| Investments In Unconsolidated Joint Ventures (RoseGarden Marbella South, L.L.C.) (Narrative) (Details) (USD $) | 0 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 9 Months Ended | 0 Months Ended | 0 Months Ended | 9 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul. 15, 2013 | Sep. 30, 2013
 item | Sep. 30, 2013
 PruRose Marbella II, L.L.C. [Member] | Sep. 30, 2013
 PruRose Marbella II, L.L.C. [Member] | Sep. 30, 2013
 RoseGarden Marbella South, L.L.C. [Member] | Oct. 23, 2012
 RoseGarden Marbella South, L.L.C. [Member]
 item | Sep. 30, 2013
 RoseGarden Marbella South, L.L.C. [Member]
 PruRose Marbella II, L.L.C. [Member] | Oct. 23, 2012
 RoseGarden Marbella South's Interest In PruRose Marbella II [Member] | Sep. 30, 2013
 Marbella II Project [Member] | Sep. 30, 2013
 Marbella II Project [Member]
 PRISA III Investments LLC [Member] | Sep. 30, 2013
 Marbella II Project [Member]
 Parent Company [Member] | Oct. 01, 2013
 Construction Loan [Member]
 PruRose Marbella II, L.L.C. [Member]
 item | Sep. 30, 2013
 Construction Loan [Member]
 Marbella II Project [Member]
 RoseGarden Marbella South, L.L.C. [Member] | Oct. 01, 2013
 Construction Loan Extension Number 1 [Member]
 PruRose Marbella II, L.L.C. [Member] | Sep. 30, 2013
 Construction Loan Extension Number 2 [Member]
 PruRose Marbella II, L.L.C. [Member] | |
| Schedule of Equity Method Investments [Line Items] | |||||||||||||||
| Indirect residual ownership percentage | 24.27% | ||||||||||||||
| Number of units | 311 | ||||||||||||||
| Percentage of interest in venture | 48.5325% | ||||||||||||||
| Investment ownership percentage | 50.00% | ||||||||||||||
| Total project costs | $ 132,100,000 | $ 41,400,000 | $ 13,300,000 | ||||||||||||
| Estimated project costs to be funded by member capital | 54,700,000 | ||||||||||||||
| Maximum borrowing capacity | 600,000,000 | 600,000,000 | 77,400,000 | 77,400,000 | |||||||||||
| Percentage of operating return on capital | 9.00% | ||||||||||||||
| Capital balance | 1,700,000 | 3,400,000 | |||||||||||||
| Accumulated unpaid operating return | 39,000 | 300,000 | |||||||||||||
| Spread over LIBOR | 1.25% | 2.25% | |||||||||||||
| Number of extension options | 2 | 2 | |||||||||||||
| Mortgage loan, maturity date | April 1, 2017 | ||||||||||||||
| Loan extension period | 1 year | ||||||||||||||
| Extension fee | 0.25% | 0.25% | |||||||||||||
| Development management and other services fees | $ 195,000 | $ 213,000 | |||||||||||||
| Holding and distribution pattern under operating agreement | In general, the operating agreement of PruRose/Marbella II provides that operating cash flows are distributed to members pro-rata based on a nine 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. | ||||||||||||||