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Schedule III Real Estate and Accumulated Depreciation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Real Estate And Accumulated Depreciation [Line Items]        
Location Total Real Estate Assets, net of Real Estate Joint Venture      
Encumbrances $ 6,588      
Initial Cost Land 1,960,547      
Initial Cost Buildings and Fixtures 10,112,798      
Gross Amount, Land 1,990,174      
Gross Amount, Buildings and Fixtures 12,348,721      
Total 14,338,895 $ 13,898,707 $ 13,656,807 $ 13,292,039
Accumulated Depreciation (3,415,105) $ (2,955,253) $ (2,549,287) $ (2,075,071)
Net 10,923,790      
Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 29,627      
Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 2,235,923      
Total Residential Properties        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances 6,588      
Initial Cost Land 1,820,908      
Initial Cost Buildings and Fixtures 9,941,939      
Gross Amount, Land 1,826,125      
Gross Amount, Buildings and Fixtures 11,823,840      
Total 13,649,965      
Accumulated Depreciation (3,360,649)      
Net 10,289,316      
Total Residential Properties | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 5,217      
Total Residential Properties | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 1,881,901      
Total Properties In Predevelopment        
Real Estate And Accumulated Depreciation [Line Items]        
Gross Amount, Land 12,572      
Gross Amount, Buildings and Fixtures 2,396      
Total 14,968      
Accumulated Depreciation (58)      
Net 14,910      
Total Properties In Predevelopment | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 12,572      
Total Properties In Predevelopment | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,396      
Wholly Owned Properties - Residential | Birchall At Ross Bridge        
Real Estate And Accumulated Depreciation [Line Items]        
Location Birmingham, AL      
Initial Cost Land $ 2,640      
Initial Cost Buildings and Fixtures 28,842      
Gross Amount, Land 2,640      
Gross Amount, Buildings and Fixtures 31,562      
Total 34,202      
Accumulated Depreciation (10,147)      
Net $ 24,055      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Birchall At Ross Bridge | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,720      
Wholly Owned Properties - Residential | Colonial Grand At Riverchase Trails        
Real Estate And Accumulated Depreciation [Line Items]        
Location Birmingham, AL      
Initial Cost Land $ 3,761      
Initial Cost Buildings and Fixtures 22,079      
Gross Amount, Land 3,761      
Gross Amount, Buildings and Fixtures 27,670      
Total 31,431      
Accumulated Depreciation (9,480)      
Net $ 21,951      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Riverchase Trails | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,591      
Wholly Owned Properties - Residential | Colonial Village At Trussville        
Real Estate And Accumulated Depreciation [Line Items]        
Location Birmingham, AL      
Initial Cost Land $ 3,402      
Initial Cost Buildings and Fixtures 31,813      
Gross Amount, Land 3,402      
Gross Amount, Buildings and Fixtures 35,684      
Total 39,086      
Accumulated Depreciation (11,493)      
Net $ 27,593      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Trussville | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
Wholly Owned Properties - Residential | Colonial Village At Trussville | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
Wholly Owned Properties - Residential | Colonial Village At Trussville | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,871      
Wholly Owned Properties - Residential | Eagle Ridge        
Real Estate And Accumulated Depreciation [Line Items]        
Location Birmingham, AL      
Initial Cost Land $ 851      
Initial Cost Buildings and Fixtures 7,667      
Gross Amount, Land 851      
Gross Amount, Buildings and Fixtures 12,140      
Total 12,991      
Accumulated Depreciation (8,352)      
Net $ 4,639      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Eagle Ridge | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,473      
Wholly Owned Properties - Residential | Colonial Grand At Traditions        
Real Estate And Accumulated Depreciation [Line Items]        
Location Gulf Shores, AL      
Initial Cost Land $ 3,211      
Initial Cost Buildings and Fixtures 25,162      
Gross Amount, Land 3,211      
Gross Amount, Buildings and Fixtures 28,896      
Total 32,107      
Accumulated Depreciation (9,766)      
Net $ 22,341      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Traditions | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,734      
Wholly Owned Properties - Residential | Colonial Grand At Edgewater        
Real Estate And Accumulated Depreciation [Line Items]        
Location Huntsville, AL      
Initial Cost Land $ 4,943      
Initial Cost Buildings and Fixtures 38,673      
Gross Amount, Land 4,943      
Gross Amount, Buildings and Fixtures 46,319      
Total 51,262      
Accumulated Depreciation (13,207)      
Net $ 38,055      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1990      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Edgewater | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,646      
Wholly Owned Properties - Residential | Paddock Clubat Providence        
Real Estate And Accumulated Depreciation [Line Items]        
Location Huntsville, AL      
Initial Cost Land $ 909      
Initial Cost Buildings and Fixtures 10,152      
Gross Amount, Land 1,739      
Gross Amount, Buildings and Fixtures 24,571      
Total 26,310      
Accumulated Depreciation (15,550)      
Net $ 10,760      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1993      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Paddock Clubat Providence | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 830      
Wholly Owned Properties - Residential | Paddock Clubat Providence | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 14,419      
Wholly Owned Properties - Residential | Colonial Grand At Madison        
Real Estate And Accumulated Depreciation [Line Items]        
Location Madison, AL      
Initial Cost Land $ 3,601      
Initial Cost Buildings and Fixtures 28,934      
Gross Amount, Land 3,601      
Gross Amount, Buildings and Fixtures 31,041      
Total 34,642      
Accumulated Depreciation (10,251)      
Net $ 24,391      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Madison | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,107      
Wholly Owned Properties - Residential | Cypress Village        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orange Beach, AL      
Initial Cost Land $ 1,290      
Initial Cost Buildings and Fixtures 12,238      
Gross Amount, Land 1,290      
Gross Amount, Buildings and Fixtures 14,674      
Total 15,964      
Accumulated Depreciation (4,390)      
Net $ 11,574      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Cypress Village | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,436      
Wholly Owned Properties - Residential | Colonial Grand At Liberty Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Vestavia Hills, AL      
Initial Cost Land $ 3,922      
