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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 735 $ 4,439 $ 1,469 $ 8,869
Interest cost 5,542 6,018 11,074 12,029
Expected return on plan assets (8,626) (8,894) (17,241) (17,758)
Amortization of prior service cost 4 (99) 8 (198)
Amortization of net loss [1] 1,011 3,648 2,011 6,314
Defined benefit plans (1,334) 5,112 (2,679) 9,256
Multi-employer plans 224 193 417 395
Defined contribution plans 5,804 2,192 12,568 4,161
Total pension cost [2] $ 4,694 7,497 $ 10,306 13,812
VENEZUELA        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Amortization of net loss   $ 959   $ 959
[1] (1) The amortization of net loss includes a $959 charge resulting from the deconsolidation of the Venezuelan subsidiary during the three and six months ended June 30, 2016.
[2] (2) The decrease for the three and six months ended June 30, 2017 as compared to the prior year periods reflect lower service cost and lower amortization of net losses related to the defined benefit plan freeze effective December 31, 2016, partially offset by higher defined contribution plan expense related to the Company's amended U.S. defined contribution plan that was effective January 1, 2017.