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Schedule - III Real Estate Owned (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Real Estate and Accumulated Depreciation [Line Items]          
Deferred Finance Costs, Net         $ 0
Total Carrying Value $ 8,383,259 $ 8,207,977 $ 8,055,828 $ 9,190,276 8,383,259
Accumulated Depreciation 2,434,772 2,208,794 1,924,682 2,646,874 $ 2,434,772
Aggregate cost for federal income tax purposes       8,300,000  
Real Estate Owned, Gross [Roll Forward]          
Balance at beginning of the year 8,383,259 8,207,977 8,055,828    
Real estate acquired 906,446 231,225 0    
Capital expenditures and development 203,183 326,461 452,057    
Real estate sold (301,920) (269,681) (70,687)    
Hurricane related impairment of assets (692) (379) (2,355)    
Balance at end of the year 9,190,276 8,383,259 8,207,977    
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at beginning of the year 2,434,772 2,208,794 1,924,682    
Depreciation expense for the year 364,622 356,673 339,326    
Accumulated depreciation on sales (152,520) (126,151) (34,794)    
Accumulated depreciation on retirements of fully depreciated assets 0 0 (1,132)    
SEC Schedule III, Real Estate Accumulated Depreciation, Other Additions 0 0 1,374    
Write off of accumulated depreciation on hurricane related impaired assets 0 (316) 0    
Balance at end of year $ 2,646,874 2,434,772 2,208,794    
Estimated depreciable lives of buildings range beginning          
Real Estate and Accumulated Depreciation [Line Items]          
Depreciable life for all buildings 35 years        
Estimated depreciable lives of buildings range end          
Real Estate and Accumulated Depreciation [Line Items]          
Depreciable life for all buildings 55 years        
Total Operating Properties [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       1,370,739  
Initial Costs, Land and Land Improvements       1,697,251  
Initial Costs, Buildings and Improvements       4,850,356  
Total Initial Acquisition Costs       6,547,607  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,332,450  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,899,820  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       6,980,237  
Total Carrying Value $ 8,880,057     8,880,057  
Accumulated Depreciation 2,625,914     2,625,914  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 8,880,057        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,625,914        
Other          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances [1]       0  
Initial Costs, Land and Land Improvements [1]       0  
Initial Costs, Buildings and Improvements [1]       0  
Total Initial Acquisition Costs [1]       0  
Costs of Improvements Capitalized Subsequent to Acquisition Costs [1]       5,356  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements [1]       0  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements [1]       5,356  
Total Carrying Value [1] 5,356     5,356  
Accumulated Depreciation [1] 62     62  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year [1] 5,356        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year [1] 62        
1745 Shea [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances [1]       11,755  
Initial Costs, Land and Land Improvements [1]       3,034  
Initial Costs, Buildings and Improvements [1]       20,534  
Total Initial Acquisition Costs [1]       23,568  
Costs of Improvements Capitalized Subsequent to Acquisition Costs [1]       737  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements [1]       3,034  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements [1]       21,271  
Total Carrying Value [1] 24,305     24,305  
Accumulated Depreciation [1] 629     629  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year [1] 24,305        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year [1] 629        
TOTAL CORPORATE          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       11,755  
Initial Costs, Land and Land Improvements       3,034  
Initial Costs, Buildings and Improvements       20,534  
Total Initial Acquisition Costs       23,568  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,093  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,034  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       26,627  
Total Carrying Value 29,661     29,661  
Accumulated Depreciation 691     691  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 29,661        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 691        
Real Estate Under Development          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       78,085  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       78,085  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       45,987  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       78,085  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       45,987  
Total Carrying Value 124,072     124,072  
Accumulated Depreciation 0     0  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 124,072        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 0        
Real Estate Under Development | Pacific City [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       78,085  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       78,085  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       45,987  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       78,085  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       45,987  
Total Carrying Value 124,072     124,072  
Accumulated Depreciation 0     0  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 124,072        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 0        
Land          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       56,782  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       56,782  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       23,838  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       63,923  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       16,697  
Total Carrying Value 80,620     80,620  
Accumulated Depreciation 2,935     2,935  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 80,620        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,935        
Land | 2919 Wilshire          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,773  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       6,773  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,563  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,773  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       1,563  
Total Carrying Value 8,336     8,336  
Accumulated Depreciation 553     553  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 8,336        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 553        
Land | 7 Hardcourt          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       884  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       884  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       5,045  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       804  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       5,125  
Total Carrying Value 5,929     5,929  
Accumulated Depreciation 0     0  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 5,929        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 0        
Land | 345 Harrison Street [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       32,938  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       32,938  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,437  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       32,943  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       7,432  
Total Carrying Value 40,375     40,375  
Accumulated Depreciation 0     0  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 40,375        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 0        
Land | Waterside          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       11,862  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       11,862  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       283  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       12,084  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       61  
Total Carrying Value 12,145     12,145  
Accumulated Depreciation 284     284  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 12,145        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 284        
Land | Vitruvian          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,325  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       4,325  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,510  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       11,319  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,516  
Total Carrying Value 13,835     13,835  
Accumulated Depreciation 2,098     2,098  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 13,835        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,098        
Real Estate Held for Disposition [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       9,963  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       9,963  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,643  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       9,963  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,643  
Total Carrying Value 12,606     12,606  
Accumulated Depreciation 830     830  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 12,606        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 830        
Real Estate Held for Disposition [Member] | 3032 Wilshire          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       9,963  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       9,963  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,643  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       9,963  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,643  
Total Carrying Value 12,606     12,606  
Accumulated Depreciation 830     830  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 12,606        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 830        
Commercial Held for Development          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       32,351  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       32,351  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       30,909  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       40,197  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       23,063  
Total Carrying Value 63,260     63,260  
Accumulated Depreciation 16,504     16,504  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 63,260        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 16,504        
Commercial Held for Development | Hanover Village          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,624  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       1,624  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       0  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,104  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       520  
Total Carrying Value 1,624     1,624  
Accumulated Depreciation 553     553  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 1,624        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 553        
Commercial Held for Development | Circle Towers Office Bldg          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,407  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       1,407  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,021  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,380  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       6,048  
Total Carrying Value 7,428     7,428  
Accumulated Depreciation 2,683     2,683  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 7,428        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,683        
Commercial Held for Development | Brookhaven Shopping Center          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,943  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       4,943  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       16,785  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       7,793  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       13,935  
Total Carrying Value 21,728     21,728  
Accumulated Depreciation 12,496     12,496  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 21,728        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 12,496        
Commercial Held for Development | Bellevue Plaza retail          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       24,377  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       24,377  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       8,103  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       29,920  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,560  
Total Carrying Value 32,480     32,480  
Accumulated Depreciation 772     772  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 32,480        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 772        
Commercial Held for Development | TOTAL COMMERCIAL & CORPORATE          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       11,755  
Initial Costs, Land and Land Improvements       35,385  
Initial Costs, Buildings and Improvements       20,534  
Total Initial Acquisition Costs       55,919  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       37,002  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       43,231  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       49,690  
Total Carrying Value 92,921     92,921  
Accumulated Depreciation 17,195     17,195  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 92,921        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 17,195        
Commercial Held for Development | Total Real Estate Owned          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       1,376,945  
Initial Costs, Land and Land Improvements       1,877,466  
Initial Costs, Buildings and Improvements       4,870,890  
Total Initial Acquisition Costs       6,748,356  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,441,920  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,095,022  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       7,095,254  
Total Carrying Value 9,190,276     9,190,276  
Accumulated Depreciation 2,646,874     2,646,874  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 9,190,276        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,646,874        
