Annual report pursuant to Section 13 and 15(d)

Real Estate Investments - Noncontrolling Interests in Subsidiaries and VIEs (Details)

v2.4.0.8
Real Estate Investments - Noncontrolling Interests in Subsidiaries and VIEs (Details) (USD $)
12 Months Ended 6 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Aug. 31, 2007
4661 Kenmore Avenue [Member]
acre
Jun. 30, 2011
Six Fifty North Glebe Road [Member]
Dec. 31, 2013
Six Fifty North Glebe Road [Member]
Feb. 21, 2013
Six Fifty North Glebe Road [Member]
Dec. 31, 2012
Six Fifty North Glebe Road [Member]
Nov. 30, 2011
1225 First Street [Member]
Dec. 31, 2013
1225 First Street [Member]
Dec. 31, 2012
1225 First Street [Member]
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2013
Maximum [Member]
Real Estate Properties [Line Items]                          
Land, Acres Held       0.8                  
Gain on sale of properties $ 22,144,000 $ 5,124,000 $ 97,491,000                    
Estimated development costs         49,900,000       95,300,000        
Percentage of capital contribution through debt 70.00%               70.00%        
Ownership percentage         90.00%       95.00%     90.00% 95.00%
Percentage Of residential property to be leased to achieve project stabilization stage         90.00%                
Ownership percentage by noncontrolling owners         10.00%       5.00%        
Land and capitalized development costs           27,343,000   15,646,000   20,788,000 19,807,000    
Accounts payable and accrued liabilities 51,742,000 50,094,000       1,785,000   115,000   39,000 1,676,000    
Construction loan agreement             $ 33,000,000