Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Narrative) (Details)

v2.4.0.6
Commitments And Contingencies (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Harborside Plaza 4-A Agreement [Member]
Jun. 30, 2011
Harborside Plaza 4-A Agreement [Member]
Jun. 30, 2012
Harborside Plaza 4-A Agreement [Member]
Jun. 30, 2011
Harborside Plaza 4-A Agreement [Member]
Jun. 30, 2012
Harborside Plaza 5 Agreement [Member]
Jun. 30, 2011
Harborside Plaza 5 Agreement [Member]
Jun. 30, 2012
Harborside Plaza 5 Agreement [Member]
Jun. 30, 2011
Harborside Plaza 5 Agreement [Member]
Jun. 30, 2012
Property Lock-Ups [Member]
Jun. 30, 2012
Property Lock-Ups Expired [Member]
Dec. 31, 2011
Harborside Residential Project [Member]
Dec. 31, 2011
Harborside Residential Project [Member]
Jun. 30, 2012
Ironstate Development LLC [Member]
Aug. 31, 2011
Wyndham [Member]
sqft
item
Jun. 30, 2012
Wyndham [Member]
Jun. 30, 2012
Wyndham [Member]
Land [Member]
Jun. 30, 2012
Maximum [Member]
Wyndham [Member]
Jun. 30, 2012
Minimum [Member]
Wyndham [Member]
Commitments And Contingencies [Line Items]                                            
Project period             20 years       20 years                      
Percentage of PILOT on project costs             2.00%       2.00%                      
Total project costs             $ 49,500,000       $ 170,900,000                      
Payments in lieu of property taxes (PILOT)         247,000 247,000 495,000 495,000 854,000 854,000 1,700,000 1,700,000                    
Ground lease expense incurred 102,000 102,000 203,000 203,000                                    
Number of properties                         7 128                
Properties aggregate net book value                         130,000,000 1,700,000                
Expiration year                         2016                  
Area of building, square feet                                   203,000        
Lease term                                   15 years 3 months        
Number of lease extension options                                   2        
Lease extension term                                         10 years 5 years
Delivery date to tenant                                   first quarter of 2013        
Total estimated costs of the project                             230,000,000     53,500,000        
Costs of the project incurred                                     $ 22,800,000 $ 12,900,000    
Number of apartment units in each tower                             750 750            
Holding and distribution pattern under operating agreement                             Pursuant to the Development Agreement, the Company and Ironstate shall co-develop the Harborside Residential Project with Ironstate responsible for obtaining all required development permits and approvals. Major decisions with respect to the Harborside Residential Project will require the consent of the Company and Ironstate. The Company and Ironstate will have 85 and 15 percent interests, respectively, in the Harborside Residential Project. The Company will receive capital credit of $30 per approved developable square foot for its land.              
Percentage of interest in venture                             85.00% 85.00%            
Ownership percentage of third party venture                                 15.00%          
Capital credit receivable per square foot                               30