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Schedule III - Real Estate and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 800,513    
Acquisition Costs, Buildings and Improvements 787,014    
Costs Capitalized Subsequent to Acquisition, Land (542)    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 267,058    
Gross Amount at Which Carried at Close of Period , Land 799,971    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,054,072    
Total 1,854,043 $ 1,734,892 $ 1,668,351
Accumulated Depreciation (139,483) $ (89,940) $ (29,076)
Construction in Process [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 224,904    
Gross Amount at Which Carried at Close of Period, Building and Improvements 224,904    
Total 224,904    
The Mall at Sears - Anchorage, AK [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land 11,517    
Acquisition Costs, Buildings and Improvements 11,729    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 884    
Gross Amount at Which Carried at Close of Period , Land 11,517    
Gross Amount at Which Carried at Close of Period, Building and Improvements 12,613    
Total 24,130    
Accumulated Depreciation $ (2,209)    
Date Acquired 2015-07    
Stand-Alone Location - Cullman, AL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 947    
Acquisition Costs, Buildings and Improvements 846    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,616    
Gross Amount at Which Carried at Close of Period , Land 947    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,462    
Total 3,409    
Accumulated Depreciation $ (200)    
Date Acquired 2015-07    
McCain Mall - North Little Rock, AR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,288    
Acquisition Costs, Buildings and Improvements 2,881    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,288    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,881    
Total 4,169    
Accumulated Depreciation $ (656)    
Date Acquired 2015-07    
Stand-Alone Location - Russellville, AR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 318    
Acquisition Costs, Buildings and Improvements 1,270    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 318    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,270    
Total 1,588    
Accumulated Depreciation $ (253)    
Date Acquired 2015-07    
Flagstaff Mall - Flagstaff, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 932    
Acquisition Costs, Buildings and Improvements 2,179    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 932    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,179    
Total 3,111    
Accumulated Depreciation $ (372)    
Date Acquired 2015-07    
Superstition Springs Center - Mesa/East, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,661    
Acquisition Costs, Buildings and Improvements 2,559    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,661    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,559    
Total 5,220    
Accumulated Depreciation $ (582)    
Date Acquired 2015-07    
Shopping Center - Peoria, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,204    
Acquisition Costs, Buildings and Improvements 509    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,204    
Gross Amount at Which Carried at Close of Period, Building and Improvements 509    
Total 1,713    
Accumulated Depreciation $ (245)    
Date Acquired 2015-07    
Desert Sky Mall - Phoenix, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,605    
Acquisition Costs, Buildings and Improvements 2,448    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,605    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,448    
Total 5,053    
Accumulated Depreciation $ (501)    
Date Acquired 2015-07    
Stand-Alone Location - Phoenix, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 568    
Acquisition Costs, Buildings and Improvements 1,088    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 13    
Gross Amount at Which Carried at Close of Period , Land 568    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,101    
Total 1,669    
Accumulated Depreciation $ (322)    
Date Acquired 2015-07    
Prescott Gateway - Prescott, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,071    
Acquisition Costs, Buildings and Improvements 835    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,071    
Gross Amount at Which Carried at Close of Period, Building and Improvements 835    
Total 1,906    
Accumulated Depreciation $ (314)    
Date Acquired 2015-07    
Mall at Sierra Vista - Sierra Vista, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,252    
Acquisition Costs, Buildings and Improvements 1,791    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,252    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,791    
Total 3,043    
Accumulated Depreciation $ (305)    
Date Acquired 2015-07    
Stand-Alone Location - Sierra Vista, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 938    
Acquisition Costs, Buildings and Improvements 1,736    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 938    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,736    
Total 2,674    
Accumulated Depreciation $ (470)    
Date Acquired 2015-07    
Park Place - Tucson, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,207    
Acquisition Costs, Buildings and Improvements 3,458    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,207    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,458    
Total 8,665    
Accumulated Depreciation $ (683)    
Date Acquired 2015-07    
Southgate Mall - Yuma, AZ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,485    
Acquisition Costs, Buildings and Improvements 1,596    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,485    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,596    
Total 3,081    
Accumulated Depreciation $ (468)    
Date Acquired 2015-07    
Kmart Center - Antioch, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,594    
Acquisition Costs, Buildings and Improvements 2,525    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,594    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,525    
Total 4,119    
Accumulated Depreciation $ (428)    
Date Acquired 2015-07    
Big Bear Lake Shopping Center - Big Bear Lake, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,664    
Acquisition Costs, Buildings and Improvements 2,945    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 66    
Gross Amount at Which Carried at Close of Period , Land 3,664    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,011    
Total 6,675    
Accumulated Depreciation $ (426)    
Date Acquired 2015-07    
Southbay Pavilion - Carson, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 11,476    
Acquisition Costs, Buildings and Improvements 5,223    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 64    
Gross Amount at Which Carried at Close of Period , Land 11,476    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,287    
Total 16,763    
Accumulated Depreciation $ (958)    
Date Acquired 2015-07    
Chula Vista Center - Chula Vista, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 7,315    
Acquisition Costs, Buildings and Improvements 6,834    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 7,315    
Gross Amount at Which Carried at Close of Period, Building and Improvements 6,834    
Total 14,149    
Accumulated Depreciation $ (1,044)    
Date Acquired 2015-07    
Sunrise Mall - Citrus Heights, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,778    
Acquisition Costs, Buildings and Improvements 2,088    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,778    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,088    
Total 5,866    
Accumulated Depreciation $ (994)    
Date Acquired 2015-07    
Stand-Alone Location - Delano, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,905    
Acquisition Costs, Buildings and Improvements 2,208    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,905    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,208    
Total 4,113    
Accumulated Depreciation $ (404)    
Date Acquired 2015-07    
Westfield Parkway - El Cajon, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 10,573    
Acquisition Costs, Buildings and Improvements 2,883    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 10,573    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,883    
Total 13,456    
Accumulated Depreciation $ (1,111)    
Date Acquired 2015-07    
Imperial Valley Mall - El Centro, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,877    
Acquisition Costs, Buildings and Improvements 3,977    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,877    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,977    
Total 7,854    
Accumulated Depreciation $ (700)    
Date Acquired 2015-07    
Westfield Solano - Fairfield, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,679    
Acquisition Costs, Buildings and Improvements 1,366    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,679    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,366    
Total 5,045    
Accumulated Depreciation $ (310)    
Date Acquired 2015-07    
Florin Mall - Florin, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,022    
Acquisition Costs, Buildings and Improvements 1,366    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,022    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,366    
Total 2,388    
Accumulated Depreciation $ (418)    
Date Acquired 2015-07    
Manchester Center - Fresno, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,370    
Acquisition Costs, Buildings and Improvements 2,000    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,370    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,000    
Total 3,370    
Accumulated Depreciation $ (877)    
Date Acquired 2015-07    
Mill Creek Marketplace - McKinleyville, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,354    
Acquisition Costs, Buildings and Improvements 1,655    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,354    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,655    
Total 3,009    
Accumulated Depreciation $ (394)    
Date Acquired 2015-07    
Merced Mall - Merced, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,534    
Acquisition Costs, Buildings and Improvements 1,604    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,534    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,604    
Total 4,138    
Accumulated Depreciation $ (557)    
Date Acquired 2015-07    
Montclair Plaza - Montclair, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,498    