Initial Cost Buildings and Fixtures 30,977      
Gross Amount, Land 3,922      
Gross Amount, Buildings and Fixtures 37,998      
Total 41,920      
Accumulated Depreciation (12,569)      
Net $ 29,351      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Liberty Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,021      
Wholly Owned Properties - Residential | Sky View Ranch        
Real Estate And Accumulated Depreciation [Line Items]        
Location Gilbert, AZ      
Initial Cost Land $ 2,668      
Initial Cost Buildings and Fixtures 14,577      
Gross Amount, Land 2,668      
Gross Amount, Buildings and Fixtures 17,524      
Total 20,192      
Accumulated Depreciation (7,180)      
Net $ 13,012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2009      
Wholly Owned Properties - Residential | Sky View Ranch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,947      
Wholly Owned Properties - Residential | Colonial Grand At Inverness Commons        
Real Estate And Accumulated Depreciation [Line Items]        
Location Mesa, AZ      
Initial Cost Land $ 4,219      
Initial Cost Buildings and Fixtures 26,255      
Gross Amount, Land 4,219      
Gross Amount, Buildings and Fixtures 29,667      
Total 33,886      
Accumulated Depreciation (8,961)      
Net $ 24,925      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Inverness Commons | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,412      
Wholly Owned Properties - Residential | Edge At Lyons Gate        
Real Estate And Accumulated Depreciation [Line Items]        
Location Phoenix, AZ      
Initial Cost Land $ 7,901      
Initial Cost Buildings and Fixtures 27,182      
Gross Amount, Land 7,901      
Gross Amount, Buildings and Fixtures 30,231      
Total 38,132      
Accumulated Depreciation (13,033)      
Net $ 25,099      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2008      
Wholly Owned Properties - Residential | Edge At Lyons Gate | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,049      
Wholly Owned Properties - Residential | Residencesat Fountainhead        
Real Estate And Accumulated Depreciation [Line Items]        
Location Phoenix, AZ      
Initial Cost Land $ 12,212      
Initial Cost Buildings and Fixtures 56,705      
Gross Amount, Land 12,212      
Gross Amount, Buildings and Fixtures 58,754      
Total 70,966      
Accumulated Depreciation (8,281)      
Net $ 62,685      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Residencesat Fountainhead | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,049      
Wholly Owned Properties - Residential | Talus Ranch        
Real Estate And Accumulated Depreciation [Line Items]        
Location Phoenix, AZ      
Initial Cost Land $ 12,741      
Initial Cost Buildings and Fixtures 47,701      
Gross Amount, Land 12,741      
Gross Amount, Buildings and Fixtures 52,824      
Total 65,565      
Accumulated Depreciation (24,977)      
Net $ 40,588      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2006      
Wholly Owned Properties - Residential | Talus Ranch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,123      
Wholly Owned Properties - Residential | Colonial Grandat Old Town Scottsdale        
Real Estate And Accumulated Depreciation [Line Items]        
Location Scottsdale, AZ      
Initial Cost Land $ 7,820      
Initial Cost Buildings and Fixtures 51,627      
Gross Amount, Land 7,820      
Gross Amount, Buildings and Fixtures 57,391      
Total 65,211      
Accumulated Depreciation (17,704)      
Net $ 47,507      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grandat Old Town Scottsdale | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
Wholly Owned Properties - Residential | Colonial Grandat Old Town Scottsdale | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1995      
Wholly Owned Properties - Residential | Colonial Grandat Old Town Scottsdale | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,764      
Wholly Owned Properties - Residential | Colonial Grand At Scottsdale        
Real Estate And Accumulated Depreciation [Line Items]        
Location Scottsdale, AZ      
Initial Cost Land $ 3,612      
Initial Cost Buildings and Fixtures 20,273      
Gross Amount, Land 3,612      
Gross Amount, Buildings and Fixtures 22,997      
Total 26,609      
Accumulated Depreciation (7,312)      
Net $ 19,297      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Scottsdale | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
Wholly Owned Properties - Residential | Colonial Grand At Scottsdale | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,724      
Wholly Owned Properties - Residential | Sky Song        
Real Estate And Accumulated Depreciation [Line Items]        
Location Scottsdale, AZ      
Initial Cost Buildings and Fixtures $ 55,748      
Gross Amount, Buildings and Fixtures 58,633      
Total 58,633      
Accumulated Depreciation (8,802)      
Net $ 49,831      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2014      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | Sky Song | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,885      
Wholly Owned Properties - Residential | Post River North [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Denver, CO      
Initial Cost Land $ 14,500      
Initial Cost Buildings and Fixtures 28,900      
Gross Amount, Land 14,500      
Gross Amount, Buildings and Fixtures 69,524      
Total 84,024      
Accumulated Depreciation (7,424)      
Net $ 76,600      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2018      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post River North [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 40,624      
Wholly Owned Properties - Residential | Sync36 I        
Real Estate And Accumulated Depreciation [Line Items]        
Location Denver, CO      
Initial Cost Land $ 18,887      
Initial Cost Buildings and Fixtures 81,317      
Gross Amount, Land 19,021      
Gross Amount, Buildings and Fixtures 86,601      
Total 105,622      
Accumulated Depreciation (6,805)      
Net $ 98,817      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2018      
Wholly Owned Properties - Residential | Sync36 I | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 134      
Wholly Owned Properties - Residential | Sync36 I | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,284      
Wholly Owned Properties - Residential | Sync36 I I        
Real Estate And Accumulated Depreciation [Line Items]        
Location Denver, CO      
Initial Cost Land $ 5,090      
Gross Amount, Land 5,090      
Gross Amount, Buildings and Fixtures 16,828      
Total 21,918      
Accumulated Depreciation (1,145)      
Net $ 20,773      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2019      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2018      
Wholly Owned Properties - Residential | Sync36 I I | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 16,828      
Wholly Owned Properties - Residential | Tiffany Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location Altamonte Springs, FL      
Initial Cost Land $ 1,024      
Initial Cost Buildings and Fixtures 9,219      
Gross Amount, Land 1,024      
Gross Amount, Buildings and Fixtures 14,663      
