DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Impact of Financial Instruments on Statement of Operations) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Effect of the Company's derivative financial instruments on the income statement
Interest rate derivatives	[1]		$ (367)		$ 13,031
Interest expense		$ 28,829	21,670	$ 76,358	57,182
Interest expense
Effect of the Company's derivative financial instruments on the income statement
Interest expense		(199)		21
Interest expense			394		1,262
Interest rate derivatives
Effect of the Company's derivative financial instruments on the income statement
Interest rate derivatives		(6,406)		(25,238)
Interest expense		$ 1,000		$ 3,000
Cash Flow Hedging | Interest rate derivatives
Effect of the Company's derivative financial instruments on the income statement
Interest rate derivatives			$ 28		$ 14,293

[1] Amounts are shown net of deferred tax benefit of $1.7 million and $0.2 million for the three months ended September 30, 2019 and 2018, respectively, and deferred tax benefit of $7.0 million and deferred tax expense of $3.7 million for the nine months ended September 30, 2019 and 2018, respectively.