Acquisition Costs, Buildings and Improvements 2,119    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,498    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,119    
Total 4,617    
Accumulated Depreciation $ (223)    
Date Acquired 2015-07    
Moreno Valley Mall at Towngate - Moreno Vly, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,898    
Acquisition Costs, Buildings and Improvements 3,407    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,898    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,407    
Total 7,305    
Accumulated Depreciation $ (690)    
Date Acquired 2015-07    
New Park Mall - Newark, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,312    
Acquisition Costs, Buildings and Improvements 3,268    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,312    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,268    
Total 7,580    
Accumulated Depreciation $ (818)    
Date Acquired 2015-07    
Valley Plaza - North Hollywood, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 8,049    
Acquisition Costs, Buildings and Improvements 3,172    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 8,049    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,172    
Total 11,221    
Accumulated Depreciation $ (314)    
Date Acquired 2015-07    
Westfield Palm Desert - Palm Desert, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,473    
Acquisition Costs, Buildings and Improvements 1,705    
Costs Capitalized Subsequent to Acquisition, Land (542)    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (169)    
Gross Amount at Which Carried at Close of Period , Land 4,931    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,536    
Total 6,467    
Accumulated Depreciation $ (383)    
Date Acquired 2015-07    
Ramona Station Ramona CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 7,239    
Acquisition Costs, Buildings and Improvements 1,452    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 16    
Gross Amount at Which Carried at Close of Period , Land 7,239    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,468    
Total 8,707    
Accumulated Depreciation $ (434)    
Date Acquired 2015-07    
Stand-Alone Location One - Riverside, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,397    
Acquisition Costs, Buildings and Improvements 4,407    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,397    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,407    
Total 8,804    
Accumulated Depreciation $ (1,062)    
Date Acquired 2015-07    
Stand-Alone Location Two - Riverside, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,670    
Acquisition Costs, Buildings and Improvements 2,489    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 54    
Gross Amount at Which Carried at Close of Period , Land 2,670    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,543    
Total 5,213    
Accumulated Depreciation $ (567)    
Date Acquired 2015-07    
Westfield Galleria at Roseville - Roseville, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,848    
Acquisition Costs, Buildings and Improvements 3,215    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,848    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,215    
Total 8,063    
Accumulated Depreciation $ (553)    
Date Acquired 2015-07    
Northridge Center - Salinas, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,644    
Acquisition Costs, Buildings and Improvements 4,394    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,644    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,394    
Total 7,038    
Accumulated Depreciation $ (844)    
Date Acquired 2015-07    
Inland Center - San Bernardino, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,131    
Acquisition Costs, Buildings and Improvements 2,066    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,131    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,066    
Total 6,197    
Accumulated Depreciation $ (639)    
Date Acquired 2015-07    
Shops at Tanforan - San Bruno, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 7,854    
Acquisition Costs, Buildings and Improvements 4,642    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 7,854    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,642    
Total 12,496    
Accumulated Depreciation $ (932)    
Date Acquired 2015-07    
Westfield UTC - San Diego-North, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 22,445    
Acquisition Costs, Buildings and Improvements 14,094    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,605    
Gross Amount at Which Carried at Close of Period , Land 22,445    
Gross Amount at Which Carried at Close of Period, Building and Improvements 16,699    
Total 39,144    
Accumulated Depreciation $ (1,529)    
Date Acquired 2015-07    
Eastridge Mall - San Jose-Eastridge, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,531    
Acquisition Costs, Buildings and Improvements 2,356    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,531    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,356    
Total 3,887    
Accumulated Depreciation $ (1,042)    
Date Acquired 2015-07    
Capitola Mall - Santa Cruz, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,338    
Acquisition Costs, Buildings and Improvements 4,803    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,338    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,803    
Total 9,141    
Accumulated Depreciation $ (684)    
Date Acquired 2015-07    
Town Center Mall 81 - Santa Maria, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,967    
Acquisition Costs, Buildings and Improvements 2,635    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,967    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,635    
Total 6,602    
Accumulated Depreciation $ (371)    
Date Acquired 2015-07    
Stand-Alone Location - Santa Monica, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 43,916    
Acquisition Costs, Buildings and Improvements 3,973    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 43,916    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,973    
Total 47,889    
Accumulated Depreciation $ (395)    
Date Acquired 2015-07    
Stand Alone Location - Santa Paula, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,002    
Acquisition Costs, Buildings and Improvements 1,147    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,002    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,147    
Total 3,149    
Accumulated Depreciation $ (426)    
Date Acquired 2015-07    
Promenade in Temecula - Temecula, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,098    
Acquisition Costs, Buildings and Improvements 2,214    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,098    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,214    
Total 8,312    
Accumulated Depreciation $ (676)    
Date Acquired 2015-07    
Janss Marketplace - Thousand Oaks, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 9,853    
Acquisition Costs, Buildings and Improvements 14,785    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,804    
Gross Amount at Which Carried at Close of Period , Land 9,853    
Gross Amount at Which Carried at Close of Period, Building and Improvements 17,589    
Total 27,442    
Accumulated Depreciation $ (1,637)    
Date Acquired 2015-07    
Pacific View Mall - Ventura, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,578    
Acquisition Costs, Buildings and Improvements 6,172    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,578    
Gross Amount at Which Carried at Close of Period, Building and Improvements 6,172    
Total 11,750    
Accumulated Depreciation $ (385)    
Date Acquired 2015-07    
Sequoia Mall - Visalia, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,967    
Acquisition Costs, Buildings and Improvements 2,243    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,967    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,243    
Total 5,210    
Accumulated Depreciation $ (408)    
Date Acquired 2015-07    
Westfield West Covina -West Covina, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,972    
Acquisition Costs, Buildings and Improvements 2,053    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,972    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,053    
Total 8,025    
Accumulated Depreciation $ (762)    
Date Acquired 2015-07    
Westminster Mall - Westminster, CA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,845    
Acquisition Costs, Buildings and Improvements 5,651    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,845    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,651    
Total 12,496    
Accumulated Depreciation $ (884)    
Date Acquired 2015-07    
Westland Shopping Center - Lakewood, CO [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,290    
Acquisition Costs, Buildings and Improvements 4,550    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,290    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,550    
Total 5,840    
Accumulated Depreciation $ (571)    
Date Acquired 2015-07    
Thornton Place - Thornton, CO [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,881    
Acquisition Costs, Buildings and Improvements 1,300    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,881    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,300    
Total 3,181    
Accumulated Depreciation $ (839)    
Date Acquired 2015-07    
Crystal Mall - Waterford, CT [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,371    
Acquisition Costs, Buildings and Improvements 2,534    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,371    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,534    
Total 3,905    
Accumulated Depreciation $ (503)    
Date Acquired 2015-07    
Corbin's Corner - West Hartford, CT [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,434    
Acquisition Costs, Buildings and Improvements 10,466    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,434    
Gross Amount at Which Carried at Close of Period, Building and Improvements 10,466    
Total 16,900    
Accumulated Depreciation $ (999)    
Date Acquired 2015-07    
Stand-Alone Location - Rehoboth Beach, DE [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 714    
Acquisition Costs, Buildings and Improvements 4,523    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,373    
Gross Amount at Which Carried at Close of Period , Land 714    
Gross Amount at Which Carried at Close of Period, Building and Improvements 9,896    
Total 10,610    
Accumulated Depreciation $ (713)    
Date Acquired 2015-07    
Town Center at Boca - Raton Boca Raton, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 16,090    