Western Region          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       466,881  
Initial Costs, Land and Land Improvements       804,897  
Initial Costs, Buildings and Improvements       1,504,019  
Total Initial Acquisition Costs       2,308,916  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,019,059  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       883,471  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,444,504  
Total Carrying Value 3,327,975     3,327,975  
Accumulated Depreciation 1,037,095     1,037,095  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 3,327,975        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 1,037,095        
Western Region | Harbor at Mesa Verde          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       61,050  
Initial Costs, Land and Land Improvements       20,476  
Initial Costs, Buildings and Improvements       28,538  
Total Initial Acquisition Costs       49,014  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       14,641  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       21,314  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       42,341  
Total Carrying Value 63,655     63,655  
Accumulated Depreciation 27,697     27,697  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 63,655        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 27,697        
Western Region | 27 Seventy FIve Mesa Verde [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       36,423  
Initial Costs, Land and Land Improvements       99,329  
Initial Costs, Buildings and Improvements       110,644  
Total Initial Acquisition Costs       209,973  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       92,673  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       112,650  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       189,996  
Total Carrying Value 302,646     302,646  
Accumulated Depreciation 87,007     87,007  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 302,646        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 87,007        
Western Region | Pacific Shores          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       42,552  
Initial Costs, Land and Land Improvements       7,345  
Initial Costs, Buildings and Improvements       22,624  
Total Initial Acquisition Costs       29,969  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,913  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       7,913  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       31,969  
Total Carrying Value 39,882     39,882  
Accumulated Depreciation 20,771     20,771  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 39,882        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 20,771        
Western Region | Huntington Vista          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       36,980  
Initial Costs, Land and Land Improvements       8,055  
Initial Costs, Buildings and Improvements       22,486  
Total Initial Acquisition Costs       30,541  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       11,612  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       8,713  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       33,440  
Total Carrying Value 42,153     42,153  
Accumulated Depreciation 19,810     19,810  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 42,153        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 19,810        
Western Region | Missions at Back Bay          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       229  
Initial Costs, Buildings and Improvements       14,129  
Total Initial Acquisition Costs       14,358  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,526  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       10,874  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       6,010  
Total Carrying Value 16,884     16,884  
Accumulated Depreciation 4,229     4,229  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 16,884        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 4,229        
Western Region | Coronado at Newport — North          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       62,516  
Initial Costs, Buildings and Improvements       46,082  
Total Initial Acquisition Costs       108,598  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       29,014  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       66,770  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       70,842  
Total Carrying Value 137,612     137,612  
Accumulated Depreciation 44,814     44,814  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 137,612        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 44,814        
Western Region | Vista Del Rey          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       10,670  
Initial Costs, Buildings and Improvements       7,080  
Total Initial Acquisition Costs       17,750  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,502  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       10,988  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       9,264  
Total Carrying Value 20,252     20,252  
Accumulated Depreciation 6,117     6,117  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 20,252        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 6,117        
Western Region | Foxborough          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       12,071  
Initial Costs, Buildings and Improvements       6,187  
Total Initial Acquisition Costs       18,258  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,897  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       12,404  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       8,751  
Total Carrying Value 21,155     21,155  
Accumulated Depreciation 5,432     5,432  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 21,155        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 5,432        
Western Region | Coronado South          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       58,785  
Initial Costs, Buildings and Improvements       50,067  
Total Initial Acquisition Costs       108,852  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       19,393  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       59,278  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       68,967  
Total Carrying Value 128,245     128,245  
Accumulated Depreciation 43,476     43,476  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 128,245        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 43,476        
Western Region | 1818 Platinum Triangle          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       16,663  
Initial Costs, Buildings and Improvements       51,905  
Total Initial Acquisition Costs       68,568  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,488  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       16,822  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       53,234  
Total Carrying Value 70,056     70,056  
Accumulated Depreciation 16,975     16,975  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 70,056        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 16,975        
Western Region | Beach & Ocean [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       12,878  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       12,878  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       38,710  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       13,007  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       38,581  
Total Carrying Value 51,588     51,588  
Accumulated Depreciation 2,841     2,841  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 51,588        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,841        
Western Region | ORANGE COUNTY, CA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       177,005  
Initial Costs, Land and Land Improvements       351,315  
Initial Costs, Buildings and Improvements       359,742  
Total Initial Acquisition Costs       711,057  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       421,532  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       382,189  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       750,400  
Total Carrying Value 1,132,589     1,132,589  
Accumulated Depreciation 307,438     307,438  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 1,132,589        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 307,438        
Western Region | 2000 Post Street          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       9,861  
Initial Costs, Buildings and Improvements       44,578  
Total Initial Acquisition Costs       54,439  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       30,040  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       13,541  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       70,938  
Total Carrying Value 84,479     84,479  
Accumulated Depreciation 31,789     31,789  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 84,479        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 31,789        
Western Region | Birch Creek          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,365  
Initial Costs, Buildings and Improvements       16,696  
Total Initial Acquisition Costs       21,061  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,536  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,139  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       23,458  
Total Carrying Value 28,597     28,597  
Accumulated Depreciation 13,756     13,756  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 28,597        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 13,756        
Western Region | Highlands Of Marin          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       5,996  
Initial Costs, Buildings and Improvements       24,868  
Total Initial Acquisition Costs       30,864  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       26,063  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       7,257  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       49,670  
Total Carrying Value 56,927     56,927  
Accumulated Depreciation 29,237     29,237  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 56,927        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 29,237        
Western Region | Marina Playa          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,224  
Initial Costs, Buildings and Improvements       23,916  
Total Initial Acquisition Costs       30,140  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       10,032  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,938  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       33,234  
Total Carrying Value 40,172     40,172  
Accumulated Depreciation 19,547     19,547  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 40,172        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 19,547        
Western Region | River Terrace          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       39,310  
Initial Costs, Land and Land Improvements       22,161  
Initial Costs, Buildings and Improvements       40,137  
Total Initial Acquisition Costs       62,298  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,307  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       22,428  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       44,177  
Total Carrying Value 66,605     66,605  
Accumulated Depreciation 25,943     25,943  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 66,605        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 25,943        
Western Region | CitySouth          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       14,031  
Initial Costs, Buildings and Improvements       30,537  
Total Initial Acquisition Costs       44,568  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       35,627  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       16,290  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       63,905  
Total Carrying Value 80,195     80,195  
Accumulated Depreciation 36,437     36,437  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 80,195        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 36,437        
Western Region | Bay Terrace          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       8,545  
Initial Costs, Buildings and Improvements       14,458  
Total Initial Acquisition Costs       23,003  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       5,046  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       11,458  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       16,591  
Total Carrying Value 28,049     28,049  
Accumulated Depreciation 9,622     9,622  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 28,049        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 9,622        
Western Region | Highlands of Marin Phase II          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       5,353  
Initial Costs, Buildings and Improvements       18,559  
Total Initial Acquisition Costs       23,912  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       11,088  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,758  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       29,242  
Total Carrying Value 35,000     35,000  
Accumulated Depreciation 15,221     15,221  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 35,000        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 15,221        
Western Region | Edgewater          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       30,657  
Initial Costs, Buildings and Improvements       83,872  
Total Initial Acquisition Costs       114,529  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       3,689  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       30,690  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       87,528  
Total Carrying Value 118,218     118,218  
Accumulated Depreciation 39,217     39,217  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 118,218        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 39,217        
Western Region | Almaden Lake Village          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       27,000  
Initial Costs, Land and Land Improvements       594  
Initial Costs, Buildings and Improvements       42,515  
Total Initial Acquisition Costs       43,109  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,031  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       773  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       48,367  
