Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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- Definition

Description of method used to allocate purchase price to assets acquired and liabilities assumed, including methodologies to estimate fair values of assets and liabilities (for example, third-party appraisal).

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This element represents a description of how the entity obtained control of the acquired entity.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Number of acquisitions of operating properties.

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Disposal group, Including Discontinued Operation Gain on Purchase of Business

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Business Combinations (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended						0 Months Ended		12 Months Ended
	Apr. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Feb. 29, 2012	Nov. 30, 2012 Minimum [Member]	Nov. 30, 2012 Maximum [Member]	Apr. 13, 2011 Palm Coast [Member]	Aug. 06, 2012 Tenancy In Common [Member]	Dec. 31, 2012 Shopping Centers [Member] property
Business Acquisition [Line Items]
Business combination, effective date	Apr. 01, 2010							Apr. 13, 2011
Ownership percentage in joint ventures	50.00%	75.00%			47.80%	20.00%	50.00%	50.00%	79.60%
Business combination, discount rate								8.00%
Business combination, control obtained description								Effective April 13, 2011, we acquired a partner’s 50% interest in an unconsolidated joint venture related to a development property in Florida, which resulted in the consolidation of this property. Management has determined that this transaction qualified as a business combination to be accounted for under the acquisition method.
Business combination, valuation description								The fair value measurement is based on both significant inputs for similar assets and liabilities in comparable markets and significant inputs that are not observable in the markets in accordance with our fair value measurements accounting policy. Key assumptions include third-party broker valuation estimates; a discount rate of 8%; a terminal capitalization rate for similar properties; and factors that we believe market participants would consider in estimating fair value.
Gain on Acquisition		$ 0	$ 4,559	$ 0
Number of operating properties acquired										4