Acquisition Costs, Buildings and Improvements 7,479    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 16,090    
Gross Amount at Which Carried at Close of Period, Building and Improvements 7,479    
Total 23,569    
Accumulated Depreciation $ (1,080)    
Date Acquired 2015-07    
DeSoto Square - Bradenton, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 958    
Acquisition Costs, Buildings and Improvements 900    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7    
Gross Amount at Which Carried at Close of Period , Land 958    
Gross Amount at Which Carried at Close of Period, Building and Improvements 907    
Total 1,865    
Accumulated Depreciation $ (447)    
Date Acquired 2015-07    
Westfield Countryside - Clearwater/Cntrysd FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,852    
Acquisition Costs, Buildings and Improvements 17,777    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 834    
Gross Amount at Which Carried at Close of Period , Land 5,852    
Gross Amount at Which Carried at Close of Period, Building and Improvements 18,611    
Total 24,463    
Accumulated Depreciation $ (1,726)    
Date Acquired 2015-07    
Beachway Plaza - Bradenton, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,420    
Acquisition Costs, Buildings and Improvements 1,479    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,420    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,479    
Total 2,899    
Accumulated Depreciation $ (362)    
Date Acquired 2015-07    
Miami International Mall - Doral, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 9,214    
Acquisition Costs, Buildings and Improvements 2,654    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 9,214    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,654    
Total 11,868    
Accumulated Depreciation $ (782)    
Date Acquired 2015-07    
Edison Mall - Ft. Myers, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,168    
Acquisition Costs, Buildings and Improvements 2,853    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,168    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,853    
Total 6,021    
Accumulated Depreciation $ (484)    
Date Acquired 2015-07    
Westfield Hialeah - Hialeah/Westland, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 9,683    
Acquisition Costs, Buildings and Improvements 3,472    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,438    
Gross Amount at Which Carried at Close of Period , Land 9,683    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,910    
Total 14,593    
Accumulated Depreciation $ (700)    
Date Acquired 2015-07    
The Oaks Mall - Gainesville, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,439    
Acquisition Costs, Buildings and Improvements 1,205    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,439    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,205    
Total 3,644    
Accumulated Depreciation $ (277)    
Date Acquired 2015-07    
Stand-Alone Location Hialeah, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,492    
Acquisition Costs, Buildings and Improvements 2,344    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 681    
Gross Amount at Which Carried at Close of Period , Land 5,492    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,025    
Total 8,517    
Accumulated Depreciation $ (374)    
Date Acquired 2015-07    
Center of Osceola - Kissimmee, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,107    
Acquisition Costs, Buildings and Improvements 2,556    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7    
Gross Amount at Which Carried at Close of Period , Land 2,107    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,563    
Total 4,670    
Accumulated Depreciation $ (533)    
Date Acquired 2015-07    
Stand-Alone Location - Melbourne, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,441    
Acquisition Costs, Buildings and Improvements 1,981    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,441    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,981    
Total 4,422    
Accumulated Depreciation $ (561)    
Date Acquired 2015-07    
Lakeland Square - Lakeland, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,503    
Acquisition Costs, Buildings and Improvements 1,045    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,503    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,045    
Total 2,548    
Accumulated Depreciation $ (324)    
Date Acquired 2015-07    
Southland Mall - Miami/Cutler Rdg, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,219    
Acquisition Costs, Buildings and Improvements 1,236    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,219    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,236    
Total 6,455    
Accumulated Depreciation $ (409)    
Date Acquired 2015-07    
Aventura Mall - Miami, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 13,265    
Acquisition Costs, Buildings and Improvements 61,576    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (61,577)    
Gross Amount at Which Carried at Close of Period , Land 13,265    
Total $ 13,265    
Date Acquired 2015-07    
Stand-Alone Location - North Miami, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,748    
Acquisition Costs, Buildings and Improvements 2,434    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,748    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,434    
Total 7,182    
Accumulated Depreciation $ (473)    
Date Acquired 2015-07    
Paddock Mall - Ocala, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,468    
Acquisition Costs, Buildings and Improvements 1,150    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,468    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,150    
Total 3,618    
Accumulated Depreciation $ (370)    
Date Acquired 2015-07    
Kmart Shopping Center - Orange Park, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,477    
Acquisition Costs, Buildings and Improvements 1,701    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 443    
Gross Amount at Which Carried at Close of Period , Land 1,477    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,144    
Total 3,621    
Accumulated Depreciation $ (431)    
Date Acquired 2015-07    
University Mall - Pensacola, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,620    
Acquisition Costs, Buildings and Improvements 2,990    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,620    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,990    
Total 5,610    
Accumulated Depreciation $ (621)    
Date Acquired 2015-07    
Orlando Fashion Square - Orlando, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,403    
Acquisition Costs, Buildings and Improvements 3,626    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (3,626)    
Gross Amount at Which Carried at Close of Period , Land 4,403    
Total $ 4,403    
Date Acquired 2015-07    
Panama City Mall - Panama City, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,227    
Acquisition Costs, Buildings and Improvements 1,614    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,227    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,614    
Total 4,841    
Accumulated Depreciation $ (1,320)    
Date Acquired 2015-07    
Westfield Sarasota - Sarasota, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,920    
Acquisition Costs, Buildings and Improvements 2,200    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,920    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,200    
Total 6,120    
Accumulated Depreciation $ (545)    
Date Acquired 2015-07    
Stand-Alone Location St. Petersburg, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,653    
Acquisition Costs, Buildings and Improvements 777    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,653    
Gross Amount at Which Carried at Close of Period, Building and Improvements 777    
Total 2,430    
Accumulated Depreciation $ (361)    
Date Acquired 2015-07    
Westfield Broward - Plantation, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,933    
Acquisition Costs, Buildings and Improvements 2,509    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,933    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,509    
Total 9,442    
Accumulated Depreciation $ (713)    
Date Acquired 2015-07    
Tyrone Square Mall - St Petersburg, FL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,381    
Acquisition Costs, Buildings and Improvements 2,420    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements (2,420)    
Gross Amount at Which Carried at Close of Period , Land 2,381    
Total $ 2,381    
Date Acquired 2015-07    
Oglethorpe Mall - Savannah, Ga [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,285    
Acquisition Costs, Buildings and Improvements 3,012    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,285    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,012    
Total 8,297    
Accumulated Depreciation $ (479)    
Date Acquired 2015-07    
Stand Alone Location - Honolulu, HI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,824    
Acquisition Costs, Buildings and Improvements 2,195    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 19,207    
Gross Amount at Which Carried at Close of Period , Land 6,824    
Gross Amount at Which Carried at Close of Period, Building and Improvements 21,402    
Total 28,226    
Accumulated Depreciation $ (579)    
Date Acquired 2015-07    
Stand-Alone Location - Algona, IA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 644    
Acquisition Costs, Buildings and Improvements 2,796    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 644    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,796    
Total 3,440    
Accumulated Depreciation $ (395)    
Date Acquired 2015-07    
Stand-Alone Location - Charles City, IA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 793    
Acquisition Costs, Buildings and Improvements 1,914    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 793    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,914    
Total 2,707    
Accumulated Depreciation $ (453)    
Date Acquired 2015-07    
Boise Towne Center - Boise, ID [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,828    
Acquisition Costs, Buildings and Improvements 1,848    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,828    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,848    
Total 3,676    
Accumulated Depreciation $ (372)    
Date Acquired 2015-07    
Lindale Mall - Cedar Rapids, IA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,833    
Acquisition Costs, Buildings and Improvements 2,197    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,833    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,197    