Total 15,687      
Accumulated Depreciation (10,831)      
Net $ 4,856      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1996      
Wholly Owned Properties - Residential | Tiffany Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,444      
Wholly Owned Properties - Residential | Colonial Grand At Lakewood Ranch        
Real Estate And Accumulated Depreciation [Line Items]        
Location Bradenton, FL      
Initial Cost Land $ 2,980      
Initial Cost Buildings and Fixtures 40,230      
Gross Amount, Land 2,980      
Gross Amount, Buildings and Fixtures 45,592      
Total 48,572      
Accumulated Depreciation (13,905)      
Net $ 34,667      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Lakewood Ranch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,362      
Wholly Owned Properties - Residential | Indigo Point        
Real Estate And Accumulated Depreciation [Line Items]        
Location Brandon, FL      
Initial Cost Land $ 1,167      
Initial Cost Buildings and Fixtures 10,500      
Gross Amount, Land 1,167      
Gross Amount, Buildings and Fixtures 14,405      
Total 15,572      
Accumulated Depreciation (9,584)      
Net $ 5,988      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1989      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2000      
Wholly Owned Properties - Residential | Indigo Point | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,905      
Wholly Owned Properties - Residential | Paddock Club Brandon        
Real Estate And Accumulated Depreciation [Line Items]        
Location Brandon, FL      
Initial Cost Land $ 2,896      
Initial Cost Buildings and Fixtures 26,111      
Gross Amount, Land 2,896      
Gross Amount, Buildings and Fixtures 33,050      
Total 35,946      
Accumulated Depreciation (22,893)      
Net $ 13,053      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Paddock Club Brandon | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,939      
Wholly Owned Properties - Residential | Preserve At Coral Square        
Real Estate And Accumulated Depreciation [Line Items]        
Location Coral Springs, FL      
Initial Cost Land $ 9,600      
Initial Cost Buildings and Fixtures 40,004      
Gross Amount, Land 9,600      
Gross Amount, Buildings and Fixtures 53,366      
Total 62,966      
Accumulated Depreciation (28,019)      
Net $ 34,947      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2004      
Wholly Owned Properties - Residential | Preserve At Coral Square | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 13,362      
Wholly Owned Properties - Residential | Paddock Club Gainesville        
Real Estate And Accumulated Depreciation [Line Items]        
Location Gainesville, FL      
Initial Cost Land $ 1,800      
Initial Cost Buildings and Fixtures 15,879      
Gross Amount, Land 1,800      
Gross Amount, Buildings and Fixtures 20,785      
Total 22,585      
Accumulated Depreciation (11,415)      
Net $ 11,170      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Paddock Club Gainesville | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,906      
Wholly Owned Properties - Residential | Retreat At Magnolia Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Gainesville, FL      
Initial Cost Land $ 2,040      
Initial Cost Buildings and Fixtures 16,338      
Gross Amount, Land 2,040      
Gross Amount, Buildings and Fixtures 17,696      
Total 19,736      
Accumulated Depreciation (5,871)      
Net $ 13,865      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Retreat At Magnolia Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,358      
Wholly Owned Properties - Residential | Colonial Grand At Heathrow        
Real Estate And Accumulated Depreciation [Line Items]        
Location Heathrow, FL      
Initial Cost Land $ 4,101      
Initial Cost Buildings and Fixtures 35,684      
Gross Amount, Land 4,101      
Gross Amount, Buildings and Fixtures 40,159      
Total 44,260      
Accumulated Depreciation (12,877)      
Net $ 31,383      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Heathrow | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,475      
Wholly Owned Properties - Residential | A220 Riverside        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 2,381      
Initial Cost Buildings and Fixtures 35,514      
Gross Amount, Land 2,381      
Gross Amount, Buildings and Fixtures 43,851      
Total 46,232      
Accumulated Depreciation (5,915)      
Net $ 40,317      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Wholly Owned Properties - Residential | A220 Riverside | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,337      
Wholly Owned Properties - Residential | Atlantic Crossing        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 4,000      
Initial Cost Buildings and Fixtures 19,495      
Gross Amount, Land 4,000      
Gross Amount, Buildings and Fixtures 21,863      
Total 25,863      
Accumulated Depreciation (7,382)      
Net $ 18,481      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Atlantic Crossing | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,368      
Wholly Owned Properties - Residential | Coopers Hawk        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 854      
Initial Cost Buildings and Fixtures 7,500      
Gross Amount, Land 854      
Gross Amount, Buildings and Fixtures 11,242      
Total 12,096      
Accumulated Depreciation (8,695)      
Net $ 3,401      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Coopers Hawk | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,742      
Wholly Owned Properties - Residential | Hunters Ridge At Deerwood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 1,533      
Initial Cost Buildings and Fixtures 13,835      
Gross Amount, Land 1,533      
Gross Amount, Buildings and Fixtures 19,084      
Total 20,617      
Accumulated Depreciation (13,650)      
Net $ 6,967      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Hunters Ridge At Deerwood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,249      
Wholly Owned Properties - Residential | Lakeside        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 1,430      
Initial Cost Buildings and Fixtures 12,883      
Gross Amount, Land 1,430      
Gross Amount, Buildings and Fixtures 21,167      
Total 22,597      
Accumulated Depreciation (15,608)      
Net $ 6,989      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1996      
Wholly Owned Properties - Residential | Lakeside | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,284      
Wholly Owned Properties - Residential | Lighthouse At Fleming Island        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 4,047      
Initial Cost Buildings and Fixtures 35,052      
Gross Amount, Land 4,047      
Gross Amount, Buildings and Fixtures 40,166      
Total 44,213      
Accumulated Depreciation (23,102)      
Net $ 21,111      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2003      
Wholly Owned Properties - Residential | Lighthouse At Fleming Island | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,114      
Wholly Owned Properties - Residential | Paddock Club Mandarin        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 1,411      
Initial Cost Buildings and Fixtures 14,967      
