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Commitments And Contingencies (Narrative) (Details) (USD $)
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12 Months Ended | 0 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||
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Dec. 31, 2011
sqft
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2011
Harborside Plaza 4-A Agreement [Member]
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Dec. 31, 2010
Harborside Plaza 4-A Agreement [Member]
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Dec. 31, 2009
Harborside Plaza 4-A Agreement [Member]
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Dec. 31, 2011
Harborside Plaza 5 Agreement [Member]
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Dec. 31, 2010
Harborside Plaza 5 Agreement [Member]
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Dec. 31, 2009
Harborside Plaza 5 Agreement [Member]
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Dec. 31, 2011
Property Lock-Ups [Member]
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Dec. 31, 2011
Property Lock-Ups Expired [Member]
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Dec. 05, 2011
Harborside Residential Project [Member]
sqft
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Dec. 31, 2011
Harborside Residential Project [Member]
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Dec. 31, 2011
Ironstate Development LLC [Member]
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Dec. 31, 2011
Vice President [Member]
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| Commitments And Contingencies [Line Items] | |||||||||||||||
| Project period (years) | 20 | 20 | |||||||||||||
| Percentage of PILOT on project cost | 2.00% | 2.00% | |||||||||||||
| Total project cost | $ 49,500,000 | $ 170,900,000 | |||||||||||||
| Payments in lieu of property taxes (PILOT) | 990,000 | 1,200,000 | 1,000,000 | 3,400,000 | 3,800,000 | 3,200,000 | |||||||||
| Ground lease expense incurred | 406,000 | 490,000 | 734,000 | ||||||||||||
| Properties aggregate net book value | 131,600,000 | 1,700,000,000 | |||||||||||||
| Expiration year | 2016 | ||||||||||||||
| Number of properties | 7 | 129 | |||||||||||||
| Percentage of interest in venture | 85.00% | ||||||||||||||
| Area of building in square feet | 203,000 | ||||||||||||||
| Lease term description | 15 years and three months, subject to two extension options of between five and 10 years each | ||||||||||||||
| Delivery date to tenant | first quarter of 2013 | ||||||||||||||
| Total estimated costs of the project | 53,500,000 | 400,000,000 | |||||||||||||
| Costs of the project incurred | 14,400,000 | ||||||||||||||
| 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.
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| Area of Property in Square foot | 2,000,000 | ||||||||||||||
| Number of apartment units in each tower | 500 | ||||||||||||||
| Ownership percentage of third party venture | 15.00% | ||||||||||||||
| Capital credit receivable per square foot | 30 | ||||||||||||||
| Compensation paid to vice president | $ 1,400,000 | ||||||||||||||