Total 5,030    
Accumulated Depreciation $ (446)    
Date Acquired 2015-07    
Stand-Alone Location One - Chicago IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,665    
Acquisition Costs, Buildings and Improvements 3,504    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,665    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,504    
Total 7,169    
Accumulated Depreciation $ (279)    
Date Acquired 2015-07    
Stand-Alone Location Two - Chicago IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 905    
Acquisition Costs, Buildings and Improvements 804    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 905    
Gross Amount at Which Carried at Close of Period, Building and Improvements 804    
Total 1,709    
Accumulated Depreciation $ (254)    
Date Acquired 2015-07    
Webster City Plaza - Webster City, IA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 392    
Acquisition Costs, Buildings and Improvements 896    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 392    
Gross Amount at Which Carried at Close of Period, Building and Improvements 896    
Total 1,288    
Accumulated Depreciation $ (177)    
Date Acquired 2015-07    
Louis Joliet Mall - Joliet, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,557    
Acquisition Costs, Buildings and Improvements 3,108    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,557    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,108    
Total 5,665    
Accumulated Depreciation $ (886)    
Date Acquired 2015-07    
Stand-Alone Location - Lombard, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,685    
Acquisition Costs, Buildings and Improvements 8,281    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,685    
Gross Amount at Which Carried at Close of Period, Building and Improvements 8,281    
Total 10,966    
Accumulated Depreciation $ (742)    
Date Acquired 2015-07    
Kedzie Square - Chicago, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,385    
Acquisition Costs, Buildings and Improvements 7,924    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,385    
Gross Amount at Which Carried at Close of Period, Building and Improvements 7,924    
Total 10,309    
Accumulated Depreciation $ (855)    
Date Acquired 2015-07    
Stand-Alone Location - Moline, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,010    
Acquisition Costs, Buildings and Improvements 751    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 17    
Gross Amount at Which Carried at Close of Period , Land 2,010    
Gross Amount at Which Carried at Close of Period, Building and Improvements 768    
Total 2,778    
Accumulated Depreciation $ (367)    
Date Acquired 2015-07    
Homewood Square - Homewood, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,954    
Acquisition Costs, Buildings and Improvements 4,766    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 36    
Gross Amount at Which Carried at Close of Period , Land 3,954    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,802    
Total 8,756    
Accumulated Depreciation $ (868)    
Date Acquired 2015-07    
Stand-Alone Location - Steger, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 589    
Acquisition Costs, Buildings and Improvements 2,846    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 589    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,846    
Total 3,435    
Accumulated Depreciation $ (260)    
Date Acquired 2015-07    
North Riverside Park Mall - North Riverside, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,846    
Acquisition Costs, Buildings and Improvements 3,178    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,846    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,178    
Total 5,024    
Accumulated Depreciation $ (665)    
Date Acquired 2015-07    
Orland Square - Orland Park, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,783    
Acquisition Costs, Buildings and Improvements 974    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,783    
Gross Amount at Which Carried at Close of Period, Building and Improvements 974    
Total 2,757    
Accumulated Depreciation $ (372)    
Date Acquired 2015-07    
Sherwood Plaza - Springfield, IL [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,182    
Acquisition Costs, Buildings and Improvements 5,051    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,182    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,051    
Total 7,233    
Accumulated Depreciation $ (856)    
Date Acquired 2015-07    
Stand-Alone Location - Leavenworth, KS [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 397    
Acquisition Costs, Buildings and Improvements 705    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 397    
Gross Amount at Which Carried at Close of Period, Building and Improvements 705    
Total 1,102    
Accumulated Depreciation $ (273)    
Date Acquired 2015-07    
North Pointe Plaza - Elkhart, IN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,349    
Acquisition Costs, Buildings and Improvements 869    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 34    
Gross Amount at Which Carried at Close of Period , Land 1,349    
Gross Amount at Which Carried at Close of Period, Building and Improvements 903    
Total 2,252    
Accumulated Depreciation $ (213)    
Date Acquired 2015-07    
Metcalf South Shopping Center - Overland Pk, KS [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,775    
Acquisition Costs, Buildings and Improvements 1,766    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,775    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,766    
Total 4,541    
Accumulated Depreciation $ (686)    
Date Acquired 2015-07    
Glenbrook Square - Ft. Wayne, IN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,247    
Acquisition Costs, Buildings and Improvements 5,476    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,024    
Gross Amount at Which Carried at Close of Period , Land 3,247    
Gross Amount at Which Carried at Close of Period, Building and Improvements 6,500    
Total 9,747    
Accumulated Depreciation $ (863)    
Date Acquired 2015-07    
Broadway Center - Merrillville, IN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,413    
Acquisition Costs, Buildings and Improvements 3,224    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 280    
Gross Amount at Which Carried at Close of Period , Land 3,413    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,504    
Total 6,917    
Accumulated Depreciation $ (847)    
Date Acquired 2015-07    
Kentucky Oaks Mall Paducah, KY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,022    
Acquisition Costs, Buildings and Improvements 2,868    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,022    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,868    
Total 3,890    
Accumulated Depreciation $ (509)    
Date Acquired 2015-07    
Stand-Alone Location - Houma, LA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 590    
Acquisition Costs, Buildings and Improvements 2,030    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 590    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,030    
Total 2,620    
Accumulated Depreciation $ (411)    
Date Acquired 2015-07    
Pennyrile Marketplace - Hopkinsville, KY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 553    
Acquisition Costs, Buildings and Improvements 2,815    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 553    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,815    
Total 3,368    
Accumulated Depreciation $ (556)    
Date Acquired 2015-07    
Mall of Acadiana - Lafayette, LA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,406    
Acquisition Costs, Buildings and Improvements 5,094    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,406    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,094    
Total 6,500    
Accumulated Depreciation $ (875)    
Date Acquired 2015-07    
Audubon Plaza - Owensboro, KY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 411    
Acquisition Costs, Buildings and Improvements 1,083    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 411    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,083    
Total 1,494    
Accumulated Depreciation $ (180)    
Date Acquired 2015-07    
Stand-Alone Location - New Iberia, LA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 450    
Acquisition Costs, Buildings and Improvements 1,819    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 450    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,819    
Total 2,269    
Accumulated Depreciation $ (504)    
Date Acquired 2015-07    
Hunt Valley Mall - Cockeysville, MD [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,768    
Acquisition Costs, Buildings and Improvements 2,319    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,768    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,319    
Total 8,087    
Accumulated Depreciation $ (495)    
Date Acquired 2015-07    
Braintree Marketplace - Braintree, MA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,585    
Acquisition Costs, Buildings and Improvements 5,614    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 11,607    
Gross Amount at Which Carried at Close of Period , Land 6,585    
Gross Amount at Which Carried at Close of Period, Building and Improvements 17,221    
Total 23,806    
Accumulated Depreciation $ (1,165)    
Date Acquired 2015-07    
Square One Mall - Saugus, MA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,656    
Acquisition Costs, Buildings and Improvements 2,835    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,656    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,835    
Total 4,491    
Accumulated Depreciation $ (716)    
Date Acquired 2015-07    
Valley Mall - Hagerstown, MD [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,877    
Acquisition Costs, Buildings and Improvements 1,378    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 33    
Gross Amount at Which Carried at Close of Period , Land 2,877    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,411    
Total 4,288    
Accumulated Depreciation $ (516)    
Date Acquired 2015-07    
Bowie Town Center - Bowie, MD [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,583    
Acquisition Costs, Buildings and Improvements 2,335    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 492    
Gross Amount at Which Carried at Close of Period , Land 4,583    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,827    
Total 7,410    
Accumulated Depreciation $ (490)    
Date Acquired 2015-07    
Stand-Alone Location - Alpena, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 782    
