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LITIGATION (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Loss Contingencies [Line Items]  
Accrual for Environmental Loss Contingencies, Revision in Estimates $ 1,050
Accrual for Environmental Loss Contingencies 6,500
Judicial Ruling [Member]  
Loss Contingencies [Line Items]  
Loss Contingency Accrual 1,620
Accrual for Environmental Loss Contingencies, Revision in Estimates 5,450
Unfavorable Regulatory Action [Member]  
Loss Contingencies [Line Items]  
Loss Contingency Accrual $ 5,450