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OTHER INCOME (EXPENSE) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Other Income and Expenses [Abstract]        
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Gain (Loss) Due to Settlement and Curtailment       $ (758)
Equity earnings in affiliates $ 1,790 $ 1,559 $ 2,796 2,759
Other income 1,631 1,070 3,622 2,313
Other components of net periodic pension (cost) income (1) [1] 775 1,812 1,541 2,820
Total Other income (expense) $ 4,196 $ 4,441 $ 7,959 $ 7,892
[1]
(1) Includes pension settlement charges in the six months ended June 30, 2018 of $758. Refer to Note 13 to the consolidated financial statements for details.