Acquisition Costs, Buildings and Improvements 1,427    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 782    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,427    
Total 2,209    
Accumulated Depreciation $ (395)    
Date Acquired 2015-07    
South River Colony - Edgewater, MD [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,534    
Acquisition Costs, Buildings and Improvements 2,116    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,534    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,116    
Total 7,650    
Accumulated Depreciation $ (549)    
Date Acquired 2015-07    
Midtown Shopping Center - Madawaska, ME [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 140    
Acquisition Costs, Buildings and Improvements 942    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 140    
Gross Amount at Which Carried at Close of Period, Building and Improvements 942    
Total 1,082    
Accumulated Depreciation $ (104)    
Date Acquired 2015-07    
Macomb Mall - Roseville, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,286    
Acquisition Costs, Buildings and Improvements 4,778    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 740    
Gross Amount at Which Carried at Close of Period , Land 3,286    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,518    
Total 8,804    
Accumulated Depreciation $ (894)    
Date Acquired 2015-07    
Jackson Crossing - Jackson, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,720    
Acquisition Costs, Buildings and Improvements 1,184    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 7    
Gross Amount at Which Carried at Close of Period , Land 2,720    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,191    
Total 3,911    
Accumulated Depreciation $ (406)    
Date Acquired 2015-07    
Stand-Alone Location - Sault Ste. Marie, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 946    
Acquisition Costs, Buildings and Improvements 917    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 946    
Gross Amount at Which Carried at Close of Period, Building and Improvements 917    
Total 1,863    
Accumulated Depreciation $ (344)    
Date Acquired 2015-07    
Lincoln Park Shopping Center - Lincoln Park, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,106    
Acquisition Costs, Buildings and Improvements 3,198    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,106    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,198    
Total 4,304    
Accumulated Depreciation $ (644)    
Date Acquired 2015-07    
Stand-Alone Location - St. Clair Shores, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,399    
Acquisition Costs, Buildings and Improvements 1,797    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 15    
Gross Amount at Which Carried at Close of Period , Land 2,399    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,812    
Total 4,211    
Accumulated Depreciation $ (373)    
Date Acquired 2015-07    
Hillside Plaza - Manistee, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 508    
Acquisition Costs, Buildings and Improvements 3,045    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 508    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,045    
Total 3,553    
Accumulated Depreciation $ (608)    
Date Acquired 2015-07    
Stand-Alone Location - Ypsilanti, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,462    
Acquisition Costs, Buildings and Improvements 1,277    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,462    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,277    
Total 3,739    
Accumulated Depreciation $ (531)    
Date Acquired 2015-07    
Oakland Mall - Troy, MI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 7,954    
Acquisition Costs, Buildings and Improvements 2,651    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 4,426    
Gross Amount at Which Carried at Close of Period , Land 7,954    
Gross Amount at Which Carried at Close of Period, Building and Improvements 7,077    
Total 15,031    
Accumulated Depreciation $ (1,060)    
Date Acquired 2015-07    
Burnsville Center - Burnsville, MN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,513    
Acquisition Costs, Buildings and Improvements 1,281    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,513    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,281    
Total 4,794    
Accumulated Depreciation $ (639)    
Date Acquired 2015-07    
Stand-Alone Location - St Paul, MN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,866    
Acquisition Costs, Buildings and Improvements 1,028    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,866    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,028    
Total 2,894    
Accumulated Depreciation $ (458)    
Date Acquired 2015-07    
Detroit Lakes K Mart Plaza - Detroit Lakes, MN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,130    
Acquisition Costs, Buildings and Improvements 1,220    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,130    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,220    
Total 2,350    
Accumulated Depreciation $ (501)    
Date Acquired 2015-07    
Stand-Alone Location - Cape Girardeau, MO [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 609    
Acquisition Costs, Buildings and Improvements 908    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 609    
Gross Amount at Which Carried at Close of Period, Building and Improvements 908    
Total 1,517    
Accumulated Depreciation $ (167)    
Date Acquired 2015-07    
Maplewood Mall - Maplewood, MN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,605    
Acquisition Costs, Buildings and Improvements 1,162    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,605    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,162    
Total 4,767    
Accumulated Depreciation $ (504)    
Date Acquired 2015-07    
Stand-Alone Location - Jefferson City, MO [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 957    
Acquisition Costs, Buildings and Improvements 2,224    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 957    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,224    
Total 3,181    
Accumulated Depreciation $ (406)    
Date Acquired 2015-07    
Flower Valley Shopping Center - Florissant, MO [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,430    
Acquisition Costs, Buildings and Improvements 1,607    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,430    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,607    
Total 4,037    
Accumulated Depreciation $ (489)    
Date Acquired 2015-07    
Stand-Alone Location - Havre, MT [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 600    
Acquisition Costs, Buildings and Improvements 790    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 600    
Gross Amount at Which Carried at Close of Period, Building and Improvements 790    
Total 1,390    
Accumulated Depreciation $ (241)    
Date Acquired 2015-07    
Kickapoo Corners - Springfield, MO [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 922    
Acquisition Costs, Buildings and Improvements 2,050    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 31    
Gross Amount at Which Carried at Close of Period , Land 922    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,081    
Total 3,003    
Accumulated Depreciation $ (330)    
Date Acquired 2015-07    
Columbus Centre - Columbus, MS [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,940    
Acquisition Costs, Buildings and Improvements 2,547    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,064    
Gross Amount at Which Carried at Close of Period , Land 2,940    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,611    
Total 6,551    
Accumulated Depreciation $ (710)    
Date Acquired 2015-07    
Asheville Mall - Asheville, NC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,141    
Acquisition Costs, Buildings and Improvements 2,036    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,141    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,036    
Total 6,177    
Accumulated Depreciation $ (584)    
Date Acquired 2015-07    
Concord Plaza - Concord, NC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,325    
Acquisition Costs, Buildings and Improvements 1,275    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,325    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,275    
Total 3,600    
Accumulated Depreciation $ (578)    
Date Acquired 2015-07    
Stand-Alone Location - Kearney, NE [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 272    
Acquisition Costs, Buildings and Improvements 483    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 272    
Gross Amount at Which Carried at Close of Period, Building and Improvements 483    
Total 755    
Accumulated Depreciation $ (164)    
Date Acquired 2015-07    
Landmark Center - Greensboro, NC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,869    
Acquisition Costs, Buildings and Improvements 4,387    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 749    
Gross Amount at Which Carried at Close of Period , Land 3,869    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,136    
Total 9,005    
Accumulated Depreciation $ (806)    
Date Acquired 2015-07    
The Mall of New Hampshire - Manchester, NH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,458    
Acquisition Costs, Buildings and Improvements 4,160    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,458    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,160    
Total 5,618    
Accumulated Depreciation $ (592)    
Date Acquired 2015-07    
Kmart Shopping Center - Minot, ND [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,724    
Acquisition Costs, Buildings and Improvements 2,925    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,724    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,925    
Total 4,649    
Accumulated Depreciation $ (534)    
Date Acquired 2015-07    
The Mall at Rockingham Park - Salem, NH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,321    
Acquisition Costs, Buildings and Improvements 12,198    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,321    
Gross Amount at Which Carried at Close of Period, Building and Improvements 12,198    
Total 15,519    
Accumulated Depreciation $ (1,285)    
Date Acquired 2015-07    
Pheasant Lane Mall - Nashua, NH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,794    
Acquisition Costs, Buildings and Improvements 7,255    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,794    
Gross Amount at Which Carried at Close of Period, Building and Improvements 7,255    
Total 9,049    
Accumulated Depreciation $ (566)    
Date Acquired 2015-07    
