XML 148 R128.htm IDEA: XBRL DOCUMENT v3.22.4
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 928,639      
Initial Cost to Company of Land 929,089      
Initial Cost to Company of Buildings and Improvements 2,534,857      
Increase (Decrease) in Net Investments 789,064      
Carrying Amount of Land 913,390      
Carrying Amount of Buildings and Improvements 3,339,620      
Total Carrying Amount 4,253,010 $ 4,071,607 $ 4,011,326 $ 3,960,411
Accumulated Depreciation 725,143 648,461 $ 573,364 $ 478,991
Debt of Assets Held for Sale      
Unamortized Loan Costs (7,621)      
Unamortized Premium 343 $ 446    
Real estate, federal income tax basis $ 4,400,000      
Buildings        
Real Estate And Accumulated Depreciation [Line Items]        
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Real Estate Under Development        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 42,703      
Initial Cost to Company of Land 95,588      
Initial Cost to Company of Buildings and Improvements 31,205      
Increase (Decrease) in Net Investments 57,809      
Carrying Amount of Land 95,588      
Carrying Amount of Buildings and Improvements 89,014      
Total Carrying Amount 184,602      
Accumulated Depreciation      
Core Portfolio | Crescent Plaza Brockton, MA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances 0      
Initial Cost to Company of Land 1,147      
Initial Cost to Company of Buildings and Improvements 7,425      
Increase (Decrease) in Net Investments 3,504      
Carrying Amount of Land 1,147      
Carrying Amount of Buildings and Improvements 10,929      
Total Carrying Amount 12,076      
Accumulated Depreciation $ 9,405      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | New Loudon Center Latham, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 505      
Initial Cost to Company of Buildings and Improvements 4,161      
Increase (Decrease) in Net Investments 16,346      
Carrying Amount of Land 505      
Carrying Amount of Buildings and Improvements 20,507      
Total Carrying Amount 21,012      
Accumulated Depreciation $ 17,230      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Mark Plaza Edwardsville, PA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 3,396      
Increase (Decrease) in Net Investments      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 3,396      
Total Carrying Amount 3,396      
Accumulated Depreciation $ 3,153      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Plaza 422 Lebanon, PA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 190      
Initial Cost to Company of Buildings and Improvements 3,004      
Increase (Decrease) in Net Investments 2,809      
Carrying Amount of Land 190      
Carrying Amount of Buildings and Improvements 5,813      
Total Carrying Amount 6,003      
Accumulated Depreciation $ 5,370      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Route 6 Mall Honesdale, PA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 1,664      
Initial Cost to Company of Buildings and Improvements      
Increase (Decrease) in Net Investments 12,897      
Carrying Amount of Land 1,664      
Carrying Amount of Buildings and Improvements 12,897      
Total Carrying Amount 14,561      
Accumulated Depreciation $ 11,509      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Abington Towne Center Abington, PA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 799      
Initial Cost to Company of Buildings and Improvements 3,197      
Increase (Decrease) in Net Investments 4,227      
Carrying Amount of Land 799      
Carrying Amount of Buildings and Improvements 7,424      
Total Carrying Amount 8,223      
Accumulated Depreciation $ 4,898      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Bloomfield Town Square Bloomfield Hills, MI        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 3,207      
Initial Cost to Company of Buildings and Improvements 13,774      
Increase (Decrease) in Net Investments 29,476      
Carrying Amount of Land 3,207      
Carrying Amount of Buildings and Improvements 43,250      
Total Carrying Amount 46,457      
Accumulated Depreciation $ 28,386      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Elmwood Park Shopping Center Elmwood Park, NJ        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 3,248      
Initial Cost to Company of Buildings and Improvements 12,992      
Increase (Decrease) in Net Investments 21,246      
Carrying Amount of Land 3,798      
Carrying Amount of Buildings and Improvements 33,688      
Total Carrying Amount 37,486      
Accumulated Depreciation $ 22,446      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Merrillville Plaza Hobart, IN        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 4,288      
Initial Cost to Company of Buildings and Improvements 17,152      
Increase (Decrease) in Net Investments 10,646      
Carrying Amount of Land 4,288      
Carrying Amount of Buildings and Improvements 27,798      
Total Carrying Amount 32,086      
Accumulated Depreciation $ 16,271      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Marketplace of Absecon Absecon, NJ        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 2,573      
Initial Cost to Company of Buildings and Improvements 10,294      
Increase (Decrease) in Net Investments 5,796      
Carrying Amount of Land 2,577      
Carrying Amount of Buildings and Improvements 16,086      
Total Carrying Amount 18,663      
Accumulated Depreciation $ 10,495      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 239 Greenwich Avenue Greenwich, CT        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 26,000      
Initial Cost to Company of Land 1,817      
Initial Cost to Company of Buildings and Improvements 15,846      
Increase (Decrease) in Net Investments 2,892      
Carrying Amount of Land 1,817      
Carrying Amount of Buildings and Improvements 18,738      
Total Carrying Amount 20,555      
Accumulated Depreciation $ 10,158      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Hobson West Plaza Naperville, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 1,793      
Initial Cost to Company of Buildings and Improvements 7,172      
Increase (Decrease) in Net Investments 5,637      
Carrying Amount of Land 1,793      
Carrying Amount of Buildings and Improvements 12,809      
Total Carrying Amount 14,602      
Accumulated Depreciation $ 7,448      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Village Commons Shopping Center Smithtown, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 3,229      
Initial Cost to Company of Buildings and Improvements 12,917      
Increase (Decrease) in Net Investments 5,628      
Carrying Amount of Land 3,229      
Carrying Amount of Buildings and Improvements 18,545      
Total Carrying Amount 21,774      
Accumulated Depreciation $ 12,175      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Town Line Plaza Rocky Hill, CT        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 878      
Initial Cost to Company of Buildings and Improvements 3,510      
Increase (Decrease) in Net Investments 8,286      
Carrying Amount of Land 907      
Carrying Amount of Buildings and Improvements 11,767      
Total Carrying Amount 12,674      
Accumulated Depreciation $ 9,872      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Branch Shopping Center Smithtown, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 0      
Initial Cost to Company of Land 3,156      
Initial Cost to Company of Buildings and Improvements 12,545      
Increase (Decrease) in Net Investments 17,445      
Carrying Amount of Land 3,401      
Carrying Amount of Buildings and Improvements 29,745      
Total Carrying Amount 33,146      
