DERIVATIVE INSTRUMENTS (Summary of Derivative Activity) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains of derivative instruments	$ (584)	$ (1,872)	$ (2,295)	$ (3,314)
Total Return Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains of derivative instruments	0	(38)	0	(42)
Net proceeds from derivative instrument				200
Basis Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains of derivative instruments	143	(180)	(936)	(253)
Net proceeds from derivative instrument		100		100
Interest rate cap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains of derivative instruments	(18)	(86)	(154)	(563)
Interest rate swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains of derivative instruments	(466)	(1,395)	(2,044)	(2,276)
Net proceeds from derivative instrument				200
Payments For Proceeds From Derivative Instrument Operating Activities		100
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains of derivative instruments	(207)	(173)	875	(180)
Gain Share Arrangement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains of derivative instruments	$ (36)	$ 0	$ (36)	$ 0