Stand-Alone Location - Middletown, NJ [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,647    
Acquisition Costs, Buildings and Improvements 2,941    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 233    
Gross Amount at Which Carried at Close of Period , Land 5,647    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,174    
Total 8,821    
Accumulated Depreciation $ (1,323)    
Date Acquired 2015-07    
Fox Run Mall - Portsmouth, NH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,934    
Acquisition Costs, Buildings and Improvements 3,375    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,934    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,375    
Total 7,309    
Accumulated Depreciation $ (717)    
Date Acquired 2015-07    
Stand-Alone Location - Watchung, NYC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,704    
Acquisition Costs, Buildings and Improvements 4,110    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,704    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,110    
Total 10,814    
Accumulated Depreciation $ (910)    
Date Acquired 2015-07    
Stand-Alone Location - Deming, NM [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,085    
Acquisition Costs, Buildings and Improvements 1,194    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,085    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,194    
Total 2,279    
Accumulated Depreciation $ (338)    
Date Acquired 2015-07    
Stand-Alone Location - Farmington, NM [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,480    
Acquisition Costs, Buildings and Improvements 1,845    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,480    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,845    
Total 3,325    
Accumulated Depreciation $ (417)    
Date Acquired 2015-07    
Kmart Shopping Center - Hobbs, NM [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,386    
Acquisition Costs, Buildings and Improvements 2,557    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,386    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,557    
Total 3,943    
Accumulated Depreciation $ (438)    
Date Acquired 2015-07    
Eastern Commons Shopping Center - Henderson, NV [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,124    
Acquisition Costs, Buildings and Improvements 1,362    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,150    
Gross Amount at Which Carried at Close of Period , Land 3,124    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,512    
Total 6,636    
Accumulated Depreciation $ (522)    
Date Acquired 2015-07    
Meadows Mall - Las Vegas, NV [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,354    
Acquisition Costs, Buildings and Improvements 1,879    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,354    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,879    
Total 5,233    
Accumulated Depreciation $ (554)    
Date Acquired 2015-07    
Meadowood Mall - Reno, NV [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,135    
Acquisition Costs, Buildings and Improvements 5,748    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,135    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,748    
Total 7,883    
Accumulated Depreciation $ (481)    
Date Acquired 2015-07    
Stand-Alone Location - Hicksville, NYC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 38,626    
Acquisition Costs, Buildings and Improvements 19,065    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 9    
Gross Amount at Which Carried at Close of Period , Land 38,626    
Gross Amount at Which Carried at Close of Period, Building and Improvements 19,074    
Total 57,700    
Accumulated Depreciation $ (2,596)    
Date Acquired 2015-07    
Colonie Center - Albany, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 8,289    
Acquisition Costs, Buildings and Improvements 6,523    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 8,289    
Gross Amount at Which Carried at Close of Period, Building and Improvements 6,523    
Total 14,812    
Accumulated Depreciation $ (1,191)    
Date Acquired 2015-07    
Great Northern Mall - Clay, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 787    
Acquisition Costs, Buildings and Improvements 4,134    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 787    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,134    
Total 4,921    
Accumulated Depreciation $ (619)    
Date Acquired 2015-07    
Stand-Alone Location - Olean, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 249    
Acquisition Costs, Buildings and Improvements 2,124    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 249    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,124    
Total 2,373    
Accumulated Depreciation $ (407)    
Date Acquired 2015-07    
Huntington Square Mall - East Northport, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 7,617    
Acquisition Costs, Buildings and Improvements 2,065    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 7,617    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,065    
Total 9,682    
Accumulated Depreciation $ (632)    
Date Acquired 2015-07    
Greece Ridge Center - Rochester-Greece, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,082    
Acquisition Costs, Buildings and Improvements 1,560    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,082    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,560    
Total 4,642    
Accumulated Depreciation $ (515)    
Date Acquired 2015-07    
Oakdale Mall - Johnson City, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,169    
Acquisition Costs, Buildings and Improvements 934    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,169    
Gross Amount at Which Carried at Close of Period, Building and Improvements 934    
Total 3,103    
Accumulated Depreciation $ (307)    
Date Acquired 2015-07    
Eastview Mal - Victor, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,144    
Acquisition Costs, Buildings and Improvements 1,391    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,144    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,391    
Total 5,535    
Accumulated Depreciation $ (538)    
Date Acquired 2015-07    
Jefferson Valley Mall - Yorktown Hts, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,584    
Acquisition Costs, Buildings and Improvements 1,569    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,584    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,569    
Total 5,153    
Accumulated Depreciation $ (573)    
Date Acquired 2015-07    
Westfield Belden Village - Canton, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,650    
Acquisition Costs, Buildings and Improvements 5,854    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,650    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,854    
Total 7,504    
Accumulated Depreciation $ (1,075)    
Date Acquired 2015-07    
Sidney Plaza - Sidney, NY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,942    
Acquisition Costs, Buildings and Improvements 1,769    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,942    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,769    
Total 3,711    
Accumulated Depreciation $ (836)    
Date Acquired 2015-07    
Chapel Hill Mall - Chapel Hill, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 444    
Acquisition Costs, Buildings and Improvements 1,460    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 444    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,460    
Total 1,904    
Accumulated Depreciation $ (777)    
Date Acquired 2015-07    
Dayton Mall - Dayton Mall, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,650    
Acquisition Costs, Buildings and Improvements 1,223    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,650    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,223    
Total 3,873    
Accumulated Depreciation $ (528)    
Date Acquired 2015-07    
Stand-Alone Location - Kenton, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 340    
Acquisition Costs, Buildings and Improvements 417    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 340    
Gross Amount at Which Carried at Close of Period, Building and Improvements 417    
Total 757    
Accumulated Depreciation $ (273)    
Date Acquired 2015-07    
Stand-Alone Location - Marietta, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 598    
Acquisition Costs, Buildings and Improvements 706    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 598    
Gross Amount at Which Carried at Close of Period, Building and Improvements 706    
Total 1,304    
Accumulated Depreciation $ (225)    
Date Acquired 2015-07    
Stand-Alone Location - Tallmadge, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 870    
Acquisition Costs, Buildings and Improvements 682    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 870    
Gross Amount at Which Carried at Close of Period, Building and Improvements 682    
Total 1,552    
Accumulated Depreciation $ (296)    
Date Acquired 2015-07    
Great Lakes Mall - Mentor, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,092    
Acquisition Costs, Buildings and Improvements 1,776    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,092    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,776    
Total 2,868    
Accumulated Depreciation $ (572)    
Date Acquired 2015-07    
Southland Shopping Center - Middleburg Heights, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 698    
Acquisition Costs, Buildings and Improvements 1,547    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 698    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,547    
Total 2,245    
Accumulated Depreciation $ (374)    
Date Acquired 2015-07    
Stand-Alone Location - Muskogee, OK [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 647    
Acquisition Costs, Buildings and Improvements 966    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 647    
Gross Amount at Which Carried at Close of Period, Building and Improvements 966    
Total 1,613    
Accumulated Depreciation $ (361)    
Date Acquired 2015-07    
Kmart Plaza - North Canton, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,044    
Acquisition Costs, Buildings and Improvements 1,126    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,044    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,126    
Total 2,170    
Accumulated Depreciation $ (324)    
Date Acquired 2015-07    
Stand-Alone Location - Okla City/Sequoyah, OK [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,542    
Acquisition Costs, Buildings and Improvements 2,210    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,542    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,210    
