DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Impact of Financial Instruments on Statement of Operations) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effect of the Company's derivative financial instruments on the income statement
Interest rate derivatives	[1]		$ 955	$ (9)
Interest expense		$ 105,374	82,028	64,568
Interest Expense
Effect of the Company's derivative financial instruments on the income statement
Interest expense		(770)
Interest expense			1,135	(905)
Interest rate swap contracts
Effect of the Company's derivative financial instruments on the income statement
Interest expense		3,800
Cash Flow Hedging | Interest rate swap contracts
Effect of the Company's derivative financial instruments on the income statement
Interest rate derivatives		$ (19,245)
Interest rate derivatives			$ 2,090	$ (726)

[1] Amounts are shown net of deferred tax benefit of $5.0 million for the year ended December 31, 2019 and $0.3 million for the years ended December 31, 2018 and 2017.