Total Carrying Value 49,140     49,140  
Accumulated Depreciation 21,469     21,469  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 49,140        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 21,469        
Western Region | 388 Beale          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       14,253  
Initial Costs, Buildings and Improvements       74,104  
Total Initial Acquisition Costs       88,357  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,271  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       14,316  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       80,312  
Total Carrying Value 94,628     94,628  
Accumulated Depreciation 21,255     21,255  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 94,628        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 21,255        
Western Region | Channel @ Mission Bay [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       23,625  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       23,625  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       128,433  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       23,662  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       128,396  
Total Carrying Value 152,058     152,058  
Accumulated Depreciation 15,675     15,675  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 152,058        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 15,675        
Western Region | SAN FRANCISCO, CA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       66,310  
Initial Costs, Land and Land Improvements       145,665  
Initial Costs, Buildings and Improvements       414,240  
Total Initial Acquisition Costs       559,905  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       274,163  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       158,250  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       675,818  
Total Carrying Value 834,068     834,068  
Accumulated Depreciation 279,168     279,168  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 834,068        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 279,168        
Western Region | Rosebeach          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       8,414  
Initial Costs, Buildings and Improvements       17,449  
Total Initial Acquisition Costs       25,863  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       3,450  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       8,760  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       20,553  
Total Carrying Value 29,313     29,313  
Accumulated Depreciation 12,675     12,675  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 29,313        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 12,675        
Western Region | Tierra Del Rey          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       43,078  
Initial Costs, Land and Land Improvements       39,586  
Initial Costs, Buildings and Improvements       36,679  
Total Initial Acquisition Costs       76,265  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       3,250  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       39,674  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       39,841  
Total Carrying Value 79,515     79,515  
Accumulated Depreciation 18,883     18,883  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 79,515        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 18,883        
Western Region | The Westerly          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       67,700  
Initial Costs, Land and Land Improvements       48,182  
Initial Costs, Buildings and Improvements       102,364  
Total Initial Acquisition Costs       150,546  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       37,220  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       50,722  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       137,044  
Total Carrying Value 187,766     187,766  
Accumulated Depreciation 46,474     46,474  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 187,766        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 46,474        
Western Region | Jefferson at Marina del Rey          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       55,651  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       55,651  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       90,660  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       61,455  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       84,856  
Total Carrying Value 146,311     146,311  
Accumulated Depreciation 32,288     32,288  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 146,311        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 32,288        
Western Region | LOS ANGELES, CA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       110,778  
Initial Costs, Land and Land Improvements       151,833  
Initial Costs, Buildings and Improvements       156,492  
Total Initial Acquisition Costs       308,325  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       134,580  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       160,611  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       282,294  
Total Carrying Value 442,905     442,905  
Accumulated Depreciation 110,320     110,320  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 442,905        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 110,320        
Western Region | Crowne Pointe          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,486  
Initial Costs, Buildings and Improvements       6,437  
Total Initial Acquisition Costs       8,923  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       5,666  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,868  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       11,721  
Total Carrying Value 14,589     14,589  
Accumulated Depreciation 7,585     7,585  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 14,589        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 7,585        
Western Region | Hilltop          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,174  
Initial Costs, Buildings and Improvements       7,408  
Total Initial Acquisition Costs       9,582  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,328  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,724  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       11,186  
Total Carrying Value 13,910     13,910  
Accumulated Depreciation 6,895     6,895  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 13,910        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 6,895        
Western Region | The Hawthorne          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       34,934  
Initial Costs, Land and Land Improvements       6,474  
Initial Costs, Buildings and Improvements       30,226  
Total Initial Acquisition Costs       36,700  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,621  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,644  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       34,677  
Total Carrying Value 41,321     41,321  
Accumulated Depreciation 20,306     20,306  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 41,321        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 20,306        
Western Region | The Kennedy          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,179  
Initial Costs, Buildings and Improvements       22,307  
Total Initial Acquisition Costs       28,486  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,931  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,272  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       24,145  
Total Carrying Value 30,417     30,417  
Accumulated Depreciation 13,947     13,947  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 30,417        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 13,947        
Western Region | Hearthstone at Merrill Creek          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       22,591  
Initial Costs, Land and Land Improvements       6,848  
Initial Costs, Buildings and Improvements       30,922  
Total Initial Acquisition Costs       37,770  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       3,829  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,975  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       34,624  
Total Carrying Value 41,599     41,599  
Accumulated Depreciation 15,574     15,574  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 41,599        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 15,574        
Western Region | Island Square          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       21,284  
Initial Costs, Buildings and Improvements       89,389  
Total Initial Acquisition Costs       110,673  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,695  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       21,428  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       93,940  
Total Carrying Value 115,368     115,368  
Accumulated Depreciation 40,021     40,021  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 115,368        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 40,021        
Western Region | Borgata          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,379  
Initial Costs, Buildings and Improvements       34,569  
Total Initial Acquisition Costs       40,948  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       (7,991)  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,404  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       26,553  
Total Carrying Value 32,957     32,957  
Accumulated Depreciation 12,502     12,502  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 32,957        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 12,502        
Western Region | elements too          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       27,468  
Initial Costs, Buildings and Improvements       72,036  
Total Initial Acquisition Costs       99,504  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       15,676  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       30,244  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       84,936  
Total Carrying Value 115,180     115,180  
Accumulated Depreciation 39,911     39,911  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 115,180        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 39,911        
Western Region | 989elements          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       8,541  
Initial Costs, Buildings and Improvements       45,990  
Total Initial Acquisition Costs       54,531  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,968  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       8,578  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       47,921  
Total Carrying Value 56,499     56,499  
Accumulated Depreciation 16,491     16,491  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 56,499        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 16,491        
Western Region | Lightbox [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,449  
Initial Costs, Buildings and Improvements       38,884  
Total Initial Acquisition Costs       45,333  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       422  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,449  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       39,306  
Total Carrying Value 45,755     45,755  
Accumulated Depreciation 3,374     3,374  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 45,755        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 3,374        
Western Region | Waterscape [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       9,693  
Initial Costs, Buildings and Improvements       65,176  
Total Initial Acquisition Costs       74,869  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       613  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       9,694  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       65,788  
Total Carrying Value 75,482     75,482  
Accumulated Depreciation 4,924     4,924  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 75,482        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 4,924        
Western Region | SEATTLE, WA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       57,525  
Initial Costs, Land and Land Improvements       103,975  
Initial Costs, Buildings and Improvements       443,344  
Total Initial Acquisition Costs       547,319  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       35,758  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       108,280  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       474,797  
Total Carrying Value 583,077     583,077  
Accumulated Depreciation 181,530     181,530  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 583,077        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 181,530        
Western Region | Villas at Carlsbad          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,517  
Initial Costs, Buildings and Improvements       10,718  
Total Initial Acquisition Costs       17,235  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,876  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,780  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       13,331  
Total Carrying Value 20,111     20,111  
Accumulated Depreciation 7,826     7,826  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 20,111        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 7,826        
Western Region | Boronda Manor          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,946  
Initial Costs, Buildings and Improvements       8,982  
Total Initial Acquisition Costs       10,928  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,534  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,195  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       17,267  
Total Carrying Value 20,462     20,462  
Accumulated Depreciation 9,244     9,244  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 20,462        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 9,244        
Western Region | Garden Court          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       888  
Initial Costs, Buildings and Improvements       4,188  
Total Initial Acquisition Costs       5,076  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       5,435  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,559  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       8,952  
