Summary Of Significant Accounting Policies And Recent Accounting Pronouncements (Expected Useful Lives Of Depreciable Property) (Details)	3 Months Ended
Mar. 31, 2012
Intangible assets (in-place leases and above and below market leases)	underlying lease term
Buildings 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)	5
Maximum Estimated Useful Life (in years)	20

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration