ORGANIZATION AND BASIS OF PRESENTATION Summary of General Terms and Operating Partnership's Equity Interests (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 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	86.6	[1],[2]
Equity Interest Held By Operating Partnership	37.78%	[1]
Preferred Return	9.00%	[1]
Capital Returned	192.3	[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	300.0	[2],[3]
Equity Interest Held By Operating Partnership	20.00%	[3]
Preferred Return	8.00%	[3]
Capital Returned	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	372.0	[2]
Equity Interest Held By Operating Partnership	19.90%
Preferred Return	6.00%
Capital Returned	362.2	[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	121.0	[2]
Equity Interest Held By Operating Partnership	23.12%
Preferred Return	6.00%
Capital Returned	$ 95.9	[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.