Total Carrying Value 10,511     10,511  
Accumulated Depreciation 4,981     4,981  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 10,511        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 4,981        
Western Region | Cambridge Court          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       3,039  
Initial Costs, Buildings and Improvements       12,883  
Total Initial Acquisition Costs       15,922  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       14,767  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,302  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       25,387  
Total Carrying Value 30,689     30,689  
Accumulated Depreciation 13,958     13,958  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 30,689        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 13,958        
Western Region | Laurel Tree          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,304  
Initial Costs, Buildings and Improvements       5,115  
Total Initial Acquisition Costs       6,419  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,080  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,188  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       10,311  
Total Carrying Value 12,499     12,499  
Accumulated Depreciation 5,627     5,627  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 12,499        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 5,627        
Western Region | The Pointe At Harden Ranch          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,388  
Initial Costs, Buildings and Improvements       23,854  
Total Initial Acquisition Costs       30,242  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       27,357  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       10,021  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       47,578  
Total Carrying Value 57,599     57,599  
Accumulated Depreciation 24,926     24,926  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 57,599        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 24,926        
Western Region | The Pointe At Northridge          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,044  
Initial Costs, Buildings and Improvements       8,028  
Total Initial Acquisition Costs       10,072  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       10,089  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,295  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       16,866  
Total Carrying Value 20,161     20,161  
Accumulated Depreciation 9,293     9,293  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 20,161        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 9,293        
Western Region | The Pointe At Westlake          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,329  
Initial Costs, Buildings and Improvements       5,334  
Total Initial Acquisition Costs       6,663  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,364  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,181  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       10,846  
Total Carrying Value 13,027     13,027  
Accumulated Depreciation 5,700     5,700  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 13,027        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 5,700        
Western Region | MONTEREY PENINSULA, CA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       16,938  
Initial Costs, Buildings and Improvements       68,384  
Total Initial Acquisition Costs       85,322  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       79,626  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       27,741  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       137,207  
Total Carrying Value 164,948     164,948  
Accumulated Depreciation 73,729     73,729  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 164,948        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 73,729        
Western Region | Verano at Rancho Cucamonga Town Square          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       55,263  
Initial Costs, Land and Land Improvements       13,557  
Initial Costs, Buildings and Improvements       3,645  
Total Initial Acquisition Costs       17,202  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       53,949  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       23,255  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       47,896  
Total Carrying Value 71,151     71,151  
Accumulated Depreciation 34,875     34,875  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 71,151        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 34,875        
Western Region | Windemere at Sycamore Highland          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       5,810  
Initial Costs, Buildings and Improvements       23,450  
Total Initial Acquisition Costs       29,260  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,964  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,129  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       26,095  
Total Carrying Value 32,224     32,224  
Accumulated Depreciation 17,614     17,614  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 32,224        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 17,614        
Western Region | Other Southern CA [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       55,263  
Initial Costs, Land and Land Improvements       25,884  
Initial Costs, Buildings and Improvements       37,813  
Total Initial Acquisition Costs       63,697  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       59,789  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       36,164  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       87,322  
Total Carrying Value 123,486     123,486  
Accumulated Depreciation 60,315     60,315  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 123,486        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 60,315        
Western Region | Tualatin Heights          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       3,273  
Initial Costs, Buildings and Improvements       9,134  
Total Initial Acquisition Costs       12,407  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,745  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,841  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       15,311  
Total Carrying Value 19,152     19,152  
Accumulated Depreciation 10,231     10,231  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 19,152        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 10,231        
Western Region | Hunt Club          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,014  
Initial Costs, Buildings and Improvements       14,870  
Total Initial Acquisition Costs       20,884  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,866  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,395  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       21,355  
Total Carrying Value 27,750     27,750  
Accumulated Depreciation 14,364     14,364  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 27,750        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 14,364        
Western Region | PORTLAND, OR          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       9,287  
Initial Costs, Buildings and Improvements       24,004  
Total Initial Acquisition Costs       33,291  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       13,611  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       10,236  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       36,666  
Total Carrying Value 46,902     46,902  
Accumulated Depreciation 24,595     24,595  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 46,902        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 24,595        
Western Region | The Residences at Bella Terra          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       25,000  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       25,000  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       125,818  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       25,058  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       125,760  
Total Carrying Value 150,818     150,818  
Accumulated Depreciation 19,253     19,253  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 150,818        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 19,253        
Western Region | Los Alisos [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       17,298  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       17,298  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       70,345  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       16,398  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       71,245  
Total Carrying Value 87,643     87,643  
Accumulated Depreciation 9,016     9,016  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 87,643        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 9,016        
Mid Atlantic Region          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       507,412  
Initial Costs, Land and Land Improvements       388,304  
Initial Costs, Buildings and Improvements       1,550,755  
Total Initial Acquisition Costs       1,939,059  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       598,125  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       464,660  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,072,524  
Total Carrying Value 2,537,184     2,537,184  
Accumulated Depreciation 647,723     647,723  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 2,537,184        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 647,723        
Mid Atlantic Region | Dominion Middle Ridge          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       29,344  
Initial Costs, Land and Land Improvements       3,311  
Initial Costs, Buildings and Improvements       13,283  
Total Initial Acquisition Costs       16,594  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,816  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,850  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       19,560  
Total Carrying Value 23,410     23,410  
Accumulated Depreciation 14,076     14,076  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 23,410        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 14,076        
Mid Atlantic Region | Dominion Lake Ridge          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       20,047  
Initial Costs, Land and Land Improvements       2,366  
Initial Costs, Buildings and Improvements       8,387  
Total Initial Acquisition Costs       10,753  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,490  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,866  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       15,377  
Total Carrying Value 18,243     18,243  
Accumulated Depreciation 10,431     10,431  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 18,243        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 10,431        
Mid Atlantic Region | Presidential Greens          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       11,238  
Initial Costs, Buildings and Improvements       18,790  
Total Initial Acquisition Costs       30,028  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,883  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       11,680  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       28,231  
Total Carrying Value 39,911     39,911  
Accumulated Depreciation 19,977     19,977  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 39,911        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 19,977        
Mid Atlantic Region | The Whitmore          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,418  
Initial Costs, Buildings and Improvements       13,411  
Total Initial Acquisition Costs       19,829  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       20,734  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       7,495  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       33,068  
Total Carrying Value 40,563     40,563  
Accumulated Depreciation 22,988     22,988  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 40,563        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 22,988        
Mid Atlantic Region | Ridgewood          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       5,612  
Initial Costs, Buildings and Improvements       20,086  
Total Initial Acquisition Costs       25,698  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       8,522  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,014  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       28,206  
Total Carrying Value 34,220     34,220  
Accumulated Depreciation 20,340     20,340  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 34,220        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 20,340        
Mid Atlantic Region | Waterside Towers          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,139  
Initial Costs, Buildings and Improvements       49,657  
Total Initial Acquisition Costs       50,796  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       18,261  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       36,233  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       32,824  
Total Carrying Value 69,057     69,057  
Accumulated Depreciation 20,975     20,975  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 69,057        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 20,975        
Mid Atlantic Region | Wellington Place at Olde Town          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       32,037  
Initial Costs, Land and Land Improvements       13,753  
Initial Costs, Buildings and Improvements       36,059  
Total Initial Acquisition Costs       49,812  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       17,416  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       14,740  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       52,488  
Total Carrying Value 67,228     67,228  
Accumulated Depreciation 35,000     35,000  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 67,228        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 35,000        
Mid Atlantic Region | Andover House          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       14,357  
Initial Costs, Buildings and Improvements       51,577  
