MORTGAGE LOAN RECEIVABLES - Provision for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan losses at beginning of period	$ 3,850	$ 3,250	$ 3,700	$ 3,100
Provision for loan losses	150	150	300	300
Provision for loan losses at end of period	$ 4,000	$ 3,400	$ 4,000	$ 3,400