Accumulated Depreciation $ 19,135      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Methuen Shopping Center Methuen, MA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 956      
Initial Cost to Company of Buildings and Improvements 3,826      
Increase (Decrease) in Net Investments 1,856      
Carrying Amount of Land 961      
Carrying Amount of Buildings and Improvements 5,677      
Total Carrying Amount 6,638      
Accumulated Depreciation $ 3,453      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | The Gateway Shopping Center South Burlington, VT        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,273      
Initial Cost to Company of Buildings and Improvements 5,091      
Increase (Decrease) in Net Investments 12,889      
Carrying Amount of Land 1,273      
Carrying Amount of Buildings and Improvements 17,980      
Total Carrying Amount 19,253      
Accumulated Depreciation $ 12,394      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Mad River Station Dayton, OH        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 2,350      
Initial Cost to Company of Buildings and Improvements 9,404      
Increase (Decrease) in Net Investments 2,352      
Carrying Amount of Land 2,350      
Carrying Amount of Buildings and Improvements 11,756      
Total Carrying Amount 14,106      
Accumulated Depreciation $ 7,460      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Brandywine Portfolio        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 5,063      
Initial Cost to Company of Buildings and Improvements 15,252      
Increase (Decrease) in Net Investments 2,815      
Carrying Amount of Land 5,201      
Carrying Amount of Buildings and Improvements 17,929      
Total Carrying Amount 23,130      
Accumulated Depreciation $ 8,819      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Bartow Avenue Bronx, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,691      
Initial Cost to Company of Buildings and Improvements 5,803      
Increase (Decrease) in Net Investments 1,489      
Carrying Amount of Land 1,691      
Carrying Amount of Buildings and Improvements 7,292      
Total Carrying Amount 8,983      
Accumulated Depreciation $ 3,999      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Amboy Road Staten Island, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 11,909      
Increase (Decrease) in Net Investments 3,279      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 15,188      
Total Carrying Amount 15,188      
Accumulated Depreciation $ 10,563      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Chestnut Hill Philadelphia, PA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 8,289      
Initial Cost to Company of Buildings and Improvements 5,691      
Increase (Decrease) in Net Investments 4,802      
Carrying Amount of Land 8,289      
Carrying Amount of Buildings and Improvements 10,493      
Total Carrying Amount 18,782      
Accumulated Depreciation $ 6,201      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 2914 Third Avenue Bronx, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 11,108      
Initial Cost to Company of Buildings and Improvements 8,038      
Increase (Decrease) in Net Investments 5,586      
Carrying Amount of Land 11,855      
Carrying Amount of Buildings and Improvements 12,877      
Total Carrying Amount 24,732      
Accumulated Depreciation $ 4,530      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | West 54th Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 16,699      
Initial Cost to Company of Buildings and Improvements 18,704      
Increase (Decrease) in Net Investments 1,515      
Carrying Amount of Land 16,699      
Carrying Amount of Buildings and Improvements 20,219      
Total Carrying Amount 36,918      
Accumulated Depreciation $ 8,471      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 5-7 East 17th Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 3,048      
Initial Cost to Company of Buildings and Improvements 7,281      
Increase (Decrease) in Net Investments 6,301      
Carrying Amount of Land 3,048      
Carrying Amount of Buildings and Improvements 13,582      
Total Carrying Amount 16,630      
Accumulated Depreciation $ 8,877      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 651-671 W Diversey Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 8,576      
Initial Cost to Company of Buildings and Improvements 17,256      
Increase (Decrease) in Net Investments 233      
Carrying Amount of Land 8,576      
Carrying Amount of Buildings and Improvements 17,489      
Total Carrying Amount 26,065      
Accumulated Depreciation $ 5,005      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 15 Mercer Street Manhattan NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,887      
Initial Cost to Company of Buildings and Improvements 2,483      
Increase (Decrease) in Net Investments 6      
Carrying Amount of Land 1,887      
Carrying Amount of Buildings and Improvements 2,489      
Total Carrying Amount 4,376      
Accumulated Depreciation $ 714      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 4401 White Plains Bronx, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,581      
Initial Cost to Company of Buildings and Improvements 5,054      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 1,581      
Carrying Amount of Buildings and Improvements 5,054      
Total Carrying Amount 6,635      
Accumulated Depreciation $ 1,432      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 56E Walton Chicago IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 994      
Initial Cost to Company of Buildings and Improvements 6,126      
Increase (Decrease) in Net Investments 3,016      
Carrying Amount of Land 994      
Carrying Amount of Buildings and Improvements 9,142      
Total Carrying Amount 10,136      
Accumulated Depreciation $ 1,162      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 841 W. Armitage Chicago IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 728      
Initial Cost to Company of Buildings and Improvements 1,989      
Increase (Decrease) in Net Investments 422      
Carrying Amount of Land 728      
Carrying Amount of Buildings and Improvements 2,411      
Total Carrying Amount 3,139      
Accumulated Depreciation $ 907      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 2731 N Clark Chicago IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 557      
Initial Cost to Company of Buildings and Improvements 1,839      
Increase (Decrease) in Net Investments 32      
Carrying Amount of Land 557      
Carrying Amount of Buildings and Improvements 1,871      
Total Carrying Amount 2,428      
Accumulated Depreciation $ 550      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 1520 Milwaukee Avenue Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 2,110      
Initial Cost to Company of Buildings and Improvements 1,306      
Increase (Decrease) in Net Investments 290      
Carrying Amount of Land 2,110      
Carrying Amount of Buildings and Improvements 1,596      
Total Carrying Amount 3,706      
Accumulated Depreciation $ 489      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 2140 N Clyboum Chicago IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 306      
Initial Cost to Company of Buildings and Improvements 788      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 306      
Carrying Amount of Buildings and Improvements 842      
Total Carrying Amount 1,148      
Accumulated Depreciation $ 235      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 853 W. Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 557      
Initial Cost to Company of Buildings and Improvements 1,946      
Increase (Decrease) in Net Investments 508      
Carrying Amount of Land 557      
Carrying Amount of Buildings and Improvements 2,454      
Total Carrying Amount 3,011      
