DERIVATIVE INSTRUMENTS (Schedule of Derivative Notional Amounts) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of derivative instruments	$ 109,343	$ 202,609
Total Return Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of derivative instruments		18,278
Basis Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of derivative instruments	35,000	35,000
Interest rate cap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of derivative instruments	35,000	80,000
Interest rate swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of derivative instruments	35,000	65,000
Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of derivative instruments	$ 4,343	$ 4,331