OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Income and Expenses [Abstract]
Income (Loss) from Equity Method Investments		$ 5,481	$ 2,742	$ 2,928
Defined Benefit Plan, Other (Cost) Credit	[1]	502	769	4,660
Other Nonoperating Income (Expense)		4,703	5,215	3,173
Total other income (expense)		$ 10,686	$ 8,726	$ 10,761

[1] Other components of net periodic pension (cost) income includes pension settlements and curtailments. Refer to Note 12 to the consolidated financial statements for details.