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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Expected Useful Lives of Depreciable Property) (Details)	6 Months Ended
	Jun. 30, 2011
Intangible assets (in-place leases and above and below market leases)	underlying lease term
Building and Improvements [Member]
Minimum Estimated Useful Life (in Years)	5
Maximum Estimated Useful Life (in Years)	35
Furniture, Fixtures, Equipment, and Other [Member]
Minimum Estimated Useful Life (in Years)	3
Maximum Estimated Useful Life (in Years)	20

X

- Definition

Expected useful lives of intangible assets related to in-place leases and above and below market leases.

+ Details

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X

- Definition

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land and improvements, buildings, and production equipment.

+ Details

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Namespace Prefix:	us-gaap
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Balance Type:	na
Period Type:	duration

X

- Definition

The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land and improvements, buildings, and production equipment.

+ Details

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Namespace Prefix:	us-gaap
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Balance Type:	na
Period Type:	duration