Accumulated Depreciation $ 954      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Rhode Island Place Shopping Center Washington, D.C.        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 7,458      
Initial Cost to Company of Buildings and Improvements 15,968      
Increase (Decrease) in Net Investments 2,542      
Carrying Amount of Land 7,458      
Carrying Amount of Buildings and Improvements 18,510      
Total Carrying Amount 25,968      
Accumulated Depreciation $ 5,969      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 2299 N. Clybourn Avenue Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 177      
Initial Cost to Company of Buildings and Improvements 484      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 177      
Carrying Amount of Buildings and Improvements 484      
Total Carrying Amount 661      
Accumulated Depreciation $ 138      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 930 Rush Street Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 4,933      
Initial Cost to Company of Buildings and Improvements 14,587      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 4,933      
Carrying Amount of Buildings and Improvements 14,587      
Total Carrying Amount 19,520      
Accumulated Depreciation $ 3,920      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 843-45 W. Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 731      
Initial Cost to Company of Buildings and Improvements 2,730      
Increase (Decrease) in Net Investments 294      
Carrying Amount of Land 731      
Carrying Amount of Buildings and Improvements 3,024      
Total Carrying Amount 3,755      
Accumulated Depreciation $ 871      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 28 Jericho Turnpike Westbury, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 6,220      
Initial Cost to Company of Buildings and Improvements 24,416      
Increase (Decrease) in Net Investments 46      
Carrying Amount of Land 6,220      
Carrying Amount of Buildings and Improvements 24,462      
Total Carrying Amount 30,682      
Accumulated Depreciation $ 6,780      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 1525 W. Belmont Avenue Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,480      
Initial Cost to Company of Buildings and Improvements 3,338      
Increase (Decrease) in Net Investments 887      
Carrying Amount of Land 1,480      
Carrying Amount of Buildings and Improvements 4,225      
Total Carrying Amount 5,705      
Accumulated Depreciation $ 1,307      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 181 Main Street Westport, CT        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,908      
Initial Cost to Company of Buildings and Improvements 12,158      
Increase (Decrease) in Net Investments 719      
Carrying Amount of Land 1,908      
Carrying Amount of Buildings and Improvements 12,877      
Total Carrying Amount 14,785      
Accumulated Depreciation $ 3,376      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 2206-08 N. Halsted Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,183      
Initial Cost to Company of Buildings and Improvements 3,540      
Increase (Decrease) in Net Investments 359      
Carrying Amount of Land 1,183      
Carrying Amount of Buildings and Improvements 3,899      
Total Carrying Amount 5,082      
Accumulated Depreciation $ 1,302      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 83 Spring Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,754      
Initial Cost to Company of Buildings and Improvements 9,200      
Increase (Decrease) in Net Investments 33      
Carrying Amount of Land 1,754      
Carrying Amount of Buildings and Improvements 9,233      
Total Carrying Amount 10,987      
Accumulated Depreciation $ 2,415      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 2633 N. Halsted Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 960      
Initial Cost to Company of Buildings and Improvements 4,096      
Increase (Decrease) in Net Investments 359      
Carrying Amount of Land 998      
Carrying Amount of Buildings and Improvements 4,417      
Total Carrying Amount 5,415      
Accumulated Depreciation $ 1,209      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 50-54 E. Walton Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 2,848      
Initial Cost to Company of Buildings and Improvements 12,694      
Increase (Decrease) in Net Investments 642      
Carrying Amount of Land 2,848      
Carrying Amount of Buildings and Improvements 13,336      
Total Carrying Amount 16,184      
Accumulated Depreciation $ 3,732      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 179-53 & 1801-03 Connecticut Avenue Washington, D.C.        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 11,690      
Initial Cost to Company of Buildings and Improvements 10,135      
Increase (Decrease) in Net Investments 1,874      
Carrying Amount of Land 11,690      
Carrying Amount of Buildings and Improvements 12,009      
Total Carrying Amount 23,699      
Accumulated Depreciation $ 3,269      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 662 W. Diversey Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,713      
Initial Cost to Company of Buildings and Improvements 1,603      
Increase (Decrease) in Net Investments 10      
Carrying Amount of Land 1,713      
Carrying Amount of Buildings and Improvements 1,613      
Total Carrying Amount 3,326      
Accumulated Depreciation $ 406      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 639 West Diversey Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 4,429      
Initial Cost to Company of Buildings and Improvements 6,102      
Increase (Decrease) in Net Investments 1,089      
Carrying Amount of Land 4,429      
Carrying Amount of Buildings and Improvements 7,191      
Total Carrying Amount 11,620      
Accumulated Depreciation $ 2,199      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 837 W. Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 780      
Initial Cost to Company of Buildings and Improvements 1,758      
Increase (Decrease) in Net Investments 151      
Carrying Amount of Land 780      
Carrying Amount of Buildings and Improvements 1,909      
Total Carrying Amount 2,689      
Accumulated Depreciation $ 585      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 664 North Michigan Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 15,240      
Initial Cost to Company of Buildings and Improvements 65,331      
Increase (Decrease) in Net Investments 319      
Carrying Amount of Land 15,240      
Carrying Amount of Buildings and Improvements 65,650      
Total Carrying Amount 80,890      
Accumulated Depreciation $ 16,139      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 823 W. Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 717      
Initial Cost to Company of Buildings and Improvements 1,149      
Increase (Decrease) in Net Investments 95      
Carrying Amount of Land 717      
Carrying Amount of Buildings and Improvements 1,244      
Total Carrying Amount 1,961      
Accumulated Depreciation $ 329      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 8-12 E. Walton Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 5,398      
Initial Cost to Company of Buildings and Improvements 15,601      
Increase (Decrease) in Net Investments 977      
Carrying Amount of Land 5,398      
Carrying Amount of Buildings and Improvements 16,578      
Total Carrying Amount 21,976      
Accumulated Depreciation $ 4,455      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 851 W. Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 545      
Initial Cost to Company of Buildings and Improvements 209      
Increase (Decrease) in Net Investments 139      
Carrying Amount of Land 545      
