Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.6
Investments In Unconsolidated Joint Ventures (Overlook Ridge JV 2C/3B, L.L.C.) (Narrative) (Details) (USD $)
2 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Overlook Ridge Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Overlook Ridge Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Overlook Ridge Apartments Member L.L.C. [Member]
Dec. 31, 2012
Rowe [Member]
Dec. 31, 2012
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Dec. 31, 2012
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Overlook Ridge Apartments Member L.L.C. [Member]
Dec. 31, 2012
Overlook Ridge 2C 3B's Interest In Overlook Ridge Apartments Investors [Member]
Dec. 31, 2012
Overlook 2C 3B Project [Member]
Dec. 31, 2012
Overlook 2C 3B Project [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Overlook 2C 3B Project [Member]
Overlook Ridge JV 2C/3B, L.L.C. [Member]
property
item
Dec. 31, 2012
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
item
Jan. 18, 2013
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Construction Loan [Member]
Overlook 2C 3B Project [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Construction Loan Extension Number 1 [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2012
Minimum [Member]
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Maximum [Member]
Jan. 18, 2013
Maximum [Member]
Construction Loan [Member]
Overlook Ridge Apartments Investors, L.L.C. [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 600,000,000                     55,500,000   55,500,000          
Percentage of operating return on capital     6.50%                                
Capital balance             17,600,000                        
Accumulated unpaid operating return             49,000                        
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    
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 200,000       7,200,000                            
Development management and other services fees   $ 403,000                                  
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.