INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES - Summary of Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Real estate under development	$ 639,759		$ 609,574
Investments in and advances to unconsolidated affiliates	210,309		173,277
Total assets	3,148,327		3,032,319
Other liabilities	106,002		31,000
Total liabilities and equity	3,148,327		3,032,319
Distributions in excess of income from, and investments in, unconsolidated affiliates	(23,613)		(13,244)
Total revenues	52,683	$ 52,481
Operating Expenses	(38,194)	(37,333)
Equity in earnings of unconsolidated affiliates	1,954	6,593
Depreciation and amortization	(16,849)	(13,658)
Unconsolidated Affiliates
Schedule of Equity Method Investments [Line Items]
Rental property, net	553,827		302,976
Real estate under development	40,059		35,743
Investments in and advances to unconsolidated affiliates	6,853		6,853
Other assets	47,813		47,083
Total assets	648,552		392,655
Loans Payable to Bank	340,417		192,684
Other liabilities	22,950		21,945
Partners’ equity	285,185		178,026
Total liabilities and equity	648,552		$ 392,655
Total revenues	13,372	11,930
Operating Expenses	(3,730)	(3,857)
Interest Expense	(2,736)	(2,638)
Equity in earnings of unconsolidated affiliates	0	66,655
Depreciation and amortization	(3,880)	(2,307)
Income from continuing operations	3,026	69,783
Operating Partnership, as General Partner or Managing Member
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated affiliates	1,954	6,593
Company’s share of net income	2,052	6,691
Amortization of Excess Investment	$ (98)	$ (98)