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Investments In Unconsolidated Joint Ventures (Red Bank Corporate Plaza) (Details) (Red Bank Corporate Plaza [Member], USD $)
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0 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | ||
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Sep. 22, 2011
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May 31, 2011
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Sep. 30, 2012
sqft
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Sep. 30, 2011
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Sep. 30, 2012
sqft
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Sep. 30, 2011
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Red Bank Corporate Plaza [Member]
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| Schedule of Equity Method Investments [Line Items] | ||||||
| Area of office property, square feet | 92,878 | 92,878 | ||||
| Lease expiration date | Sep. 30, 2017 | |||||
| Percentage of interest in venture | 50.00% | 50.00% | ||||
| Mortgage loans, carrying amount | $ 20,300,000 | |||||
| Spread over LIBOR | 1.25% | 3.00% | 3.00% | |||
| Previous maturity date of mortgage loan | May 01, 2011 | |||||
| Mortgage loan, maturity date | May 17, 2016 | |||||
| Repayment of mortgage loan | 1,700,000 | |||||
| New mortgage loan | 17,500,000 | |||||
| LIBOR Interest Rate | 0.21% | 0.21% | ||||
| Percentage of loan principal swapped | 75.00% | |||||
| Fixed interest rate | 3.99375% | |||||
| Management, leasing and other services fees | $ 25,000 | $ 24,000 | $ 75,000 | $ 72,000 | ||