Total Initial Acquisition Costs       65,934  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       3,769  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       14,379  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       55,324  
Total Carrying Value 69,703     69,703  
Accumulated Depreciation 27,837     27,837  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 69,703        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 27,837        
Mid Atlantic Region | Sullivan Place          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,137  
Initial Costs, Buildings and Improvements       103,676  
Total Initial Acquisition Costs       104,813  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,066  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,364  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       110,515  
Total Carrying Value 111,879     111,879  
Accumulated Depreciation 51,643     51,643  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 111,879        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 51,643        
Mid Atlantic Region | Circle Towers          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       70,884  
Initial Costs, Land and Land Improvements       32,815  
Initial Costs, Buildings and Improvements       107,051  
Total Initial Acquisition Costs       139,866  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       13,056  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       33,357  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       119,565  
Total Carrying Value 152,922     152,922  
Accumulated Depreciation 53,022     53,022  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 152,922        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 53,022        
Mid Atlantic Region | Delancey at Shirlington          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       21,606  
Initial Costs, Buildings and Improvements       66,765  
Total Initial Acquisition Costs       88,371  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,195  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       21,632  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       68,934  
Total Carrying Value 90,566     90,566  
Accumulated Depreciation 30,609     30,609  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 90,566        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 30,609        
Mid Atlantic Region | View 14          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       5,710  
Initial Costs, Buildings and Improvements       97,941  
Total Initial Acquisition Costs       103,651  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,888  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,721  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       100,818  
Total Carrying Value 106,539     106,539  
Accumulated Depreciation 25,845     25,845  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 106,539        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 25,845        
Mid Atlantic Region | Signal Hill          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       13,290  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       13,290  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       69,769  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       25,510  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       57,549  
Total Carrying Value 83,059     83,059  
Accumulated Depreciation 25,243     25,243  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 83,059        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 25,243        
Mid Atlantic Region | METROPOLITAN DC          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       407,067  
Initial Costs, Land and Land Improvements       345,666  
Initial Costs, Buildings and Improvements       1,307,924  
Total Initial Acquisition Costs       1,653,590  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       454,931  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       406,934  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       1,701,587  
Total Carrying Value 2,108,521     2,108,521  
Accumulated Depreciation 403,882     403,882  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 2,108,521        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 403,882        
Mid Atlantic Region | Dominion Kings Place          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       14,294  
Initial Costs, Land and Land Improvements       1,565  
Initial Costs, Buildings and Improvements       7,007  
Total Initial Acquisition Costs       8,572  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,484  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,890  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       11,166  
Total Carrying Value 13,056     13,056  
Accumulated Depreciation 8,506     8,506  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 13,056        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 8,506        
Mid Atlantic Region | Dominion At Eden Brook          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,361  
Initial Costs, Buildings and Improvements       9,384  
Total Initial Acquisition Costs       11,745  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,787  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,977  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       15,555  
Total Carrying Value 18,532     18,532  
Accumulated Depreciation 12,406     12,406  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 18,532        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 12,406        
Mid Atlantic Region | Ellicott Grove          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,920  
Initial Costs, Buildings and Improvements       9,099  
Total Initial Acquisition Costs       12,019  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       23,363  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,379  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       30,003  
Total Carrying Value 35,382     35,382  
Accumulated Depreciation 23,332     23,332  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 35,382        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 23,332        
Mid Atlantic Region | Dominion Constant Friendship          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       8,783  
Initial Costs, Land and Land Improvements       903  
Initial Costs, Buildings and Improvements       4,669  
Total Initial Acquisition Costs       5,572  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,117  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,320  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       8,369  
Total Carrying Value 9,689     9,689  
Accumulated Depreciation 6,274     6,274  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 9,689        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 6,274        
Mid Atlantic Region | Lakeside Mill          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       12,569  
Initial Costs, Land and Land Improvements       2,666  
Initial Costs, Buildings and Improvements       10,109  
Total Initial Acquisition Costs       12,775  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       5,038  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,997  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       14,816  
Total Carrying Value 17,813     17,813  
Accumulated Depreciation 11,336     11,336  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 17,813        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 11,336        
Mid Atlantic Region | Calvert’s Walk          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,408  
Initial Costs, Buildings and Improvements       24,692  
Total Initial Acquisition Costs       29,100  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,396  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,817  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       31,679  
Total Carrying Value 36,496     36,496  
Accumulated Depreciation 20,827     20,827  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 36,496        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 20,827        
Mid Atlantic Region | Arborview Apartments          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,653  
Initial Costs, Buildings and Improvements       23,952  
Total Initial Acquisition Costs       28,605  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       8,090  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,249  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       31,446  
Total Carrying Value 36,695     36,695  
Accumulated Depreciation 21,388     21,388  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 36,695        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 21,388        
Mid Atlantic Region | Liriope Apartments          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,620  
Initial Costs, Buildings and Improvements       6,791  
Total Initial Acquisition Costs       8,411  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,374  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,653  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       8,132  
Total Carrying Value 9,785     9,785  
Accumulated Depreciation 5,352     5,352  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 9,785        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 5,352        
Mid Atlantic Region | 20 Lambourne          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       30,132  
Initial Costs, Land and Land Improvements       11,750  
Initial Costs, Buildings and Improvements       45,590  
Total Initial Acquisition Costs       57,340  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,406  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       12,106  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       51,640  
Total Carrying Value 63,746     63,746  
Accumulated Depreciation 24,313     24,313  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 63,746        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 24,313        
Mid Atlantic Region | Domain Brewers Hill          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,669  
Initial Costs, Buildings and Improvements       40,630  
Total Initial Acquisition Costs       45,299  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       942  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,700  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       41,541  
Total Carrying Value 46,241     46,241  
Accumulated Depreciation 12,690     12,690  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 46,241        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 12,690        
Mid Atlantic Region | BALTIMORE, MD          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       65,778  
Initial Costs, Land and Land Improvements       37,515  
Initial Costs, Buildings and Improvements       181,923  
Total Initial Acquisition Costs       219,438  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       67,997  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       43,088  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       244,347  
Total Carrying Value 287,435     287,435  
Accumulated Depreciation 146,424     146,424  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 287,435        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 146,424        
Mid Atlantic Region | Gayton Pointe Townhomes          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       826  
Initial Costs, Buildings and Improvements       5,148  
Total Initial Acquisition Costs       5,974  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       29,738  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,463  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       32,249  
Total Carrying Value 35,712     35,712  
Accumulated Depreciation 27,255     27,255  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 35,712        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 27,255        
Mid Atlantic Region | Waterside At Ironbridge          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,844  
Initial Costs, Buildings and Improvements       13,239  
Total Initial Acquisition Costs       15,083  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,614  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,328  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       20,369  
Total Carrying Value 22,697     22,697  
Accumulated Depreciation 13,860     13,860  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 22,697        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 13,860        
Mid Atlantic Region | Carriage Homes at Wyndham          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       474  
Initial Costs, Buildings and Improvements       30,997  
Total Initial Acquisition Costs       31,471  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,959  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,901  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       35,529  
Total Carrying Value 39,430     39,430  
Accumulated Depreciation 24,260     24,260  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 39,430        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 24,260        
Mid Atlantic Region | Legacy at Mayland          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       34,567  
Initial Costs, Land and Land Improvements       1,979  
Initial Costs, Buildings and Improvements       11,524  
Total Initial Acquisition Costs       13,503  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       29,886  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,946  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       38,443  
Total Carrying Value 43,389     43,389  
Accumulated Depreciation 32,042     32,042  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 43,389        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 32,042        
Mid Atlantic Region | RICHMOND, VA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       34,567  
Initial Costs, Land and Land Improvements       5,123  
Initial Costs, Buildings and Improvements       60,908  
Total Initial Acquisition Costs       66,031  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       75,197  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       14,638  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       126,590  
Total Carrying Value 141,228     141,228  
Accumulated Depreciation 97,417     97,417  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 141,228        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 97,417        