Carrying Amount of Buildings and Improvements 348      
Total Carrying Amount 893      
Accumulated Depreciation $ 165      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 3200-3204 M Street Washington, DC        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 6,899      
Initial Cost to Company of Buildings and Improvements 4,249      
Increase (Decrease) in Net Investments 168      
Carrying Amount of Land 6,899      
Carrying Amount of Buildings and Improvements 4,417      
Total Carrying Amount 11,316      
Accumulated Depreciation $ 1,177      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 1240 W. Belmont Avenue Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 2,137      
Initial Cost to Company of Buildings and Improvements 1,589      
Increase (Decrease) in Net Investments 1,357      
Carrying Amount of Land 2,137      
Carrying Amount of Buildings and Improvements 2,946      
Total Carrying Amount 5,083      
Accumulated Depreciation $ 866      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 868 Broadway Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 3,519      
Initial Cost to Company of Buildings and Improvements 9,247      
Increase (Decrease) in Net Investments 5      
Carrying Amount of Land 3,519      
Carrying Amount of Buildings and Improvements 9,252      
Total Carrying Amount 12,771      
Accumulated Depreciation $ 2,100      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 21 E. Chestnut Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,318      
Initial Cost to Company of Buildings and Improvements 8,468      
Increase (Decrease) in Net Investments 44      
Carrying Amount of Land 1,318      
Carrying Amount of Buildings and Improvements 8,512      
Total Carrying Amount 9,830      
Accumulated Depreciation $ 2,146      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 313-315 Bowery Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 5,516      
Increase (Decrease) in Net Investments      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 5,516      
Total Carrying Amount 5,516      
Accumulated Depreciation $ 2,009      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 819 W. Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 790      
Initial Cost to Company of Buildings and Improvements 1,266      
Increase (Decrease) in Net Investments 594      
Carrying Amount of Land 790      
Carrying Amount of Buildings and Improvements 1,860      
Total Carrying Amount 2,650      
Accumulated Depreciation $ 463      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 120 West Broadway Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 32,819      
Increase (Decrease) in Net Investments 2,097      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 34,916      
Total Carrying Amount 34,916      
Accumulated Depreciation $ 5,277      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 11 E. Walton Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 16,744      
Initial Cost to Company of Buildings and Improvements 28,346      
Increase (Decrease) in Net Investments 1,444      
Carrying Amount of Land 16,744      
Carrying Amount of Buildings and Improvements 29,790      
Total Carrying Amount 46,534      
Accumulated Depreciation $ 6,868      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 61 Main St. Westport, CT        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 4,578      
Initial Cost to Company of Buildings and Improvements 2,645      
Increase (Decrease) in Net Investments 1,838      
Carrying Amount of Land 4,578      
Carrying Amount of Buildings and Improvements 4,483      
Total Carrying Amount 9,061      
Accumulated Depreciation $ 1,025      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 865 W. North Avenue Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,893      
Initial Cost to Company of Buildings and Improvements 11,594      
Increase (Decrease) in Net Investments 233      
Carrying Amount of Land 1,893      
Carrying Amount of Buildings and Improvements 11,827      
Total Carrying Amount 13,720      
Accumulated Depreciation $ 2,573      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 152-154 Spring St. Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 8,544      
Initial Cost to Company of Buildings and Improvements 27,001      
Increase (Decrease) in Net Investments 347      
Carrying Amount of Land 8,544      
Carrying Amount of Buildings and Improvements 27,348      
Total Carrying Amount 35,892      
Accumulated Depreciation $ 5,985      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 2520 Flatbush Ave Brooklyn, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 6,613      
Initial Cost to Company of Buildings and Improvements 10,419      
Increase (Decrease) in Net Investments 313      
Carrying Amount of Land 6,613      
Carrying Amount of Buildings and Improvements 10,732      
Total Carrying Amount 17,345      
Accumulated Depreciation $ 2,413      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 252-256 Greenwich Avenue Greenwich, CT        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 10,175      
Initial Cost to Company of Buildings and Improvements 12,641      
Increase (Decrease) in Net Investments 1,172      
Carrying Amount of Land 10,175      
Carrying Amount of Buildings and Improvements 13,813      
Total Carrying Amount 23,988      
Accumulated Depreciation $ 3,295      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Bedford Green Bedford Hills, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 12,425      
Initial Cost to Company of Buildings and Improvements 32,730      
Increase (Decrease) in Net Investments 4,690      
Carrying Amount of Land 13,765      
Carrying Amount of Buildings and Improvements 36,080      
Total Carrying Amount 49,845      
Accumulated Depreciation $ 8,479      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 131-135 Prince Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 57,536      
Increase (Decrease) in Net Investments 1,126      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 58,662      
Total Carrying Amount 58,662      
Accumulated Depreciation $ 23,530      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Shops at Grand Ave Queens, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 20,264      
Initial Cost to Company of Buildings and Improvements 33,131      
Increase (Decrease) in Net Investments 1,966      
Carrying Amount of Land 20,264      
Carrying Amount of Buildings and Improvements 35,097      
Total Carrying Amount 55,361      
Accumulated Depreciation $ 7,502      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 201 Needham St. Newton, MA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 4,550      
Initial Cost to Company of Buildings and Improvements 4,459      
Increase (Decrease) in Net Investments 110      
Carrying Amount of Land 4,550      
Carrying Amount of Buildings and Improvements 4,569      
Total Carrying Amount 9,119      
Accumulated Depreciation $ 1,000      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | City Center San Francisco, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 36,063      
Initial Cost to Company of Buildings and Improvements 109,098      
Increase (Decrease) in Net Investments (5,956)      
Carrying Amount of Land 26,386      
Carrying Amount of Buildings and Improvements 124,731      
Total Carrying Amount 151,117      
Accumulated Depreciation $ 24,771      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 163 Highland Avenue Needham, MA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 7,689      
Initial Cost to Company of Land 12,679      
Initial Cost to Company of Buildings and Improvements 11,213      
Increase (Decrease) in Net Investments (107)      
Carrying Amount of Land 12,529      