Gross Amount, Land 1,411      
Gross Amount, Buildings and Fixtures 18,255      
Total 19,666      
Accumulated Depreciation (10,246)      
Net $ 9,420      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Paddock Club Mandarin | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,288      
Wholly Owned Properties - Residential | St Augustine        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 2,857      
Initial Cost Buildings and Fixtures 6,475      
Gross Amount, Land 2,857      
Gross Amount, Buildings and Fixtures 25,050      
Total 27,907      
Accumulated Depreciation (12,664)      
Net $ 15,243      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | St Augustine | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
Wholly Owned Properties - Residential | St Augustine | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
Wholly Owned Properties - Residential | St Augustine | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 18,575      
Wholly Owned Properties - Residential | Tattersall At Tapestry Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 6,417      
Initial Cost Buildings and Fixtures 36,069      
Gross Amount, Land 6,417      
Gross Amount, Buildings and Fixtures 38,026      
Total 44,443      
Accumulated Depreciation (12,286)      
Net $ 32,157      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Tattersall At Tapestry Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,957      
Wholly Owned Properties - Residential | Woodhollow        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 1,686      
Initial Cost Buildings and Fixtures 15,179      
Gross Amount, Land 1,678      
Gross Amount, Buildings and Fixtures 24,397      
Total 26,075      
Accumulated Depreciation (18,279)      
Net $ 7,796      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Woodhollow | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (8)      
Wholly Owned Properties - Residential | Woodhollow | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,218      
Wholly Owned Properties - Residential | Colonial Grand at Lake Mary        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lake Mary, FL      
Initial Cost Land $ 6,346      
Initial Cost Buildings and Fixtures 41,539      
Gross Amount, Land 6,346      
Gross Amount, Buildings and Fixtures 66,422      
Total 72,768      
Accumulated Depreciation (16,359)      
Net $ 56,409      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Lake Mary | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 24,883      
Wholly Owned Properties - Residential | Colonial Grand At Town Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lake Mary, FL      
Initial Cost Land $ 5,742      
Initial Cost Buildings and Fixtures 56,562      
Gross Amount, Land 5,742      
Gross Amount, Buildings and Fixtures 62,866      
Total 68,608      
Accumulated Depreciation (20,707)      
Net $ 47,901      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Town Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,304      
Wholly Owned Properties - Residential | Colonial Grand At Town Park Reserve        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lake Mary, FL      
Initial Cost Land $ 3,481      
Initial Cost Buildings and Fixtures 10,311      
Gross Amount, Land 3,481      
Gross Amount, Buildings and Fixtures 10,821      
Total 14,302      
Accumulated Depreciation (3,642)      
Net $ 10,660      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2004      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Town Park Reserve | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 510      
Wholly Owned Properties - Residential | Colonial Grand At Heather Glen        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 4,662      
Initial Cost Buildings and Fixtures 56,988      
Gross Amount, Land 4,662      
Gross Amount, Buildings and Fixtures 64,353      
Total 69,015      
Accumulated Depreciation (19,815)      
Net $ 49,200      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Heather Glen | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,365      
Wholly Owned Properties - Residential | Colonial Grand At Randal Lakes        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 5,659      
Initial Cost Buildings and Fixtures 50,553      
Gross Amount, Land 5,659      
Gross Amount, Buildings and Fixtures 61,977      
Total 67,636      
Accumulated Depreciation (10,951)      
Net $ 56,685      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Randal Lakes | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 11,424      
Wholly Owned Properties - Residential | Colonial Grand at Randal Lakes I I        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 3,200      
Gross Amount, Land 3,200      
Gross Amount, Buildings and Fixtures 36,931      
Total 40,131      
Accumulated Depreciation (3,784)      
Net $ 36,347      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Randal Lakes I I | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 36,931      
Wholly Owned Properties - Residential | Post Lake at Baldwin Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 18,101      
Initial Cost Buildings and Fixtures 144,200      
Gross Amount, Land 18,101      
Gross Amount, Buildings and Fixtures 148,301      
Total 166,402      
Accumulated Depreciation (24,572)      
Net $ 141,830      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2011      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Lake at Baldwin Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,101      
Wholly Owned Properties - Residential | Post Lakeside        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 7,046      
Initial Cost Buildings and Fixtures 52,585      
Gross Amount, Land 7,046      
Gross Amount, Buildings and Fixtures 53,523      
Total 60,569      
Accumulated Depreciation (8,100)      
Net $ 52,469      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Lakeside | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 938      
Wholly Owned Properties - Residential | Post Parkside Orlando        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 5,669      
Initial Cost Buildings and Fixtures 49,754      
Gross Amount, Land 5,669      
Gross Amount, Buildings and Fixtures 55,053      
Total 60,722      
Accumulated Depreciation (9,093)      
Net $ 51,629      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Parkside Orlando | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,299      
Wholly Owned Properties - Residential | Retreat At Lake Nona        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 7,880      
Initial Cost Buildings and Fixtures 41,175      
Gross Amount, Land 7,880      
Gross Amount, Buildings and Fixtures 47,441      
Total 55,321      
Accumulated Depreciation (14,170)      
Net $ 41,151      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2006      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Wholly Owned Properties - Residential | Retreat At Lake Nona | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,266      
Wholly Owned Properties - Residential | Park Crest At Innisbrook        
Real Estate And Accumulated Depreciation [Line Items]        
Location Palm Harbor, FL      
Initial Cost Land $ 6,900      
