COMMITMENTS AND CONTINGENCIES (Detail Textuals) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Long-term Purchase Commitment [Line Items]
Maximum repurchase collateral amount	$ 52,379	$ 54,093
Capital Addition Purchase Commitments
Long-term Purchase Commitment [Line Items]
Commitment for construction and acquisition of property, plant and equipment	$ 5,586