Carrying Amount of Buildings and Improvements 11,256      
Total Carrying Amount 23,785      
Accumulated Depreciation $ 2,355      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Roosevelt Galleria Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 4,838      
Initial Cost to Company of Buildings and Improvements 14,574      
Increase (Decrease) in Net Investments 559      
Carrying Amount of Land 4,838      
Carrying Amount of Buildings and Improvements 15,133      
Total Carrying Amount 19,971      
Accumulated Depreciation $ 2,717      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Route 202 Shopping Center Wilmington, DE        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 6,346      
Increase (Decrease) in Net Investments 705      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 7,051      
Total Carrying Amount 7,051      
Accumulated Depreciation $ 1,811      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 165 Newbury Street - Boston, MA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,918      
Initial Cost to Company of Buildings and Improvements 3,980      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 1,918      
Carrying Amount of Buildings and Improvements 3,980      
Total Carrying Amount 5,898      
Accumulated Depreciation $ 663      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Concord & Milwaukee - Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 2,394      
Initial Cost to Company of Land 2,739      
Initial Cost to Company of Buildings and Improvements 2,746      
Increase (Decrease) in Net Investments 486      
Carrying Amount of Land 2,739      
Carrying Amount of Buildings and Improvements 3,232      
Total Carrying Amount 5,971      
Accumulated Depreciation $ 636      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | State & Washington - Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 22,051      
Initial Cost to Company of Land 3,907      
Initial Cost to Company of Buildings and Improvements 70,943      
Increase (Decrease) in Net Investments 6,225      
Carrying Amount of Land 3,907      
Carrying Amount of Buildings and Improvements 77,168      
Total Carrying Amount 81,075      
Accumulated Depreciation $ 13,094      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 151 N. State Street Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 12,570      
Initial Cost to Company of Land 1,941      
Initial Cost to Company of Buildings and Improvements 25,529      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 1,941      
Carrying Amount of Buildings and Improvements 25,529      
Total Carrying Amount 27,470      
Accumulated Depreciation $ 4,095      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | North & Kingsbury - Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 10,891      
Initial Cost to Company of Land 18,731      
Initial Cost to Company of Buildings and Improvements 16,292      
Increase (Decrease) in Net Investments 3,066      
Carrying Amount of Land 18,731      
Carrying Amount of Buildings and Improvements 19,358      
Total Carrying Amount 38,089      
Accumulated Depreciation $ 3,068      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Sullivan Center - Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 50,000      
Initial Cost to Company of Land 13,443      
Initial Cost to Company of Buildings and Improvements 137,327      
Increase (Decrease) in Net Investments 1,590      
Carrying Amount of Land 13,443      
Carrying Amount of Buildings and Improvements 138,917      
Total Carrying Amount 152,360      
Accumulated Depreciation $ 22,243      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | California & Armitage - Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 2,243      
Initial Cost to Company of Land 6,770      
Initial Cost to Company of Buildings and Improvements 2,292      
Increase (Decrease) in Net Investments 98      
Carrying Amount of Land 6,770      
Carrying Amount of Buildings and Improvements 2,390      
Total Carrying Amount 9,160      
Accumulated Depreciation $ 405      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 555 9th Street - San Francisco, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 60,000      
Initial Cost to Company of Land 75,591      
Initial Cost to Company of Buildings and Improvements 73,268      
Increase (Decrease) in Net Investments 869      
Carrying Amount of Land 75,591      
Carrying Amount of Buildings and Improvements 74,137      
Total Carrying Amount 149,728      
Accumulated Depreciation $ 11,468      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Market Square Wilmington, DE        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 8,100      
Initial Cost to Company of Buildings and Improvements 31,221      
Increase (Decrease) in Net Investments 626      
Carrying Amount of Land 8,100      
Carrying Amount of Buildings and Improvements 31,847      
Total Carrying Amount 39,947      
Accumulated Depreciation $ 4,445      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 1324 14th Street Washington, D.C.        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 728      
Initial Cost to Company of Buildings and Improvements 3,044      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 728      
Carrying Amount of Buildings and Improvements 3,044      
Total Carrying Amount 3,772      
Accumulated Depreciation $ 76      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 1526 14th Street Washington, D.C.        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,377      
Initial Cost to Company of Buildings and Improvements 6,964      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 1,377      
Carrying Amount of Buildings and Improvements 6,964      
Total Carrying Amount 8,341      
Accumulated Depreciation      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 1529 14th Street Washington, D.C.        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,485      
Initial Cost to Company of Buildings and Improvements 10,411      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 1,485      
Carrying Amount of Buildings and Improvements 10,411      
Total Carrying Amount 11,896      
Accumulated Depreciation $ 260      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 121 Spring St Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 5,380      
Initial Cost to Company of Buildings and Improvements 31,707      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 5,380      
Carrying Amount of Buildings and Improvements 31,707      
Total Carrying Amount 37,087      
Accumulated Depreciation $ 793      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 8833 Beverly Blvd West Hollywood, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 14,423      
Initial Cost to Company of Buildings and Improvements 8,314      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 14,423      
Carrying Amount of Buildings and Improvements 8,314      
Total Carrying Amount 22,737      
Accumulated Depreciation $ 174      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Williamsburg Portfolio Brooklyn, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 31,500      
Initial Cost to Company of Buildings and Improvements 60,720      
Increase (Decrease) in Net Investments 1,856      
Carrying Amount of Land 31,500      
Carrying Amount of Buildings and Improvements 62,576      
Total Carrying Amount 94,076      
Accumulated Depreciation $ 1,280      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Henderson Portfolio Dallas, TX        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 27,086      
Initial Cost to Company of Buildings and Improvements 41,823      
Increase (Decrease) in Net Investments 255      
Carrying Amount of Land 27,086      
Carrying Amount of Buildings and Improvements 42,078      