Initial Cost Buildings and Fixtures 26,613      
Gross Amount, Land 6,900      
Gross Amount, Buildings and Fixtures 30,425      
Total 37,325      
Accumulated Depreciation (12,866)      
Net $ 24,459      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2009      
Wholly Owned Properties - Residential | Park Crest At Innisbrook | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,812      
Wholly Owned Properties - Residential | Club At Panama Beach        
Real Estate And Accumulated Depreciation [Line Items]        
Location Panama City, FL      
Initial Cost Land $ 898      
Initial Cost Buildings and Fixtures 14,276      
Gross Amount, Land 893      
Gross Amount, Buildings and Fixtures 18,902      
Total 19,795      
Accumulated Depreciation (11,057)      
Net $ 8,738      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Club At Panama Beach | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (5)      
Wholly Owned Properties - Residential | Club At Panama Beach | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,626      
Wholly Owned Properties - Residential | Colonial Village At Twin Lakes        
Real Estate And Accumulated Depreciation [Line Items]        
Location Sanford, FL      
Initial Cost Land $ 3,091      
Initial Cost Buildings and Fixtures 47,793      
Gross Amount, Land 3,091      
Gross Amount, Buildings and Fixtures 50,855      
Total 53,946      
Accumulated Depreciation (15,922)      
Net $ 38,024      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Twin Lakes | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,062      
Wholly Owned Properties - Residential | Paddock Club Tallahassee        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tallahassee, FL      
Initial Cost Land $ 530      
Initial Cost Buildings and Fixtures 4,805      
Gross Amount, Land 1,480      
Gross Amount, Buildings and Fixtures 19,271      
Total 20,751      
Accumulated Depreciation (13,992)      
Net $ 6,759      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1992      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Paddock Club Tallahassee | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 950      
Wholly Owned Properties - Residential | Paddock Club Tallahassee | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 14,466      
Wholly Owned Properties - Residential | Verandas at Southwood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tallahassee, FL      
Initial Cost Land $ 3,600      
Initial Cost Buildings and Fixtures 25,914      
Gross Amount, Land 3,600      
Gross Amount, Buildings and Fixtures 27,599      
Total 31,199      
Accumulated Depreciation (6,423)      
Net $ 24,776      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Verandas at Southwood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,685      
Wholly Owned Properties - Residential | Belmere        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 852      
Initial Cost Buildings and Fixtures 7,667      
Gross Amount, Land 852      
Gross Amount, Buildings and Fixtures 14,476      
Total 15,328      
Accumulated Depreciation (10,529)      
Net $ 4,799      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Belmere | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,809      
Wholly Owned Properties - Residential | Colonial Grand At Hampton Preserve        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 6,233      
Initial Cost Buildings and Fixtures 69,535      
Gross Amount, Land 6,233      
Gross Amount, Buildings and Fixtures 72,106      
Total 78,339      
Accumulated Depreciation (20,819)      
Net $ 57,520      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Hampton Preserve | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,571      
Wholly Owned Properties - Residential | Links At Carrollwood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 817      
Initial Cost Buildings and Fixtures 7,355      
Gross Amount, Land 927      
Gross Amount, Buildings and Fixtures 13,195      
Total 14,122      
Accumulated Depreciation (9,206)      
Net $ 4,916      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1980      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Links At Carrollwood | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 110      
Wholly Owned Properties - Residential | Links At Carrollwood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,840      
Wholly Owned Properties - Residential | Post Bay at Rocky Point        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 4,541      
Initial Cost Buildings and Fixtures 28,381      
Gross Amount, Land 4,541      
Gross Amount, Buildings and Fixtures 30,370      
Total 34,911      
Accumulated Depreciation (4,993)      
Net $ 29,918      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Bay at Rocky Point | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,989      
Wholly Owned Properties - Residential | Post Harbour Place        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 16,296      
Initial Cost Buildings and Fixtures 116,193      
Gross Amount, Land 16,296      
Gross Amount, Buildings and Fixtures 127,330      
Total 143,626      
Accumulated Depreciation (21,840)      
Net $ 121,786      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Harbour Place | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 11,137      
Wholly Owned Properties - Residential | Post Hyde Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 16,891      
Initial Cost Buildings and Fixtures 95,259      
Gross Amount, Land 16,891      
Gross Amount, Buildings and Fixtures 102,289      
Total 119,180      
Accumulated Depreciation (17,523)      
Net $ 101,657      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Hyde Park | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
Wholly Owned Properties - Residential | Post Hyde Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,030      
Wholly Owned Properties - Residential | Post Rocky Point        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 35,260      
Initial Cost Buildings and Fixtures 153,102      
Gross Amount, Land 35,260      
Gross Amount, Buildings and Fixtures 166,507      
Total 201,767      
Accumulated Depreciation (27,806)      
Net $ 173,961      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Rocky Point | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
Wholly Owned Properties - Residential | Post Rocky Point | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
Wholly Owned Properties - Residential | Post Rocky Point | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 13,405      
Wholly Owned Properties - Residential | Post Soho Square        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 5,190      
Initial Cost Buildings and Fixtures 56,296      
Gross Amount, Land 5,190      
Gross Amount, Buildings and Fixtures 57,194      
Total 62,384      
Accumulated Depreciation (8,535)      
Net $ 53,849      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Soho Square | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 898      
Wholly Owned Properties - Residential | Village Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 2,738      
Initial Cost Buildings and Fixtures 19,055      
Gross Amount, Land 2,891      
