| Investments In Unconsolidated Joint Ventures (PruRose Riverwalk G, L.L.C.) (Narrative) (Details) (USD $) | 9 Months Ended | 3 Months Ended | 9 Months Ended | 9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep. 30, 2013 | Jul. 15, 2013 | Sep. 30, 2013
 West New York Parcel G Apartments Investors, L.L.C. [Member] | Sep. 30, 2013
 Riverwalk G Urban Renewal, L.L.C. [Member] | Sep. 30, 2013
 Riverwalk G Urban Renewal, L.L.C. [Member] | Sep. 30, 2013
 Prudential [Member] | Sep. 30, 2013
 PruRose Riverwalk G, L.L.C. [Member] | Oct. 23, 2012
 PruRose Riverwalk G, L.L.C. [Member]
 item | Sep. 30, 2013
 PruRose Riverwalk G, L.L.C. [Member]
 West New York Parcel G Apartments Investors, L.L.C. [Member] | Oct. 23, 2012
 PruRose Riverwalk G's Interest In Riverwalk G Urban Renewal [Member] | Sep. 30, 2013
 Construction Loan [Member]
 West New York Parcel G Apartments Investors, L.L.C. [Member] | Sep. 30, 2013
 Construction Loan [Member]
 Riverwalk G Urban Renewal, L.L.C. [Member] | Sep. 30, 2013
 RiverTrace Project [Member]
 West New York Parcel G Apartments Investors, L.L.C. [Member] | |
| Schedule of Equity Method Investments [Line Items] | |||||||||||||
| Indirect residual ownership percentage | 25.00% | ||||||||||||
| Number of stories | 12 | ||||||||||||
| Number of units | 316 | ||||||||||||
| Percentage of interest in venture | 50.00% | ||||||||||||
| Investment ownership percentage | 50.00% | ||||||||||||
| Total project costs | $ 118,100,000 | $ 35,000,000 | |||||||||||
| Maximum borrowing capacity | 600,000,000 | 600,000,000 | 83,100,000 | 83,100,000 | |||||||||
| Percentage of operating return on capital | 7.75% | ||||||||||||
| Capital balance | 35,000,000 | ||||||||||||
| Accumulated unpaid operating return | 6,000,000 | ||||||||||||
| Percentage of capital event cash flows distributed | 100.00% | ||||||||||||
| Internal rate of return | 7.75% | ||||||||||||
| Amount of company's initial distributions to be redirected | 1,300,000 | ||||||||||||
| Amount outstanding | 54,600,000 | ||||||||||||
| Interest rate | 6.00% | ||||||||||||
| Loan maturity date | Jul. 01, 2021 | ||||||||||||
| Period of loan guarantee by company following completion of project | 6 months | ||||||||||||
| Development management and other services fees | $ 30,000 | $ 379,000 | |||||||||||
| Holding and distribution pattern under operating agreement | In general, the operating agreement of Riverwalk G provides that operating cash flows are distributed to members first to Investor and then to PruRose Riverwalk based on a 7.75 percent operating 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. | ||||||||||||