commitment [Line Items]
Commitment amount	$ 3,754	$ 5,266
Number of milestones completed | Milestone	1
Number of milestones remaining | Milestone	2
Commitment period	3 years