FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS (Cash Flow Hedge - Realized Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Realized Loss From Cash Flow Hedge	$ 0	$ 1,000	$ 1,000
Interest Expense	$ 67,620	$ 65,290	$ 65,902