Mid Atlantic Region | DelRey Tower [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       297  
Initial Costs, Buildings and Improvements       12,786  
Total Initial Acquisition Costs       13,083  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       113,357  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       9,461  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       116,979  
Total Carrying Value 126,440     126,440  
Accumulated Depreciation 9,914     9,914  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 126,440        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 9,914        
Mid Atlantic Region | Capitol View on 14th          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       31,393  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       31,393  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       94,714  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       31,395  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       94,712  
Total Carrying Value 126,107     126,107  
Accumulated Depreciation 17,603     17,603  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 126,107        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 17,603        
Mid Atlantic Region | Domain College Park [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       31,337  
Initial Costs, Land and Land Improvements       7,300  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       7,300  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       58,032  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       7,307  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       58,025  
Total Carrying Value 65,332     65,332  
Accumulated Depreciation 8,008     8,008  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 65,332        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 8,008        
Mid Atlantic Region | 1200 East West [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       9,748  
Initial Costs, Buildings and Improvements       68,022  
Total Initial Acquisition Costs       77,770  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       85  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       9,749  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       68,106  
Total Carrying Value 77,855     77,855  
Accumulated Depreciation 878     878  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 77,855        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 878        
Mid Atlantic Region | Courts at Huntington Station [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       27,749  
Initial Costs, Buildings and Improvements       111,878  
Total Initial Acquisition Costs       139,627  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       78  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       27,749  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       111,956  
Total Carrying Value 139,705     139,705  
Accumulated Depreciation 1,682     1,682  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 139,705        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 1,682        
Mid Atlantic Region | Eleven55 Ripley [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       15,566  
Initial Costs, Buildings and Improvements       107,539  
Total Initial Acquisition Costs       123,105  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       76  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       15,566  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       107,615  
Total Carrying Value 123,181     123,181  
Accumulated Depreciation 1,402     1,402  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 123,181        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 1,402        
Mid Atlantic Region | Arbor Park of Alexandria [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       95,818  
Initial Costs, Land and Land Improvements       50,881  
Initial Costs, Buildings and Improvements       159,728  
Total Initial Acquisition Costs       210,609  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       99  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       50,881  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       159,827  
Total Carrying Value 210,708     210,708  
Accumulated Depreciation 2,428     2,428  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 210,708        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,428        
Mid Atlantic Region | Courts at Dulles [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       14,697  
Initial Costs, Buildings and Improvements       83,834  
Total Initial Acquisition Costs       98,531  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       150  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       14,700  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       83,981  
Total Carrying Value 98,681     98,681  
Accumulated Depreciation 1,277     1,277  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 98,681        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 1,277        
Mid Atlantic Region | Newport Village [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       127,600  
Initial Costs, Land and Land Improvements       55,283  
Initial Costs, Buildings and Improvements       177,454  
Total Initial Acquisition Costs       232,737  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       475  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       55,285  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       177,927  
Total Carrying Value 233,212     233,212  
Accumulated Depreciation 2,704     2,704  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 233,212        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,704        
Southeastern Region          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       170,986  
Initial Costs, Land and Land Improvements       86,349  
Initial Costs, Buildings and Improvements       355,426  
Total Initial Acquisition Costs       441,775  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       288,284  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       118,304  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       611,755  
Total Carrying Value 730,059     730,059  
Accumulated Depreciation 425,591     425,591  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 730,059        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 425,591        
Southeastern Region | Summit West          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,176  
Initial Costs, Buildings and Improvements       4,710  
Total Initial Acquisition Costs       6,886  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,314  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,552  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       12,648  
Total Carrying Value 16,200     16,200  
Accumulated Depreciation 11,005     11,005  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 16,200        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 11,005        
Southeastern Region | The Breyley          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,780  
Initial Costs, Buildings and Improvements       2,458  
Total Initial Acquisition Costs       4,238  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       17,606  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,457  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       18,387  
Total Carrying Value 21,844     21,844  
Accumulated Depreciation 16,978     16,978  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 21,844        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 16,978        
Southeastern Region | Lakewood Place          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       18,230  
Initial Costs, Land and Land Improvements       1,395  
Initial Costs, Buildings and Improvements       10,647  
Total Initial Acquisition Costs       12,042  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,654  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,709  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       18,987  
Total Carrying Value 21,696     21,696  
Accumulated Depreciation 14,531     14,531  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 21,696        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 14,531        
Southeastern Region | Cambridge Woods          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       12,713  
Initial Costs, Land and Land Improvements       1,791  
Initial Costs, Buildings and Improvements       7,166  
Total Initial Acquisition Costs       8,957  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,042  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,687  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       15,312  
Total Carrying Value 17,999     17,999  
Accumulated Depreciation 11,297     11,297  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 17,999        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 11,297        
Southeastern Region | Inlet Bay          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       7,702  
Initial Costs, Buildings and Improvements       23,150  
Total Initial Acquisition Costs       30,852  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       15,659  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       9,304  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       37,207  
Total Carrying Value 46,511     46,511  
Accumulated Depreciation 27,055     27,055  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 46,511        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 27,055        
Southeastern Region | MacAlpine Place          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       10,869  
Initial Costs, Buildings and Improvements       36,858  
Total Initial Acquisition Costs       47,727  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,862  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       11,545  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       44,044  
Total Carrying Value 55,589     55,589  
Accumulated Depreciation 28,780     28,780  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 55,589        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 28,780        
Southeastern Region | The Vintage Lofts at West End          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,611  
Initial Costs, Buildings and Improvements       37,663  
Total Initial Acquisition Costs       44,274  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       16,107  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       15,119  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       45,262  
Total Carrying Value 60,381     60,381  
Accumulated Depreciation 22,082     22,082  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 60,381        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 22,082        
Southeastern Region | TAMPA, FL          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       30,943  
Initial Costs, Land and Land Improvements       32,324  
Initial Costs, Buildings and Improvements       122,652  
Total Initial Acquisition Costs       154,976  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       85,244  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       48,373  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       191,847  
Total Carrying Value 240,220     240,220  
Accumulated Depreciation 131,728     131,728  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 240,220        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 131,728        
Southeastern Region | Seabrook          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,846  
Initial Costs, Buildings and Improvements       4,155  
Total Initial Acquisition Costs       6,001  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       8,427  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,763  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       11,665  
Total Carrying Value 14,428     14,428  
Accumulated Depreciation 9,531     9,531  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 14,428        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 9,531        
Southeastern Region | Altamira Place          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,533  
Initial Costs, Buildings and Improvements       11,076  
Total Initial Acquisition Costs       12,609  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       20,724  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,539  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       29,794  
Total Carrying Value 33,333     33,333  
Accumulated Depreciation 25,586     25,586  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 33,333        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 25,586        
Southeastern Region | Regatta Shore          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       757  
Initial Costs, Buildings and Improvements       6,608  
Total Initial Acquisition Costs       7,365  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       16,031  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,060  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       21,336  
Total Carrying Value 23,396     23,396  
Accumulated Depreciation 17,330     17,330  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 23,396        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 17,330        
Southeastern Region | Alafaya Woods          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       17,776  
Initial Costs, Land and Land Improvements       1,653  
Initial Costs, Buildings and Improvements       9,042  
Total Initial Acquisition Costs       10,695  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,245  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,555  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       17,385  
Total Carrying Value 19,940     19,940  
Accumulated Depreciation 13,299     13,299  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 19,940        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 13,299        
Southeastern Region | Los Altos          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       21,592  
Initial Costs, Land and Land Improvements       2,804  
Initial Costs, Buildings and Improvements       12,349  
Total Initial Acquisition Costs       15,153  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       10,994  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,058  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       22,089  
