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PENSION, POST-RETIREMENT AND OTHER LONG-TERM EMPLOYEE BENEFITS - Sensitivity Analysis (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Percentage of reasonably possible increase in actuarial assumptions 1.00% 1.00%
Percentage of reasonably possible decrease in actuarial assumptions 1.00% 1.00%
Period of reasonably possible increase in life expectancy 1 year 1 year
Period of reasonably possible decrease in life expectancy 1 year 1 year
Discount rate    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption $ (10,988) $ (10,085)
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption 13,666 12,535
Mortality rate    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption 2,856 2,672
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption $ (2,892) $ (2,688)