Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Other) (Narrative) (Details)

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Commitments And Contingencies (Other) (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 3 Months Ended
Mar. 31, 2014
Property Lock-Ups [Member]
property
Mar. 31, 2014
Property Lock-Ups Expired [Member]
property
Mar. 31, 2014
Harborside Residential Project [Member]
property
Oct. 31, 2013
Harborside Residential Project [Member]
Mar. 31, 2014
Harborside Residential Project [Member]
Parent Company [Member]
Mar. 31, 2014
Wegmans Food Markets, Inc. [Member]
Jul. 31, 2012
Wegmans Food Markets, Inc. [Member]
sqft
Commitments And Contingencies [Line Items]              
Number of properties 7 121          
Properties aggregate net book value $ 123.1 $ 1,500.0          
Expiration year 2016            
Number of apartments     763        
Total estimated costs of the project     320        
Costs of the project incurred     10.2     5.0  
Delivery date to tenant     third quarter of 2016     fourth quarter of 2014  
State tax credit       33      
Percentage of interest in venture     85.00%        
Ownership percentage of third party venture     15.00%        
Capital credit receivable (per square foot)     30        
Aggregate capital credits     20.6        
Amount to fund         88    
Area of property (in square feet)             140,000
Total project costs           $ 15.7  
Holding and distribution pattern under operating agreement     Pursuant to the Development Agreement, the Company and Ironstate shall co-develop the URL Harborside Project with Ironstate responsible for obtaining all required development permits and approvals. Major decisions with respect to the URL Harborside Project will require the consent of the Company and Ironstate. The Company and Ironstate will have 85 and 15 percent interests, respectively, in the URL Harborside Project. The Company will receive capital credit of $30 per approved developable square foot for its land aggregating to approximately $20.6 million at March 31, 2014. In addition to the capital credit it will receive for its land contribution, the Company currently expects that it will fund approximately $88 million of the development costs of the project (which is expected to be reduced due to the effects of sales proceeds from the anticipated sale of the URL Tax Credits).