Total Carrying Value 26,147     26,147  
Accumulated Depreciation 15,263     15,263  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 26,147        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 15,263        
Southeastern Region | Lotus Landing          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,185  
Initial Costs, Buildings and Improvements       8,639  
Total Initial Acquisition Costs       10,824  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       10,108  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,873  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       18,059  
Total Carrying Value 20,932     20,932  
Accumulated Depreciation 11,987     11,987  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 20,932        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 11,987        
Southeastern Region | Seville On The Green          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,282  
Initial Costs, Buildings and Improvements       6,498  
Total Initial Acquisition Costs       7,780  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,249  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,738  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       13,291  
Total Carrying Value 15,029     15,029  
Accumulated Depreciation 9,051     9,051  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 15,029        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 9,051        
Southeastern Region | Ashton @ Waterford          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       23,015  
Initial Costs, Land and Land Improvements       3,872  
Initial Costs, Buildings and Improvements       17,538  
Total Initial Acquisition Costs       21,410  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,563  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,273  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       21,700  
Total Carrying Value 25,973     25,973  
Accumulated Depreciation 13,830     13,830  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 25,973        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 13,830        
Southeastern Region | Arbors at Lee Vista DCO          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,692  
Initial Costs, Buildings and Improvements       12,860  
Total Initial Acquisition Costs       19,552  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       12,894  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       7,264  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       25,182  
Total Carrying Value 32,446     32,446  
Accumulated Depreciation 19,618     19,618  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 32,446        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 19,618        
Southeastern Region | ORLANDO, FL          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       62,383  
Initial Costs, Land and Land Improvements       22,624  
Initial Costs, Buildings and Improvements       88,765  
Total Initial Acquisition Costs       111,389  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       100,235  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       31,123  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       180,501  
Total Carrying Value 211,624     211,624  
Accumulated Depreciation 135,495     135,495  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 211,624        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 135,495        
Southeastern Region | Legacy Hill          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,148  
Initial Costs, Buildings and Improvements       5,867  
Total Initial Acquisition Costs       7,015  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       8,807  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,764  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       14,058  
Total Carrying Value 15,822     15,822  
Accumulated Depreciation 11,246     11,246  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 15,822        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 11,246        
Southeastern Region | Hickory Run          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       1,469  
Initial Costs, Buildings and Improvements       11,584  
Total Initial Acquisition Costs       13,053  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       10,459  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       2,155  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       21,357  
Total Carrying Value 23,512     23,512  
Accumulated Depreciation 14,244     14,244  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 23,512        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 14,244        
Southeastern Region | Carrington Hills          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,117  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       2,117  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       34,535  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,506  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       32,146  
Total Carrying Value 36,652     36,652  
Accumulated Depreciation 21,305     21,305  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 36,652        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 21,305        
Southeastern Region | Brookridge          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       708  
Initial Costs, Buildings and Improvements       5,461  
Total Initial Acquisition Costs       6,169  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,830  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,162  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       9,837  
Total Carrying Value 10,999     10,999  
Accumulated Depreciation 7,007     7,007  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 10,999        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 7,007        
Southeastern Region | Breckenridge          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       766  
Initial Costs, Buildings and Improvements       7,714  
Total Initial Acquisition Costs       8,480  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       4,646  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,285  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       11,841  
Total Carrying Value 13,126     13,126  
Accumulated Depreciation 8,155     8,155  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 13,126        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 8,155        
Southeastern Region | Colonnade          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       16,677  
Initial Costs, Land and Land Improvements       1,460  
Initial Costs, Buildings and Improvements       16,015  
Total Initial Acquisition Costs       17,475  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       5,766  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       1,952  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       21,289  
Total Carrying Value 23,241     23,241  
Accumulated Depreciation 12,268     12,268  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 23,241        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 12,268        
Southeastern Region | The Preserve at Brentwood          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       21,804  
Initial Costs, Land and Land Improvements       3,182  
Initial Costs, Buildings and Improvements       24,674  
Total Initial Acquisition Costs       27,856  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,431  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       3,641  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       31,646  
Total Carrying Value 35,287     35,287  
Accumulated Depreciation 21,056     21,056  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 35,287        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 21,056        
Southeastern Region | Polo Park          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,583  
Initial Costs, Buildings and Improvements       16,293  
Total Initial Acquisition Costs       20,876  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       16,508  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,741  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       31,643  
Total Carrying Value 37,384     37,384  
Accumulated Depreciation 22,411     22,411  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 37,384        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 22,411        
Southeastern Region | NASHVILLE, TN          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       38,481  
Initial Costs, Land and Land Improvements       15,433  
Initial Costs, Buildings and Improvements       87,608  
Total Initial Acquisition Costs       103,041  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       92,982  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       22,206  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       173,817  
Total Carrying Value 196,023     196,023  
Accumulated Depreciation 117,692     117,692  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 196,023        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 117,692        
Southeastern Region | The Reserve and Park at Riverbridge          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       39,179  
Initial Costs, Land and Land Improvements       15,968  
Initial Costs, Buildings and Improvements       56,401  
Total Initial Acquisition Costs       72,369  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,823  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       16,602  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       65,590  
Total Carrying Value 82,192     82,192  
Accumulated Depreciation 40,676     40,676  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 82,192        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 40,676        
Southeastern Region | OTHER FLORIDA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       39,179  
Initial Costs, Land and Land Improvements       15,968  
Initial Costs, Buildings and Improvements       56,401  
Total Initial Acquisition Costs       72,369  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,823  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       16,602  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       65,590  
Total Carrying Value 82,192     82,192  
Accumulated Depreciation 40,676     40,676  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 82,192        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 40,676        
Northeast Region          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       77,066  
Initial Costs, Land and Land Improvements       317,831  
Initial Costs, Buildings and Improvements       1,182,479  
Total Initial Acquisition Costs       1,500,310  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       337,084  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       317,479  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       1,519,915  
Total Carrying Value 1,837,394     1,837,394  
Accumulated Depreciation 344,653     344,653  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 1,837,394        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 344,653        
Northeast Region | Garrison Square          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       5,591  
Initial Costs, Buildings and Improvements       91,027  
Total Initial Acquisition Costs       96,618  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,226  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,635  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       98,209  
Total Carrying Value 103,844     103,844  
Accumulated Depreciation 29,629     29,629  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 103,844        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 29,629        
Northeast Region | Ridge at Blue Hills          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       22,147  
Initial Costs, Land and Land Improvements       6,039  
Initial Costs, Buildings and Improvements       34,869  
Total Initial Acquisition Costs       40,908  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,479  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,113  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       36,274  
Total Carrying Value 42,387     42,387  
Accumulated Depreciation 11,196     11,196  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 42,387        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 11,196        
Northeast Region | Inwood West          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       54,919  
Initial Costs, Land and Land Improvements       20,778  
Initial Costs, Buildings and Improvements       88,096  
Total Initial Acquisition Costs       108,874  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       5,121  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       19,324  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       94,671  
Total Carrying Value 113,995     113,995  
Accumulated Depreciation 26,028     26,028  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 113,995        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 26,028        
Northeast Region | 14 North          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       10,961  
Initial Costs, Buildings and Improvements       51,175  
Total Initial Acquisition Costs       62,136  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       6,359  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       11,077  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       57,418  
Total Carrying Value 68,495     68,495  
Accumulated Depreciation 16,632     16,632  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 68,495        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 16,632        
Northeast Region | BOSTON, MA          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       77,066  
Initial Costs, Land and Land Improvements       67,953  
Initial Costs, Buildings and Improvements       265,167  
Total Initial Acquisition Costs       333,120  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       210,880  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       66,733  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       477,267  
Total Carrying Value 544,000     544,000  
Accumulated Depreciation 90,744     90,744  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 544,000        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 90,744        