Total 3,752    
Accumulated Depreciation $ (1,017)    
Date Acquired 2015-07    
Stand-Alone Location - Tulsa, OK [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,048    
Acquisition Costs, Buildings and Improvements 5,386    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1,711    
Gross Amount at Which Carried at Close of Period , Land 2,048    
Gross Amount at Which Carried at Close of Period, Building and Improvements 7,097    
Total 9,145    
Accumulated Depreciation $ (921)    
Date Acquired 2015-07    
Westgate Village Shopping Center - Toledo, OH [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,664    
Acquisition Costs, Buildings and Improvements 1,289    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,664    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,289    
Total 2,953    
Accumulated Depreciation $ (378)    
Date Acquired 2015-07    
Stand-Alone Location - The Dalles, OR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 616    
Acquisition Costs, Buildings and Improvements 775    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 616    
Gross Amount at Which Carried at Close of Period, Building and Improvements 775    
Total 1,391    
Accumulated Depreciation $ (256)    
Date Acquired 2015-07    
Clackamas Town Center - Happy Valley, OR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,659    
Acquisition Costs, Buildings and Improvements 1,271    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,659    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,271    
Total 7,930    
Accumulated Depreciation $ (270)    
Date Acquired 2015-07    
Walnut Bottom Towne Centre - Carlisle, PA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,103    
Acquisition Costs, Buildings and Improvements 1,725    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,103    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,725    
Total 2,828    
Accumulated Depreciation $ (130)    
Date Acquired 2015-07    
Shops at Prospect - Columbia, PA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 897    
Acquisition Costs, Buildings and Improvements 2,202    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6    
Gross Amount at Which Carried at Close of Period , Land 897    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,208    
Total 3,105    
Accumulated Depreciation $ (342)    
Date Acquired 2015-07    
Stand-Alone Location - Walnutport, PA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 885    
Acquisition Costs, Buildings and Improvements 3,452    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 885    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,452    
Total 4,337    
Accumulated Depreciation $ (756)    
Date Acquired 2015-07    
King of Prussia - King Of Prussia, PA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Buildings and Improvements $ 42,300    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,705    
Gross Amount at Which Carried at Close of Period, Building and Improvements 45,005    
Total 45,005    
Accumulated Depreciation $ (3,264)    
Date Acquired 2015-07    
Kmart And Lowes Shopping Center - Lebanon, PA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,333    
Acquisition Costs, Buildings and Improvements 2,085    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,333    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,085    
Total 3,418    
Accumulated Depreciation $ (743)    
Date Acquired 2015-07    
Countryside Shopping Center - Mount Pleasant, PA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 970    
Acquisition Costs, Buildings and Improvements 1,520    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 970    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,520    
Total 2,490    
Accumulated Depreciation $ (474)    
Date Acquired 2015-07    
Caguas Mall - Caguas, PR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 431    
Acquisition Costs, Buildings and Improvements 9,362    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 431    
Gross Amount at Which Carried at Close of Period, Building and Improvements 9,362    
Total 9,793    
Accumulated Depreciation $ (902)    
Date Acquired 2015-07    
Plaza Carolina Mall - Carolina, PR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 611    
Acquisition Costs, Buildings and Improvements 8,640    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 611    
Gross Amount at Which Carried at Close of Period, Building and Improvements 8,640    
Total 9,251    
Accumulated Depreciation $ (981)    
Date Acquired 2015-07    
Haines Acres Shopping Center -York, PA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,096    
Acquisition Costs, Buildings and Improvements 1,414    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3    
Gross Amount at Which Carried at Close of Period , Land 1,096    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,417    
Total 2,513    
Accumulated Depreciation $ (302)    
Date Acquired 2015-07    
Rexville Bayamon Towne Center - Bayamon, PR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 656    
Acquisition Costs, Buildings and Improvements 7,173    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 1    
Gross Amount at Which Carried at Close of Period , Land 656    
Gross Amount at Which Carried at Close of Period, Building and Improvements 7,174    
Total 7,830    
Accumulated Depreciation $ (731)    
Date Acquired 2015-07    
Plaza Guaynabo Guaynabo PR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,603    
Acquisition Costs, Buildings and Improvements 26,695    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 123    
Gross Amount at Which Carried at Close of Period , Land 1,603    
Gross Amount at Which Carried at Close of Period, Building and Improvements 26,818    
Total 28,421    
Accumulated Depreciation $ (2,362)    
Date Acquired 2015-07    
Western Plaza - Mayaguez, PR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 564    
Acquisition Costs, Buildings and Improvements 4,555    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 564    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,555    
Total 5,119    
Accumulated Depreciation $ (647)    
Date Acquired 2015-07    
Ponce Towne Center - Ponce, PR [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 473    
Acquisition Costs, Buildings and Improvements 3,965    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 473    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,965    
Total 4,438    
Accumulated Depreciation $ (533)    
Date Acquired 2015-07    
Rhode Island Mall - Warwick, RI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 9,166    
Acquisition Costs, Buildings and Improvements 3,388    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 9,166    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,388    
Total 12,554    
Accumulated Depreciation $ (927)    
Date Acquired 2015-07    
Stand-Alone Location - Sioux Falls, SD [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,025    
Acquisition Costs, Buildings and Improvements 1,783    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,025    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,783    
Total 2,808    
Accumulated Depreciation $ (260)    
Date Acquired 2015-07    
Boulevard Market Fair - Anderson, SC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,297    
Acquisition Costs, Buildings and Improvements 638    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 5,357    
Gross Amount at Which Carried at Close of Period , Land 1,297    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,995    
Total 7,292    
Accumulated Depreciation $ (289)    
Date Acquired 2015-07    
Northwoods Mall - Charleston, SC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,576    
Acquisition Costs, Buildings and Improvements 1,497    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,576    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,497    
Total 5,073    
Accumulated Depreciation $ (479)    
Date Acquired 2015-07    
Stand-Alone Location - Memphis/Poplar, TN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,827    
Acquisition Costs, Buildings and Improvements 2,475    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 15,581    
Gross Amount at Which Carried at Close of Period , Land 2,827    
Gross Amount at Which Carried at Close of Period, Building and Improvements 18,056    
Total 20,883    
Accumulated Depreciation $ (45)    
Date Acquired 2015-07    
Kmart Plaza - Rock Hill, SC [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,432    
Acquisition Costs, Buildings and Improvements 1,079    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,432    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,079    
Total 2,511    
Accumulated Depreciation $ (391)    
Date Acquired 2015-07    
Wolfchase Galleria - Cordova, TN [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,581    
Acquisition Costs, Buildings and Improvements 4,279    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,581    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,279    
Total 6,860    
Accumulated Depreciation $ (578)    
Date Acquired 2015-07    
Stand-Alone Location - El Paso, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,008    
Acquisition Costs, Buildings and Improvements 1,778    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,008    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,778    
Total 3,786    
Accumulated Depreciation $ (415)    
Date Acquired 2015-07    
Tech Ridge - Austin, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,164    
Acquisition Costs, Buildings and Improvements 2,858    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,164    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,858    
Total 6,022    
Accumulated Depreciation $ (778)    
Date Acquired 2015-07    
Southwest Center Mall - Dallas, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,154    
Acquisition Costs, Buildings and Improvements 1,314    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,154    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,314    
Total 2,468    
Accumulated Depreciation $ (475)    
Date Acquired 2015-07    
Memorial City SC - Memorial, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 7,967    
Acquisition Costs, Buildings and Improvements 4,625    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 7,967    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,625    
Total 12,592    
Accumulated Depreciation $ (1,062)    
Date Acquired 2015-07    
Stand-Alone Location - Houston, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,110    
