FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS (Reclassification of Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest Expense	$ 16,626	$ 16,291	$ 49,818	$ 48,972
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized Loss From Cash Flow Hedge	$ 0	$ 0	$ 0	$ 1,000