Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Overlook Ridge JV 2C/3B, L.L.C.) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (Overlook Ridge JV 2C/3B, L.L.C.) (Narrative) (Details) (USD $)
3 Months Ended 3 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2014
Overlook Ridge Apartments Investors, L.L.C. [Member]
Mar. 31, 2013
Overlook Ridge Apartments Investors, L.L.C. [Member]
Mar. 31, 2014
Overlook Ridge Apartments Member L.L.C. [Member]
Mar. 31, 2014
Rowe [Member]
Mar. 31, 2014
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Mar. 31, 2014
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Overlook Ridge Apartments Member L.L.C. [Member]
Mar. 31, 2014
Overlook Ridge 2C 3B's Interest In Overlook Ridge Apartments Investors [Member]
Mar. 31, 2014
Overlook 2C 3B Project [Member]
Mar. 31, 2014
Overlook 2C 3B Project [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Mar. 31, 2014
Overlook 2C 3B Project [Member]
Overlook Ridge JV 2C/3B, L.L.C. [Member]
item
property
Jan. 18, 2013
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Mar. 31, 2014
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
item
Mar. 31, 2014
Construction Loan [Member]
Overlook 2C 3B Project [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Mar. 31, 2014
Construction Loan Extension Number 1 [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Mar. 31, 2014
Minimum [Member]
Mar. 31, 2014
Minimum [Member]
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Mar. 31, 2014
Maximum [Member]
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                         55,500,000 55,500,000        
Amount outstanding                         30,000,000          
Percentage of operating return on capital   6.50%                                
Capital balance             23,900,000                      
Accumulated unpaid operating return             1,900,000                      
Percentage of capital event cash flows distributed       100.00%   30.00%                        
Initial internal rate of return       9.00%                            
Percentage of capital event cash flows distributed after initial internal rate of return reached       70.00%                            
Internal rate of return       11.00%                            
Spread over LIBOR                         2.50%          
Loan maturity date                         Dec. 01, 2015          
Number of extension options                         2          
Loan extension period                         1 year          
Extension fee                             0.25%      
Amount of debt guaranteed by company                         8,300,000          
Threshold of payment guarantee termination, debt service coverage ratio                                 1.25  
Interest rate                       3.0875%            
Notional amount                       1,840,000 50,800,000          
Percentage return on unrecovered capital           9.00%                        
Unrecovered notional capital 200,000       7,200,000                          
Development management and other services fees   $ 278,000 $ 69,000                              
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.       The operating agreement of Overlook 2C/3B provides, among other things, for the distribution of net operating cash flow to the members, as follows:First, to each member in proportion to and to the extent of such member's unrecovered return of nine percent on unrecovered capital; andSecond, to the members in accordance with their ownership percentages.