Gross Amount, Buildings and Fixtures 21,968      
Total 24,859      
Accumulated Depreciation (9,218)      
Net $ 15,641      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2008      
Wholly Owned Properties - Residential | Village Oaks | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 153      
Wholly Owned Properties - Residential | Village Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,913      
Wholly Owned Properties - Residential | Colonial Grand At Seven Oaks [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Wesley Chapel, FL      
Initial Cost Land $ 3,051      
Initial Cost Buildings and Fixtures 42,768      
Gross Amount, Land 3,051      
Gross Amount, Buildings and Fixtures 46,017      
Total 49,068      
Accumulated Depreciation (13,919)      
Net $ 35,149      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2004      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Seven Oaks [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,249      
Wholly Owned Properties - Residential | Colonial Grand At Windermere [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Windermere, FL      
Initial Cost Land $ 2,711      
Initial Cost Buildings and Fixtures 36,710      
Gross Amount, Land 2,711      
Gross Amount, Buildings and Fixtures 38,480      
Total 41,191      
Accumulated Depreciation (11,101)      
Net $ 30,090      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Windermere [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,770      
Wholly Owned Properties - Residential | MAA Briarcliff        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 24,645      
Initial Cost Buildings and Fixtures 114,921      
Gross Amount, Land 24,645      
Gross Amount, Buildings and Fixtures 119,687      
Total 144,332      
Accumulated Depreciation (19,281)      
Net $ 125,051      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Briarcliff | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,766      
Wholly Owned Properties - Residential | MAA Brookhaven        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 29,048      
Initial Cost Buildings and Fixtures 106,463      
Gross Amount, Land 29,048      
Gross Amount, Buildings and Fixtures 115,793      
Total 144,841      
Accumulated Depreciation (20,071)      
Net $ 124,770      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Brookhaven | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1989      
Wholly Owned Properties - Residential | MAA Brookhaven | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1992      
Wholly Owned Properties - Residential | MAA Brookhaven | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,330      
Wholly Owned Properties - Residential | MAA Brookwood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 11,168      
Initial Cost Buildings and Fixtures 52,758      
Gross Amount, Land 11,168      
Gross Amount, Buildings and Fixtures 58,538      
Total 69,706      
Accumulated Depreciation (17,638)      
Net $ 52,068      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Wholly Owned Properties - Residential | MAA Brookwood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,780      
Wholly Owned Properties - Residential | M A A Buckhead        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 8,633      
Initial Cost Buildings and Fixtures 19,844      
Gross Amount, Land 8,633      
Gross Amount, Buildings and Fixtures 29,778      
Total 38,411      
Accumulated Depreciation (9,589)      
Net $ 28,822      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Wholly Owned Properties - Residential | M A A Buckhead | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,934      
Wholly Owned Properties - Residential | MAA Centennial Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 13,650      
Initial Cost Buildings and Fixtures 10,950      
Gross Amount, Land 13,650      
Gross Amount, Buildings and Fixtures 72,792      
Total 86,442      
Accumulated Depreciation (5,984)      
Net $ 80,458      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2018      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Centennial Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 61,842      
Wholly Owned Properties - Residential | MAA Chastain        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 30,223      
Initial Cost Buildings and Fixtures 82,964      
Gross Amount, Land 30,223      
Gross Amount, Buildings and Fixtures 86,290      
Total 116,513      
Accumulated Depreciation (13,710)      
Net $ 102,803      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1990      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Chastain | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,326      
Wholly Owned Properties - Residential | MAA Dunwoody        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 15,799      
Initial Cost Buildings and Fixtures 48,054      
Gross Amount, Land 15,799      
Gross Amount, Buildings and Fixtures 52,029      
Total 67,828      
Accumulated Depreciation (8,616)      
Net $ 59,212      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1995      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Dunwoody | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,975      
Wholly Owned Properties - Residential | MAA Gardens        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 17,907      
Initial Cost Buildings and Fixtures 56,093      
Gross Amount, Land 17,907      
Gross Amount, Buildings and Fixtures 60,560      
Total 78,467      
Accumulated Depreciation (10,531)      
Net $ 67,936      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Gardens | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,467      
Wholly Owned Properties - Residential | MAA Glen        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 13,878      
Initial Cost Buildings and Fixtures 51,079      
Gross Amount, Land 13,878      
Gross Amount, Buildings and Fixtures 56,370      
Total 70,248      
Accumulated Depreciation (9,299)      
Net $ 60,949      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Glen | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,291      
Wholly Owned Properties - Residential | MAA Lenox        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 15,440      
Initial Cost Buildings and Fixtures 73,278      
Gross Amount, Land 15,440      
Gross Amount, Buildings and Fixtures 77,055      
Total 92,495      
Accumulated Depreciation (10,120)      
Net $ 82,375      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2006      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Lenox | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,777      
Wholly Owned Properties - Residential | MAA Lenox II        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 8,435      
Initial Cost Buildings and Fixtures 92,294      
Gross Amount, Land 8,435      
Gross Amount, Buildings and Fixtures 92,919      
Total 101,354      
Accumulated Depreciation (20,112)      
Net $ 81,242      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Lenox II | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 625      
Wholly Owned Properties - Residential | MAA Midtown        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 7,000      
