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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Parenthetical) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]    
Reclassification to net income [1] $ 1,266 $ 1,007
[1] The Company reclassified amortization of prior service cost and actuarial loss for its retirement plan from accumulated other comprehensive loss to net income of $1.3 million and $1.0 million for the nine months ended September 30, 2018 and 2017, respectively.