Total Carrying Amount 69,164      
Accumulated Depreciation $ 918      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 991 Madison Avenue Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 76,965      
Increase (Decrease) in Net Investments (75,370)      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 1,595      
Total Carrying Amount 1,595      
Accumulated Depreciation $ 631      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 613-623 W. Diversey Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 10,061      
Initial Cost to Company of Buildings and Improvements 2,773      
Increase (Decrease) in Net Investments 11,717      
Carrying Amount of Land 10,061      
Carrying Amount of Buildings and Improvements 14,490      
Total Carrying Amount 24,551      
Accumulated Depreciation $ 4,303      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 51 Greene Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 4,488      
Initial Cost to Company of Buildings and Improvements 8,992      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 4,488      
Carrying Amount of Buildings and Improvements 9,092      
Total Carrying Amount 13,580      
Accumulated Depreciation $ 870      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 53 Greene Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 3,605      
Initial Cost to Company of Buildings and Improvements 12,177      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 3,605      
Carrying Amount of Buildings and Improvements 12,179      
Total Carrying Amount 15,784      
Accumulated Depreciation $ 1,142      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 41 Greene Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 6,276      
Initial Cost to Company of Buildings and Improvements 9,582      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 6,276      
Carrying Amount of Buildings and Improvements 9,582      
Total Carrying Amount 15,858      
Accumulated Depreciation $ 858      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 47 Greene Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 6,265      
Initial Cost to Company of Buildings and Improvements 16,758      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 6,265      
Carrying Amount of Buildings and Improvements 16,764      
Total Carrying Amount 23,029      
Accumulated Depreciation $ 1,432      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 849 W Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 837      
Initial Cost to Company of Buildings and Improvements 2,731      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 837      
Carrying Amount of Buildings and Improvements 2,731      
Total Carrying Amount 3,568      
Accumulated Depreciation $ 239      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 912 W Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 982      
Initial Cost to Company of Buildings and Improvements 2,868      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 982      
Carrying Amount of Buildings and Improvements 3,051      
Total Carrying Amount 4,033      
Accumulated Depreciation $ 267      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Melrose Place Collection Los Angeles, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 20,490      
Initial Cost to Company of Buildings and Improvements 26,788      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 20,490      
Carrying Amount of Buildings and Improvements 26,788      
Total Carrying Amount 47,278      
Accumulated Depreciation $ 2,128      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 45 Greene Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 2,903      
Initial Cost to Company of Buildings and Improvements 8,487      
Increase (Decrease) in Net Investments 288      
Carrying Amount of Land 2,903      
Carrying Amount of Buildings and Improvements 8,775      
Total Carrying Amount 11,678      
Accumulated Depreciation $ 713      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 565 Broadway Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 22,491      
Increase (Decrease) in Net Investments 1,123      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 23,614      
Total Carrying Amount 23,614      
Accumulated Depreciation $ 1,747      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 907 W Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 700      
Initial Cost to Company of Buildings and Improvements 2,081      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 700      
Carrying Amount of Buildings and Improvements 2,081      
Total Carrying Amount 2,781      
Accumulated Depreciation $ 175      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 37 Greene Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 6,721      
Initial Cost to Company of Buildings and Improvements 9,119      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 6,721      
Carrying Amount of Buildings and Improvements 9,119      
Total Carrying Amount 15,840      
Accumulated Depreciation $ 684      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | 917 W Armitage Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 901      
Initial Cost to Company of Buildings and Improvements 2,368      
Increase (Decrease) in Net Investments      
Carrying Amount of Land 901      
Carrying Amount of Buildings and Improvements 2,368      
Total Carrying Amount 3,269      
Accumulated Depreciation $ 187      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Brandywine Town Center Wilmington, DE        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 15,632      
Initial Cost to Company of Buildings and Improvements 101,861      
Increase (Decrease) in Net Investments 7,855      
Carrying Amount of Land 15,632      
Carrying Amount of Buildings and Improvements 109,716      
Total Carrying Amount 125,348      
Accumulated Depreciation $ 8,421      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Canton Marketplace Canton, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 31,801      
Initial Cost to Company of Land 11,883      
Initial Cost to Company of Buildings and Improvements 34,902      
Increase (Decrease) in Net Investments 1,187      
Carrying Amount of Land 11,883      
Carrying Amount of Buildings and Improvements 36,089      
Total Carrying Amount 47,972      
Accumulated Depreciation $ 1,350      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Monroe Marketplace Selinsgrove, PA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 29,150      
Initial Cost to Company of Land 8,755      
Initial Cost to Company of Buildings and Improvements 35,452      
Increase (Decrease) in Net Investments 406      
Carrying Amount of Land 8,755      
Carrying Amount of Buildings and Improvements 35,858      
Total Carrying Amount 44,613      
Accumulated Depreciation $ 1,482      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Core Portfolio | Midstate Mall East Brunswick, NJ        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 42,400      
Initial Cost to Company of Land 13,062      
Initial Cost to Company of Buildings and Improvements 43,290      
Increase (Decrease) in Net Investments 463      
Carrying Amount of Land 13,062      
Carrying Amount of Buildings and Improvements 43,753      
Total Carrying Amount 56,815      
Accumulated Depreciation $ 1,543      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund II | City Point        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 133,655      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 100,316      
Increase (Decrease) in Net Investments 529,026      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 629,342      
Total Carrying Amount 629,342      
