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Investments In Unconsolidated Joint Ventures (Gale Jefferson, L.L.C.) (Narrative) (Details) (USD $)
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0 Months Ended | 3 Months Ended | |
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Jan. 04, 2013
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Mar. 31, 2013
sqft
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Mar. 31, 2012
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One Jefferson [Member]
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| Schedule of Equity Method Investments [Line Items] | |||
| Percentage of interest in venture | 8.33% | ||
| Mortgage loans, carrying amount | $ 20,200,000 | ||
| Spread over LIBOR | 1.60% | ||
| Mortgage loan, maturity date | October 2013 | ||
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Gale Jefferson, L.L.C. [Member]
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| Schedule of Equity Method Investments [Line Items] | |||
| Rentable Square Feet | 100,010 | ||
| Lease expiration date | Aug. 01, 2025 | ||
| Venture sale of real estate | 3,200,000 | ||
| Share of gain on sale of real estate | 1,100,000 | ||
| Management, leasing and other services fees | $ 16,000 | $ 48,000 | |