DISCONTINUED OPERATIONS - Revenue and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Expenses:
Income from operations of assets held for sale	$ 0	$ 1,668	$ 0	$ 2,358
Held for sale
DISCONTINUED OPERATIONS
Revenue—Interest and other income		2,416		3,531
Expenses:
Interest expense		588		876
Fees to related party		148		280
General and administrative		12		17
Total expenses		748		1,173
Income from operations of assets held for sale		$ 1,668		$ 2,358