Northeast Region | 10 Hanover Square          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       41,432  
Initial Costs, Buildings and Improvements       218,983  
Total Initial Acquisition Costs       260,415  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,730  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       41,496  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       228,649  
Total Carrying Value 270,145     270,145  
Accumulated Depreciation 54,457     54,457  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 270,145        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 54,457        
Northeast Region | 21 Chelsea          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       36,399  
Initial Costs, Buildings and Improvements       107,154  
Total Initial Acquisition Costs       143,553  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       12,592  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       36,414  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       119,731  
Total Carrying Value 156,145     156,145  
Accumulated Depreciation 28,031     28,031  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 156,145        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 28,031        
Northeast Region | View 34 [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       114,410  
Initial Costs, Buildings and Improvements       324,920  
Total Initial Acquisition Costs       439,330  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       96,772  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       115,026  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       421,076  
Total Carrying Value 536,102     536,102  
Accumulated Depreciation 99,652     99,652  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 536,102        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 99,652        
Northeast Region | 95 Wall Street          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       57,637  
Initial Costs, Buildings and Improvements       266,255  
Total Initial Acquisition Costs       323,892  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       7,110  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       57,810  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       273,192  
Total Carrying Value 331,002     331,002  
Accumulated Depreciation 71,769     71,769  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 331,002        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 71,769        
Northeast Region | NEW YORK, NY          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       249,878  
Initial Costs, Buildings and Improvements       917,312  
Total Initial Acquisition Costs       1,167,190  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       126,204  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       250,746  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       1,042,648  
Total Carrying Value 1,293,394     1,293,394  
Accumulated Depreciation 253,909     253,909  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 1,293,394        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 253,909        
Northeast Region | Pier 4          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       24,584  
Initial Costs, Buildings and Improvements       0  
Total Initial Acquisition Costs       24,584  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       190,695  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       24,584  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       190,695  
Total Carrying Value 215,279     215,279  
Accumulated Depreciation 7,259     7,259  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 215,279        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 7,259        
Southwestern Region          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       148,394  
Initial Costs, Land and Land Improvements       99,870  
Initial Costs, Buildings and Improvements       257,677  
Total Initial Acquisition Costs       357,547  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       89,898  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       115,906  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       331,539  
Total Carrying Value 447,445     447,445  
Accumulated Depreciation 170,852     170,852  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 447,445        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 170,852        
Southwestern Region | THIRTY377          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       29,361  
Initial Costs, Land and Land Improvements       24,036  
Initial Costs, Buildings and Improvements       32,951  
Total Initial Acquisition Costs       56,987  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       9,332  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       24,382  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       41,937  
Total Carrying Value 66,319     66,319  
Accumulated Depreciation 24,256     24,256  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 66,319        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 24,256        
Southwestern Region | Legacy Village          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       82,734  
Initial Costs, Land and Land Improvements       16,882  
Initial Costs, Buildings and Improvements       100,102  
Total Initial Acquisition Costs       116,984  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       8,827  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       17,407  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       108,404  
Total Carrying Value 125,811     125,811  
Accumulated Depreciation 50,919     50,919  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 125,811        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 50,919        
Southwestern Region | Garden Oaks          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,132  
Initial Costs, Buildings and Improvements       5,367  
Total Initial Acquisition Costs       7,499  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,812  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,947  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,364  
Total Carrying Value 9,311     9,311  
Accumulated Depreciation 1,996     1,996  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 9,311        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 1,996        
Southwestern Region | Glenwood          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       7,903  
Initial Costs, Buildings and Improvements       554  
Total Initial Acquisition Costs       8,457  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,105  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       8,159  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,403  
Total Carrying Value 10,562     10,562  
Accumulated Depreciation 1,583     1,583  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 10,562        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 1,583        
Southwestern Region | Talisker of Addison          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       10,440  
Initial Costs, Buildings and Improvements       634  
Total Initial Acquisition Costs       11,074  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,259  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       10,845  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       2,488  
Total Carrying Value 13,333     13,333  
Accumulated Depreciation 2,026     2,026  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 13,333        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,026        
Southwestern Region | Springhaven          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       6,688  
Initial Costs, Buildings and Improvements       3,354  
Total Initial Acquisition Costs       10,042  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,543  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       8,359  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       3,226  
Total Carrying Value 11,585     11,585  
Accumulated Depreciation 2,465     2,465  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 11,585        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,465        
Southwestern Region | Clipper Pointe          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       13,221  
Initial Costs, Buildings and Improvements       2,507  
Total Initial Acquisition Costs       15,728  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,615  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       15,001  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       3,342  
Total Carrying Value 18,343     18,343  
Accumulated Depreciation 2,897     2,897  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 18,343        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 2,897        
Southwestern Region | Highlands of Preston          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       2,151  
Initial Costs, Buildings and Improvements       8,168  
Total Initial Acquisition Costs       10,319  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       31,543  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       6,044  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       35,818  
Total Carrying Value 41,862     41,862  
Accumulated Depreciation 26,252     26,252  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 41,862        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 26,252        
Southwestern Region | DALLAS, TX          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       112,095  
Initial Costs, Land and Land Improvements       83,453  
Initial Costs, Buildings and Improvements       153,637  
Total Initial Acquisition Costs       237,090  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       60,036  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       97,144  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       199,982  
Total Carrying Value 297,126     297,126  
Accumulated Depreciation 112,394     112,394  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 297,126        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 112,394        
Southwestern Region | Barton Creek Landing          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       3,151  
Initial Costs, Buildings and Improvements       14,269  
Total Initial Acquisition Costs       17,420  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       22,588  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,913  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       35,095  
Total Carrying Value 40,008     40,008  
Accumulated Depreciation 22,924     22,924  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 40,008        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 22,924        
Southwestern Region | Residences at the Domain          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       36,299  
Initial Costs, Land and Land Improvements       4,034  
Initial Costs, Buildings and Improvements       55,256  
Total Initial Acquisition Costs       59,290  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       3,668  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,281  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       58,677  
Total Carrying Value 62,958     62,958  
Accumulated Depreciation 25,547     25,547  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 62,958        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 25,547        
Southwestern Region | Red Stone Ranch          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       5,084  
Initial Costs, Buildings and Improvements       17,646  
Total Initial Acquisition Costs       22,730  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       2,111  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       5,272  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       19,569  
Total Carrying Value 24,841     24,841  
Accumulated Depreciation 5,243     5,243  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 24,841        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 5,243        
Southwestern Region | Lakeline Villas          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       0  
Initial Costs, Land and Land Improvements       4,148  
Initial Costs, Buildings and Improvements       16,869  
Total Initial Acquisition Costs       21,017  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       1,495  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       4,296  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       18,216  
Total Carrying Value 22,512     22,512  
Accumulated Depreciation 4,744     4,744  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 22,512        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 4,744        
Southwestern Region | AUSTIN, TX          
Real Estate and Accumulated Depreciation [Line Items]          
Encumbrances       36,299  
Initial Costs, Land and Land Improvements       16,417  
Initial Costs, Buildings and Improvements       104,040  
Total Initial Acquisition Costs       120,457  
Costs of Improvements Capitalized Subsequent to Acquisition Costs       29,862  
Gross Amount at Which Carried at Close of Period, Land and Land Improvements       18,762  
Gross Amount at Which Carried at Close of Period, Buildings & Buildings Improvements       131,557  
Total Carrying Value 150,319     150,319  
Accumulated Depreciation 58,458     58,458  
Real Estate Owned, Gross [Roll Forward]          
Balance at end of the year 150,319        
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Balance at end of year 58,458        
Corporate Joint Venture [Member]          
Real Estate Owned, Gross [Roll Forward]          
Real estate acquired 0 0 129,437    
Retirement of fully depreciated assets 0 (112,344) (356,303)    
Real Estate Owned, Accumulated Depreciation [Roll Forward]          
Accumulated depreciation on retirements of fully depreciated assets $ 0 $ (4,228) $ (20,662)    
Secured Debt [Member]          
Real Estate and Accumulated Depreciation [Line Items]          
Deferred Finance Costs, Net       $ (5,549)  
[1] Includes unallocated accruals and capital expenditures.The aggregate cost for federal income tax purposes was approximately $8.3 billion at December 31, 2015. The estimated depreciable lives for all buildings in the latest Consolidated Statements of Operations are 35 to 55 years.