OTHER INCOME AND EXPENSE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	$ (8,824)	$ (17,252)	$ (19,827)
Other Nonoperating Expense	2,535	2,727	43
Other Nonoperating Income (Expense)	$ 11,359	$ 14,525	$ 19,870