SIGNIFICANT ACCOUNTING POLICIES - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Interest expense	$ 12,232	$ 8,415	$ 23,020	$ 16,940
Secured funding agreements and securitizations debt
Debt Instrument [Line Items]
Interest expense	8,855	6,657	16,323	13,425
Secured term loan
Debt Instrument [Line Items]
Interest expense	$ 3,377	$ 1,758	$ 6,697	$ 3,515