FAIR VALUE MEASUREMENTS Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable and preferred equity investments, net	$ 273,542	$ 147,188
Mortgage and other notes payable	1,244,765	1,358,606
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable and preferred equity investments, net	273,542	147,188
Mortgage and other notes payable	$ 1,272,251	$ 1,382,318