Accumulated Depreciation $ 115,052      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund III | 640 Broadway Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 35,970      
Initial Cost to Company of Land 27,831      
Initial Cost to Company of Buildings and Improvements 27,291      
Increase (Decrease) in Net Investments 572      
Carrying Amount of Land 27,831      
Carrying Amount of Buildings and Improvements 27,863      
Total Carrying Amount 55,694      
Accumulated Depreciation $ 639      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 210 Bowery Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 1,875      
Initial Cost to Company of Buildings and Improvements 5,625      
Increase (Decrease) in Net Investments (6,490)      
Carrying Amount of Land 518      
Carrying Amount of Buildings and Improvements 492      
Total Carrying Amount 1,010      
Accumulated Depreciation $ 192      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 27 E. 61st Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 15,002      
Initial Cost to Company of Land 4,813      
Initial Cost to Company of Buildings and Improvements 14,438      
Increase (Decrease) in Net Investments 1,658      
Carrying Amount of Land 3,523      
Carrying Amount of Buildings and Improvements 17,386      
Total Carrying Amount 20,909      
Accumulated Depreciation $ 2,707      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 17 E. 71st Street Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 7,391      
Initial Cost to Company of Buildings and Improvements 20,176      
Increase (Decrease) in Net Investments 338      
Carrying Amount of Land 7,391      
Carrying Amount of Buildings and Improvements 20,514      
Total Carrying Amount 27,905      
Accumulated Depreciation $ 4,356      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 1035 Third Ave Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 7,473      
Initial Cost to Company of Land 12,759      
Initial Cost to Company of Buildings and Improvements 37,431      
Increase (Decrease) in Net Investments 5,842      
Carrying Amount of Land 14,100      
Carrying Amount of Buildings and Improvements 41,932      
Total Carrying Amount 56,032      
Accumulated Depreciation $ 9,494      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 801 Madison Avenue Manhattan, NY        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 16,725      
Initial Cost to Company of Land 4,178      
Initial Cost to Company of Buildings and Improvements 28,470      
Increase (Decrease) in Net Investments (4,885)      
Carrying Amount of Land 2,922      
Carrying Amount of Buildings and Improvements 24,841      
Total Carrying Amount 27,763      
Accumulated Depreciation $ 3,842      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 2208-2216 Fillmore Street San Francisco, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 5,397      
Initial Cost to Company of Land 3,027      
Initial Cost to Company of Buildings and Improvements 6,376      
Increase (Decrease) in Net Investments 205      
Carrying Amount of Land 3,027      
Carrying Amount of Buildings and Improvements 6,581      
Total Carrying Amount 9,608      
Accumulated Depreciation $ 1,192      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 2207 Fillmore Street San Francisco, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 1,120      
Initial Cost to Company of Land 1,498      
Initial Cost to Company of Buildings and Improvements 1,735      
Increase (Decrease) in Net Investments 125      
Carrying Amount of Land 1,498      
Carrying Amount of Buildings and Improvements 1,860      
Total Carrying Amount 3,358      
Accumulated Depreciation $ 355      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 1964 Union Street San Francisco, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 1,381      
Initial Cost to Company of Land 563      
Initial Cost to Company of Buildings and Improvements 1,688      
Increase (Decrease) in Net Investments 2,071      
Carrying Amount of Land 563      
Carrying Amount of Buildings and Improvements 3,759      
Total Carrying Amount 4,322      
Accumulated Depreciation $ 499      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | Restaurants at Fort Point - Boston, MA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 5,855      
Initial Cost to Company of Land 1,041      
Initial Cost to Company of Buildings and Improvements 10,905      
Increase (Decrease) in Net Investments 182      
Carrying Amount of Land 1,041      
Carrying Amount of Buildings and Improvements 11,087      
Total Carrying Amount 12,128      
Accumulated Depreciation $ 1,967      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 717 N. Michigan Avenue, Chicago, IL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 5,796      
Initial Cost to Company of Land 8,675      
Initial Cost to Company of Buildings and Improvements 4,235      
Increase (Decrease) in Net Investments (2,744)      
Carrying Amount of Land 6,847      
Carrying Amount of Buildings and Improvements 3,319      
Total Carrying Amount 10,166      
Accumulated Depreciation $ 104      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 18 E. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 1,515      
Initial Cost to Company of Land 609      
Initial Cost to Company of Buildings and Improvements 1,513      
Increase (Decrease) in Net Investments 57      
Carrying Amount of Land 609      
Carrying Amount of Buildings and Improvements 1,570      
Total Carrying Amount 2,179      
Accumulated Depreciation $ 168      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 20 E. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 989      
Initial Cost to Company of Land 588      
Initial Cost to Company of Buildings and Improvements 937      
Increase (Decrease) in Net Investments 12      
Carrying Amount of Land 588      
Carrying Amount of Buildings and Improvements 949      
Total Carrying Amount 1,537      
Accumulated Depreciation $ 102      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 25 E. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 3,117      
Initial Cost to Company of Land 1,324      
Initial Cost to Company of Buildings and Improvements 2,459      
Increase (Decrease) in Net Investments 364      
Carrying Amount of Land 1,324      
Carrying Amount of Buildings and Improvements 2,823      
Total Carrying Amount 4,147      
Accumulated Depreciation $ 392      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 109 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 6,341      
Initial Cost to Company of Land 2,343      
Initial Cost to Company of Buildings and Improvements 6,560      
Increase (Decrease) in Net Investments 351      
Carrying Amount of Land 2,343      
Carrying Amount of Buildings and Improvements 6,911      
Total Carrying Amount 9,254      
Accumulated Depreciation $ 752      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 204-206 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 892      
Initial Cost to Company of Land 547      
Initial Cost to Company of Buildings and Improvements 439      
Increase (Decrease) in Net Investments 47      
Carrying Amount of Land 547      
Carrying Amount of Buildings and Improvements 486      
Total Carrying Amount 1,033      
Accumulated Depreciation $ 61      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 216-218 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 2,612      
Initial Cost to Company of Land 1,160      
Initial Cost to Company of Buildings and Improvements 2,736      
Increase (Decrease) in Net Investments 2,031      
Carrying Amount of Land 1,160      
Carrying Amount of Buildings and Improvements 4,767      
Total Carrying Amount 5,927      
Accumulated Depreciation $ 631      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 220 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 1,827      
