DISCONTINUED OPERATIONS - Revenue and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Revenue - Interest and other income						$ 6,389	$ 14,544
Expenses:
Interest expense						1,944	132
Fees to related party						550	777
General and administrative						42	495
Total expenses						2,536	1,404
Income from operations of assets held for sale					$ 0	3,853	13,140
Gain on disposition of assets held for sale					0	0	5,151
NET INCOME FROM DISCONTINUED OPERATIONS	$ 792	$ 703	$ 1,668	$ 690	$ 0	$ 3,853	$ 18,291