Acquisition Costs, Buildings and Improvements 1,525    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,110    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,525    
Total 7,635    
Accumulated Depreciation $ (415)    
Date Acquired 2015-07    
Baybrook Mall - Friendswood, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 6,124    
Acquisition Costs, Buildings and Improvements 2,038    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 6,124    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,038    
Total 8,162    
Accumulated Depreciation $ (530)    
Date Acquired 2015-07    
Ingram Park Mall - Ingram, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,651    
Acquisition Costs, Buildings and Improvements 2,560    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,651    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,560    
Total 7,211    
Accumulated Depreciation $ (513)    
Date Acquired 2015-07    
Kmart Plaza - Harlingen, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,795    
Acquisition Costs, Buildings and Improvements 1,183    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,795    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,183    
Total 2,978    
Accumulated Depreciation $ (207)    
Date Acquired 2015-07    
Irving Mall - Irving, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,493    
Acquisition Costs, Buildings and Improvements 5,743    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,493    
Gross Amount at Which Carried at Close of Period, Building and Improvements 5,743    
Total 10,236    
Accumulated Depreciation $ (942)    
Date Acquired 2015-07    
Stand-Alone Location - Central Park, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,468    
Acquisition Costs, Buildings and Improvements 1,457    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 2,840    
Gross Amount at Which Carried at Close of Period , Land 5,468    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,297    
Total 9,765    
Accumulated Depreciation $ (458)    
Date Acquired 2015-07    
Stand-Alone Location - Shepherd, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,457    
Acquisition Costs, Buildings and Improvements 2,081    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,457    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,081    
Total 7,538    
Accumulated Depreciation $ (468)    
Date Acquired 2015-07    
Stand-Alone Location - Westwood, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,899    
Acquisition Costs, Buildings and Improvements 1,748    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,899    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,748    
Total 4,647    
Accumulated Depreciation $ (598)    
Date Acquired 2015-07    
Valley View Center - Valley View, TX [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,706    
Acquisition Costs, Buildings and Improvements 3,230    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,706    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,230    
Total 7,936    
Accumulated Depreciation $ (984)    
Date Acquired 2015-07    
Antelope Square - Layton, UT [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,234    
Acquisition Costs, Buildings and Improvements 974    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 3,477    
Gross Amount at Which Carried at Close of Period , Land 2,234    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,451    
Total 6,685    
Accumulated Depreciation $ (590)    
Date Acquired 2015-07    
Jordan Landing Shopping Center - West Jordan, UT [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,190    
Acquisition Costs, Buildings and Improvements 2,305    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 6,014    
Gross Amount at Which Carried at Close of Period , Land 3,190    
Gross Amount at Which Carried at Close of Period, Building and Improvements 8,319    
Total 11,509    
Accumulated Depreciation $ (520)    
Date Acquired 2015-07    
Landmark Mall - Alexandria, VA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,728    
Acquisition Costs, Buildings and Improvements 3,294    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,728    
Gross Amount at Which Carried at Close of Period, Building and Improvements 3,294    
Total 7,022    
Accumulated Depreciation $ (870)    
Date Acquired 2015-07    
Greenbrier Mall - Chesapeake, VA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 4,236    
Acquisition Costs, Buildings and Improvements 1,700    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 4,236    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,700    
Total 5,936    
Accumulated Depreciation $ (527)    
Date Acquired 2015-07    
Fair Oaks Mall - Fairfax, VA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 10,873    
Acquisition Costs, Buildings and Improvements 1,491    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 10,873    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,491    
Total 12,364    
Accumulated Depreciation $ (440)    
Date Acquired 2015-07    
Newmarket Fair Mall - Hampton, VA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 771    
Acquisition Costs, Buildings and Improvements 1,011    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 771    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,011    
Total 1,782    
Accumulated Depreciation $ (470)    
Date Acquired 2015-07    
Overlake Plaza - Redmond-Overlake Pk, WA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 5,133    
Acquisition Costs, Buildings and Improvements 4,133    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 5,133    
Gross Amount at Which Carried at Close of Period, Building and Improvements 4,133    
Total 9,266    
Accumulated Depreciation $ (849)    
Date Acquired 2015-07    
Pembroke Mall - Virginia Beach, VA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 10,414    
Acquisition Costs, Buildings and Improvements 4,760    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 13,034    
Gross Amount at Which Carried at Close of Period , Land 10,414    
Gross Amount at Which Carried at Close of Period, Building and Improvements 17,794    
Total 28,208    
Accumulated Depreciation $ (1,581)    
Date Acquired 2015-07    
Warrenton Village - Warrenton, VA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,956    
Acquisition Costs, Buildings and Improvements 2,480    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,956    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,480    
Total 4,436    
Accumulated Depreciation $ (396)    
Date Acquired 2015-07    
Stand-Alone Location - Yakima, WA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 1,863    
Acquisition Costs, Buildings and Improvements 2,856    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 1,863    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,856    
Total 4,719    
Accumulated Depreciation $ (743)    
Date Acquired 2015-07    
Westfield Vancouver - Vancouver, WA [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,378    
Acquisition Costs, Buildings and Improvements 1,136    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,378    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,136    
Total 4,514    
Accumulated Depreciation $ (433)    
Date Acquired 2015-07    
Stand-Alone Location - Platteville, WI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 748    
Acquisition Costs, Buildings and Improvements 1,195    
Costs Capitalized Subsequent to Acquisition, Land 0    
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements 35    
Gross Amount at Which Carried at Close of Period , Land 748    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,230    
Total 1,978    
Accumulated Depreciation $ (346)    
Date Acquired 2015-07    
Southridge Mall [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,208    
Acquisition Costs, Buildings and Improvements 2,340    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,208    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,340    
Total 5,548    
Accumulated Depreciation $ (981)    
Date Acquired 2015-07    
Stand-Alone Location - Charleston, WV [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 2,030    
Acquisition Costs, Buildings and Improvements 797    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 2,030    
Gross Amount at Which Carried at Close of Period, Building and Improvements 797    
Total 2,827    
Accumulated Depreciation $ (371)    
Date Acquired 2015-07    
West Towne Mall - Madison, WI [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 3,053    
Acquisition Costs, Buildings and Improvements 2,130    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 3,053    
Gross Amount at Which Carried at Close of Period, Building and Improvements 2,130    
Total 5,183    
Accumulated Depreciation $ (909)    
Date Acquired 2015-07    
Stand-Alone Location - Scott Depot, WV [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 987    
Acquisition Costs, Buildings and Improvements 484    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 987    
Gross Amount at Which Carried at Close of Period, Building and Improvements 484    
Total 1,471    
Accumulated Depreciation $ (199)    
Date Acquired 2015-07    
Valley Point - Elkins, WV [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 788    
Acquisition Costs, Buildings and Improvements 1,147    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 788    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,147    
Total 1,935    
Accumulated Depreciation $ (319)    
Date Acquired 2015-07    
Stand-Alone Location - Gillette, WY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 846    
Acquisition Costs, Buildings and Improvements 876    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 846    
Gross Amount at Which Carried at Close of Period, Building and Improvements 876    
Total 1,722    
Accumulated Depreciation $ (337)    
Date Acquired 2015-07    
Stand-Alone Location - Riverton, WY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 561    
Acquisition Costs, Buildings and Improvements 847    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 561    
Gross Amount at Which Carried at Close of Period, Building and Improvements 847    
Total 1,408    
Accumulated Depreciation $ (310)    
Date Acquired 2015-07    
Mountain Plaza - Casper, WY [Member]      
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]      
Acquisition Costs, Land $ 509    
Acquisition Costs, Buildings and Improvements 1,303    
Costs Capitalized Subsequent to Acquisition, Land 0    
Gross Amount at Which Carried at Close of Period , Land 509    
Gross Amount at Which Carried at Close of Period, Building and Improvements 1,303    
Total 1,812    
Accumulated Depreciation $ (307)    
Date Acquired 2015-07