USE OF DERIVATIVES, OFFSETTING DISCLOSURES AND CHANGES IN OTHER COMPREHENSIVE INCOME BY COMPONENT - Components of Income Statement and Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Income statement-related [Abstract]
Amount of gain (loss) reclassified from Accumulated other comprehensive income (loss)		$ (10,571)	$ (4,644)
Amortization of unrealized gain, net of unrealized losses on de-designated Derivatives		3,020
Realized and unrealized loss on non-designated Derivatives (net)	[1]	(21,657)
Other comprehensive income (loss)-related [Abstract]
Amount of (loss) gain recognized in Other comprehensive income		(8,551)	30,933
Interest Expense [Member]
Income statement-related [Abstract]
Decrease in interest expense and increase in Net (loss) income as a result of the use of Derivatives		10,571	4,644
Interest Expense [Member] | Secured Borrowings [Member]
Income statement-related [Abstract]
Amount of gain (loss) reclassified from Accumulated other comprehensive income (loss)		7,891	5,247
Amortization of unrealized gain, net of unrealized losses on de-designated Derivatives		3,020
Decrease in interest expense and increase in Net (loss) income as a result of the use of Derivatives	[2]	10,911	5,247
Interest Expense [Member] | Unsecured Borrowings [Member]
Income statement-related [Abstract]
Amount of gain (loss) reclassified from Accumulated other comprehensive income (loss)	[3]	$ (340)	$ (603)

[1] Included in “Loss on derivative instruments (net)” on the face of the Statement of Operations.

[2] Included in “Interest expense: Secured borrowings” on the face of the Statements of Operations.

[3] Included in “Interest expense: Unsecured borrowings” on the face of the Statements of Operations