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RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Components of Pension Cost for Defined Benefit Plans) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Components of Pension Cost for Defined Benefit Plan          
Service cost     $ 3,286 $ 17,689 $ 19,933
Interest cost     22,750 23,578 36,002
Expected return on plan assets     (35,800) (35,716) (54,638)
Amortization of prior service cost     15 (394) (626)
Amortization of net loss [1]     4,014 9,893 19,406
Settlement/curtailment loss $ (2,867) $ (5,283) (8,252) [2] 1,062 [2] (142,738) [2]
Pension cost for defined benefit plans [3]     $ 2,517 13,988 $ 162,815
VENEZUELA          
Components of Pension Cost for Defined Benefit Plan          
Amortization of net loss       $ 959  
[1] The amortization of net loss includes a $959 charge resulting from the deconsolidation of the Venezuelan subsidiary during the year ended December 31, 2016.
[2] Pension settlement charges for the year ended December 31, 2017 resulting from lump sum pension payments. For the year ended December 31, 2015, the Company recorded pension settlement charges of $142,738, primarily related to the purchase of the group annuity contract.
[3] The decrease in pension cost for defined benefit plans for the year ended December 31, 2017 was due to the U.S. plan freeze effective December 31, 2016.