Initial Cost to Company of Land 619      
Initial Cost to Company of Buildings and Improvements 1,799      
Increase (Decrease) in Net Investments 985      
Carrying Amount of Land 619      
Carrying Amount of Buildings and Improvements 2,784      
Total Carrying Amount 3,403      
Accumulated Depreciation $ 387      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 223 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 892      
Initial Cost to Company of Land 465      
Initial Cost to Company of Buildings and Improvements 688      
Increase (Decrease) in Net Investments 33      
Carrying Amount of Land 465      
Carrying Amount of Buildings and Improvements 721      
Total Carrying Amount 1,186      
Accumulated Depreciation $ 77      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 226-228 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land 660      
Initial Cost to Company of Buildings and Improvements 1,900      
Increase (Decrease) in Net Investments 34      
Carrying Amount of Land 660      
Carrying Amount of Buildings and Improvements 1,934      
Total Carrying Amount 2,594      
Accumulated Depreciation $ 210      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 309/311 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 2,300      
Initial Cost to Company of Land 1,160      
Initial Cost to Company of Buildings and Improvements 2,695      
Increase (Decrease) in Net Investments 30      
Carrying Amount of Land 1,160      
Carrying Amount of Buildings and Improvements 2,725      
Total Carrying Amount 3,885      
Accumulated Depreciation $ 287      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 230-240 W. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 4,955      
Initial Cost to Company of Land 2,185      
Initial Cost to Company of Buildings and Improvements 9,597      
Increase (Decrease) in Net Investments 6      
Carrying Amount of Land 2,185      
Carrying Amount of Buildings and Improvements 9,603      
Total Carrying Amount 11,788      
Accumulated Depreciation $ 621      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 102 E. Broughton St. Savannah, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 514      
Increase (Decrease) in Net Investments      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 514      
Total Carrying Amount 514      
Accumulated Depreciation $ 33      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund IV | 146 Geary St. San Francisco, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 19,338      
Initial Cost to Company of Land 9,500      
Initial Cost to Company of Buildings and Improvements 28,500      
Increase (Decrease) in Net Investments (12,896)      
Carrying Amount of Land 5,243      
Carrying Amount of Buildings and Improvements 19,861      
Total Carrying Amount 25,104      
Accumulated Depreciation $ 1,608      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Plaza Santa Fe Santa Fe, NM        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 22,893      
Initial Cost to Company of Land      
Initial Cost to Company of Buildings and Improvements 28,214      
Increase (Decrease) in Net Investments 1,402      
Carrying Amount of Land      
Carrying Amount of Buildings and Improvements 29,616      
Total Carrying Amount 29,616      
Accumulated Depreciation $ 4,657      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Hickory Ridge - Hickory, NC        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 28,351      
Initial Cost to Company of Land 7,852      
Initial Cost to Company of Buildings and Improvements 29,998      
Increase (Decrease) in Net Investments 4,877      
Carrying Amount of Land 7,852      
Carrying Amount of Buildings and Improvements 34,875      
Total Carrying Amount 42,727      
Accumulated Depreciation $ 5,746      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | New Towne Plaza - Canton, MI        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 14,716      
Initial Cost to Company of Land 5,040      
Initial Cost to Company of Buildings and Improvements 17,391      
Increase (Decrease) in Net Investments 587      
Carrying Amount of Land 4,719      
Carrying Amount of Buildings and Improvements 18,299      
Total Carrying Amount 23,018      
Accumulated Depreciation $ 2,910      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Fairlane Green Allen Park, MI        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 32,877      
Initial Cost to Company of Land 18,121      
Initial Cost to Company of Buildings and Improvements 37,143      
Increase (Decrease) in Net Investments 3,174      
Carrying Amount of Land 18,121      
Carrying Amount of Buildings and Improvements 40,317      
Total Carrying Amount 58,438      
Accumulated Depreciation $ 5,424      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Trussville Promenade Birmingham, AL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 28,831      
Initial Cost to Company of Land 7,587      
Initial Cost to Company of Buildings and Improvements 34,285      
Increase (Decrease) in Net Investments 50      
Carrying Amount of Land 7,587      
Carrying Amount of Buildings and Improvements 34,335      
Total Carrying Amount 41,922      
Accumulated Depreciation $ 4,518      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Elk Grove Commons Elk Grove, CA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 40,990      
Initial Cost to Company of Land 6,204      
Initial Cost to Company of Buildings and Improvements 48,008      
Increase (Decrease) in Net Investments 1,766      
Carrying Amount of Land 6,204      
Carrying Amount of Buildings and Improvements 49,774      
Total Carrying Amount 55,978      
Accumulated Depreciation $ 5,790      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Hiram Pavilion Hiram, GA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 28,341      
Initial Cost to Company of Land 13,029      
Initial Cost to Company of Buildings and Improvements 25,446      
Increase (Decrease) in Net Investments 557      
Carrying Amount of Land 13,029      
Carrying Amount of Buildings and Improvements 26,003      
Total Carrying Amount 39,032      
Accumulated Depreciation $ 3,537      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Palm Coast Landing Palm Coast, FL        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 26,409      
Initial Cost to Company of Land 7,066      
Initial Cost to Company of Buildings and Improvements 27,299      
Increase (Decrease) in Net Investments 433      
Carrying Amount of Land 7,066      
Carrying Amount of Buildings and Improvements 27,732      
Total Carrying Amount 34,798      
Accumulated Depreciation $ 3,134      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Lincoln Commons Lincoln, RI        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 38,722      
Initial Cost to Company of Land 14,429      
Initial Cost to Company of Buildings and Improvements 34,417      
Increase (Decrease) in Net Investments 4,876      
Carrying Amount of Land 14,429      
Carrying Amount of Buildings and Improvements 39,293      
Total Carrying Amount 53,722      
Accumulated Depreciation $ 3,994      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years      
Opportunity Funds | Fund V | Landstown Commons Virginia Beach, VA        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances $ 60,743      
Initial Cost to Company of Land 10,222      
Initial Cost to Company of Buildings and Improvements 69,005      
Increase (Decrease) in Net Investments 4,116      
Carrying Amount of Land 10,222      
Carrying Amount of Buildings and Improvements 73,121      
Total Carrying Amount 83,343      
Accumulated Depreciation $ 6,647      
Life on which Depreciation in Latest Statement of Operations is Compared 40 years