DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Impact of Financial Instruments on Statement of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effect of the Company's derivative financial instruments on the income statement
Total Interest Expense Presented in the Results of Operations in which the Effects of Cash Flow Hedges are Recorded	$ 132,257	$ 105,374	$ 82,028
Interest Expense
Effect of the Company's derivative financial instruments on the income statement
Amount of Gain (Loss) Reclassified from AOCI into Operations	(9,064)	1,939	2,153
Interest Rate Swap
Effect of the Company's derivative financial instruments on the income statement
Amount of Gain (Loss) Recognized in AOCI on Derivatives	(32,134)	$ (19,245)	$ 2,090
Amount of Gain (Loss) Reclassified from AOCI into Operations	$ 3,200