Initial Cost Buildings and Fixtures 44,000      
Gross Amount, Land 7,000      
Gross Amount, Buildings and Fixtures 85,102      
Total 92,102      
Accumulated Depreciation (7,958)      
Net $ 84,144      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Midtown | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 41,102      
Wholly Owned Properties - Residential | MAA Oglethorpe        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 6,875      
Initial Cost Buildings and Fixtures 31,441      
Gross Amount, Land 6,856      
Gross Amount, Buildings and Fixtures 39,321      
Total 46,177      
Accumulated Depreciation (15,280)      
Net $ 30,897      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2008      
Wholly Owned Properties - Residential | MAA Oglethorpe | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (19)      
Wholly Owned Properties - Residential | MAA Oglethorpe | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,880      
Wholly Owned Properties - Residential | MAA Peachtree Hills        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 11,974      
Initial Cost Buildings and Fixtures 55,264      
Gross Amount, Land 11,974      
Gross Amount, Buildings and Fixtures 56,522      
Total 68,496      
Accumulated Depreciation (8,689)      
Net $ 59,807      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Peachtree Hills | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1992      
Wholly Owned Properties - Residential | MAA Peachtree Hills | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
Wholly Owned Properties - Residential | MAA Peachtree Hills | Phase III [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
Wholly Owned Properties - Residential | MAA Peachtree Hills | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,258      
Wholly Owned Properties - Residential | MAA Piedmont Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 11,025      
Initial Cost Buildings and Fixtures 34,277      
Gross Amount, Land 11,025      
Gross Amount, Buildings and Fixtures 36,565      
Total 47,590      
Accumulated Depreciation (5,599)      
Net $ 41,991      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Piedmont Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,288      
Wholly Owned Properties - Residential | MAA Riverside        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 23,765      
Initial Cost Buildings and Fixtures 89,369      
Gross Amount, Land 23,765      
Gross Amount, Buildings and Fixtures 98,115      
Total 121,880      
Accumulated Depreciation (17,720)      
Net $ 104,160      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Riverside | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,746      
Wholly Owned Properties - Residential | MAA Spring        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 18,596      
Initial Cost Buildings and Fixtures 57,819      
Gross Amount, Land 18,596      
Gross Amount, Buildings and Fixtures 63,542      
Total 82,138      
Accumulated Depreciation (11,169)      
Net $ 70,969      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Spring | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,723      
Wholly Owned Properties - Residential | MAA Stratford        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Buildings and Fixtures $ 30,051      
Gross Amount, Buildings and Fixtures 35,273      
Total 35,273      
Accumulated Depreciation (5,938)      
Net $ 29,335      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Stratford | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,222      
Wholly Owned Properties - Residential | MAA Berkeley Lake        
Real Estate And Accumulated Depreciation [Line Items]        
Location Duluth, GA      
Initial Cost Land $ 1,960      
Initial Cost Buildings and Fixtures 15,707      
Gross Amount, Land 1,960      
Gross Amount, Buildings and Fixtures 18,421      
Total 20,381      
Accumulated Depreciation (6,854)      
Net $ 13,527      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Berkeley Lake | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,714      
Wholly Owned Properties - Residential | MAA McDaniel Farm        
Real Estate And Accumulated Depreciation [Line Items]        
Location Duluth, GA      
Initial Cost Land $ 3,985      
Initial Cost Buildings and Fixtures 32,206      
Gross Amount, Land 3,985      
Gross Amount, Buildings and Fixtures 37,421      
Total 41,406      
Accumulated Depreciation (13,550)      
Net $ 27,856      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA McDaniel Farm | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,215      
Wholly Owned Properties - Residential | MAA Pleasant Hill        
Real Estate And Accumulated Depreciation [Line Items]        
Location Duluth, GA      
Initial Cost Land $ 6,753      
Initial Cost Buildings and Fixtures 32,202      
Gross Amount, Land 6,753      
Gross Amount, Buildings and Fixtures 38,778      
Total 45,531      
Accumulated Depreciation (13,125)      
Net $ 32,406      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Pleasant Hill | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,576      
Wholly Owned Properties - Residential | MAA Prescott        
Real Estate And Accumulated Depreciation [Line Items]        
Location Duluth, GA      
Initial Cost Land $ 3,840      
Initial Cost Buildings and Fixtures 24,011      
Gross Amount, Land 3,840      
Gross Amount, Buildings and Fixtures 29,093      
Total 32,933      
Accumulated Depreciation (15,852)      
Net $ 17,081      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2004      
Wholly Owned Properties - Residential | MAA Prescott | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,082      
Wholly Owned Properties - Residential | MAA River Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location Duluth, GA      
Initial Cost Land $ 4,360      
Initial Cost Buildings and Fixtures 13,579      
Gross Amount, Land 4,349      
Gross Amount, Buildings and Fixtures 16,828      
Total 21,177      
Accumulated Depreciation (7,345)      
Net $ 13,832      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1992      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA River Oaks | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (11)      
Wholly Owned Properties - Residential | MAA River Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,249      
Wholly Owned Properties - Residential | MAA River Place        
Real Estate And Accumulated Depreciation [Line Items]        
Location Duluth, GA      
Initial Cost Land $ 2,059      
Initial Cost Buildings and Fixtures 19,158      
Gross Amount, Land 2,059      
Gross Amount, Buildings and Fixtures 22,721      
Total 24,780      
Accumulated Depreciation (8,010)      
Net $ 16,770      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA River Place | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,563      
Wholly Owned Properties - Residential | MAA Mount Vernon        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dunwoody, GA      
Initial Cost Land $ 6,861      
Initial Cost Buildings and Fixtures 23,748      
Gross Amount, Land 6,861      
Gross Amount, Buildings and Fixtures 27,872      
Total 34,733      
Accumulated Depreciation (8,736)      
