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Investments In Unconsolidated Joint Ventures (Overlook Ridge JV 2C/3B, L.L.C.) (Narrative) (Details) (USD $)
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6 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | 12 Months Ended | |||||||||||||||
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Jun. 30, 2013
item
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Jul. 15, 2013
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Jun. 30, 2013
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Jun. 30, 2013
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Jun. 30, 2013
Overlook Ridge Apartments Member L.L.C. [Member]
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Jun. 30, 2013
Overlook Ridge JV 2C/3B, L.L.C. [Member]
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Dec. 31, 2012
Overlook Ridge JV 2C/3B, L.L.C. [Member]
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Jun. 30, 2013
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Overlook Ridge Apartments Member L.L.C. [Member]
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Dec. 31, 2012
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Rowe [Member]
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Dec. 31, 2012
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Parent Company [Member]
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Jun. 30, 2013
Overlook Ridge 2C 3B's Interest In Overlook Ridge Apartments Investors [Member]
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Jun. 30, 2013
Overlook 2C 3B Project [Member]
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Jun. 30, 2013
Overlook 2C 3B Project [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Jun. 30, 2013
Overlook 2C 3B Project [Member]
Overlook Ridge JV 2C/3B, L.L.C. [Member]
property
item
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Jun. 30, 2013
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
item
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Jan. 18, 2013
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Jun. 30, 2013
Construction Loan [Member]
Overlook 2C 3B Project [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Jun. 30, 2013
Construction Loan Extension Number 1 [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Dec. 31, 2012
Construction Loan Extension Number 2 [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Jun. 30, 2013
Minimum [Member]
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Jun. 30, 2013
Minimum [Member]
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
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Jun. 30, 2013
Maximum [Member]
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Jun. 30, 2013
Maximum [Member]
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
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| Schedule of Equity Method Investments [Line Items] | |||||||||||||||||||||||
| Indirect residual ownership percentage | 25.00% | ||||||||||||||||||||||
| Number of units | 371 | ||||||||||||||||||||||
| Number of real estate properties | 4 | ||||||||||||||||||||||
| Percentage of interest in venture | 50.00% | 7.50% | 80.00% | ||||||||||||||||||||
| Investment ownership percentage | 50.00% | ||||||||||||||||||||||
| Total project costs | $ 79,400,000 | $ 23,900,000 | |||||||||||||||||||||
| Maximum borrowing capacity | 600,000,000 | 600,000,000 | 55,500,000 | 55,500,000 | |||||||||||||||||||
| Amount outstanding | 0 | ||||||||||||||||||||||
| Percentage of operating return on capital | 6.50% | ||||||||||||||||||||||
| Capital balance | 22,600,000 | ||||||||||||||||||||||
| Accumulated unpaid operating return | 700,000 | ||||||||||||||||||||||
| Percentage of capital event cash flows distributed | 100.00% | ||||||||||||||||||||||
| Initial internal rate of return | 9.00% | ||||||||||||||||||||||
| Percentage of capital event cash flows distributed after initial internal rate of return reached | 70.00% | 30.00% | |||||||||||||||||||||
| Internal rate of return | 11.00% | ||||||||||||||||||||||
| Spread over LIBOR | 1.25% | 2.50% | |||||||||||||||||||||
| Loan maturity date | Dec. 01, 2015 | ||||||||||||||||||||||
| Number of extension options | 2 | 2 | |||||||||||||||||||||
| Loan extension period | 1 year | ||||||||||||||||||||||
| Extension fee | 0.25% | 0.25% | |||||||||||||||||||||
| Amount of debt guaranteed by company | 8,300,000 | ||||||||||||||||||||||
| Threshold of payment guarantee termination, debt service coverage ratio | 1.25 | ||||||||||||||||||||||
| Percentage of loan that has a fixed interest rate | 95.00% | ||||||||||||||||||||||
| Interest rate | 3.0875% | ||||||||||||||||||||||
| Percentage return on unrecovered capital | 9.00% | ||||||||||||||||||||||
| Unrecovered notional capital | 7,200,000 | 200,000 | |||||||||||||||||||||
| Development management and other services fees | $ 109,000 | $ 178,000 | |||||||||||||||||||||
| Holding and distribution pattern under operating agreement | In general, the operating agreement of Overlook Apartments Investors provides that operating cash flows are distributed to members first to Overlook Apartments Member and then to Overlook 2C/3B based on a 6.5 percent preferred return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages. | ||||||||||||||||||||||