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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Parenthetical) (Details) - USD ($)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]    
Reclassification to net income [1] $ 1,269,000 $ 844,000
[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 $844,000 for the six months ended June 30, 2019 and 2018, respectively.