ORGANIZATION AND BASIS OF PRESENTATION Summary of General Terms and Operating Partnership's Equity Interests (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Fund I and Mervyns I
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Operating Partnership Share of Capital	22.22%	[1]
Committed Capital	$ 90.0	[1]
Capital Called as of June 30, 2013	86.6	[1],[2]
Ownership Interest By General Partner or Managing Partner	37.78%	[1]
Preferred Return	9.00%	[1]
Capital Returned as of June 30, 2013	86.6	[1],[2]
Fund II and Mervyns II
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Operating Partnership Share of Capital	20.00%	[3]
Committed Capital	300.0	[3]
Capital Called as of June 30, 2013	300.0	[2],[3]
Ownership Interest By General Partner or Managing Partner	20.00%	[3]
Preferred Return	8.00%	[3]
Capital Returned as of June 30, 2013	131.6	[2],[3]
Fund III
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Operating Partnership Share of Capital	19.90%
Committed Capital	475.0	[3]
Capital Called as of June 30, 2013	366.6	[2]
Ownership Interest By General Partner or Managing Partner	19.90%
Preferred Return	6.00%
Capital Returned as of June 30, 2013	262.6	[2]
Fund IV
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Operating Partnership Share of Capital	23.12%
Committed Capital	540.6	[3]
Capital Called as of June 30, 2013	121.0	[2]
Ownership Interest By General Partner or Managing Partner	23.12%
Preferred Return	6.00%
Capital Returned as of June 30, 2013	$ 0	[2]

[1] Fund I and Mervyns I have returned all capital and preferred return. The Operating Partnership is now entitled to a Promote on all future cash distributions.

[2] Represents the total for the Funds, including the Operating Partnership and noncontrolling interests' shares.

[3] During 2013, a distribution of $47.1 million was made to the Fund II investors, including the Operating Partnership. This amount is subject to recontribution to Fund II until December 2016, if needed to fund the on-going development and construction of existing projects.