OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income and Expenses [Abstract]
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Gain (Loss) Due to Settlement and Curtailment		$ (4,232)	$ (5,283)	$ (4,990)	$ (5,283)
Equity earnings in affiliates		542	766	3,301	2,001
Other income		1,334	1,401	3,647	3,293
Other components of net periodic pension (cost) income (1)	[1]	(2,950)	(2,570)	(130)	1,578
Total Other income (expense)		$ (1,074)	$ (403)	$ 6,818	$ 6,872

[1] Other components of net periodic pension (cost) income include pension settlement charges in the three and nine months ended September 30, 2018 of $4,232 and $4,990, respectively, and charges of $5,283 in the three and nine months ended September 30, 2017. Refer to Note 12 to the consolidated financial statements for details.