Net $ 25,997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Mount Vernon | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,124      
Wholly Owned Properties - Residential | MAA Lake Lanier        
Real Estate And Accumulated Depreciation [Line Items]        
Location Gainesville, GA      
Initial Cost Land $ 6,710      
Initial Cost Buildings and Fixtures 40,994      
Gross Amount, Land 6,710      
Gross Amount, Buildings and Fixtures 50,570      
Total 57,280      
Accumulated Depreciation (27,073)      
Net $ 30,207      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2005      
Wholly Owned Properties - Residential | MAA Lake Lanier | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
Wholly Owned Properties - Residential | MAA Lake Lanier | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
Wholly Owned Properties - Residential | MAA Lake Lanier | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,576      
Wholly Owned Properties - Residential | MAA Shiloh        
Real Estate And Accumulated Depreciation [Line Items]        
Location Kennesaw, GA      
Initial Cost Land $ 4,864      
Initial Cost Buildings and Fixtures 45,893      
Gross Amount, Land 4,864      
Gross Amount, Buildings and Fixtures 51,982      
Total 56,846      
Accumulated Depreciation (17,065)      
Net $ 39,781      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Shiloh | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,089      
Wholly Owned Properties - Residential | MAA Milstead        
Real Estate And Accumulated Depreciation [Line Items]        
Location LaGrange, GA      
Initial Cost Land $ 3,100      
Initial Cost Buildings and Fixtures 29,240      
Gross Amount, Land 3,100      
Gross Amount, Buildings and Fixtures 32,139      
Total 35,239      
Accumulated Depreciation (9,082)      
Net $ 26,157      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2008      
Wholly Owned Properties - Residential | MAA Milstead | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,899      
Wholly Owned Properties - Residential | MAA Barrett Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Marietta, GA      
Initial Cost Land $ 5,661      
Initial Cost Buildings and Fixtures 26,186      
Gross Amount, Land 5,661      
Gross Amount, Buildings and Fixtures 29,750      
Total 35,411      
Accumulated Depreciation (11,162)      
Net $ 24,249      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Barrett Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,564      
Wholly Owned Properties - Residential | Colonial Grand at Godley Lake        
Real Estate And Accumulated Depreciation [Line Items]        
Location Pooler, GA      
Initial Cost Land $ 1,750      
Initial Cost Buildings and Fixtures 30,893      
Gross Amount, Land 1,750      
Gross Amount, Buildings and Fixtures 32,914      
Total 34,664      
Accumulated Depreciation (10,184)      
Net $ 24,480      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Godley Lake | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,021      
Wholly Owned Properties - Residential | Colonial Grand at Godley Station [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Pooler, GA      
Encumbrances $ 6,588      
Initial Cost Land 1,800      
Initial Cost Buildings and Fixtures 35,454      
Gross Amount, Land 1,800      
Gross Amount, Buildings and Fixtures 39,626      
Total 41,426      
Accumulated Depreciation (12,117)      
Net $ 29,309      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Godley Station [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,172      
Wholly Owned Properties - Residential | Avala at Savannah Quarters [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Savannah, GA      
Initial Cost Land $ 1,500      
Initial Cost Buildings and Fixtures 24,862      
Gross Amount, Land 1,500      
Gross Amount, Buildings and Fixtures 27,185      
Total 28,685      
Accumulated Depreciation (8,982)      
Net $ 19,703      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Avala at Savannah Quarters [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,323      
Wholly Owned Properties - Residential | Colonial Grand at Hammocks [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Savannah, GA      
Initial Cost Land $ 2,441      
Initial Cost Buildings and Fixtures 36,863      
Gross Amount, Land 2,441      
Gross Amount, Buildings and Fixtures 42,315      
Total 44,756      
Accumulated Depreciation (13,065)      
Net $ 31,691      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Hammocks [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,452      
Wholly Owned Properties - Residential | Colonial Village at Greentree [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Savannah, GA      
Initial Cost Land $ 1,710      
Initial Cost Buildings and Fixtures 10,494      
Gross Amount, Land 1,710      
Gross Amount, Buildings and Fixtures 12,857      
Total 14,567      
Accumulated Depreciation (4,769)      
Net $ 9,798      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Greentree [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,363      
Wholly Owned Properties - Residential | Colonial Village at Huntington [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Savannah, GA      
Initial Cost Land $ 2,521      
Initial Cost Buildings and Fixtures 8,223      
Gross Amount, Land 2,521      
Gross Amount, Buildings and Fixtures 10,136      
Total 12,657      
Accumulated Depreciation (3,378)      
Net $ 9,279      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Huntington [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,913      
Wholly Owned Properties - Residential | Colonial Village at Marsh Cove [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Savannah, GA      
Initial Cost Land $ 5,231      
Initial Cost Buildings and Fixtures 8,555      
Gross Amount, Land 5,231      
Gross Amount, Buildings and Fixtures 10,650      
Total 15,881      
Accumulated Depreciation (4,016)      
Net $ 11,865      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1983      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Marsh Cove [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,095      
Wholly Owned Properties - Residential | Georgetown Grove [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Savannah, GA      
Initial Cost Land $ 1,288      
Initial Cost Buildings and Fixtures 11,579      
Gross Amount, Land 1,288      
Gross Amount, Buildings and Fixtures 15,176      
Total 16,464      
Accumulated Depreciation (10,950)      
Net $ 5,514      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Georgetown Grove [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,597      
Wholly Owned Properties - Residential | Oaks at Wilmington Island [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Savannah, GA      
Initial Cost Land $ 2,910      
Initial Cost Buildings and Fixtures 25,315      
Gross Amount, Land 2,864      
Gross Amount, Buildings and Fixtures 30,587      
Total 33,451      
Accumulated Depreciation (14,649)      
Net $ 18,802      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2006      
Wholly Owned Properties - Residential | Oaks at Wilmington Island [Member] | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (46)      
Wholly Owned Properties - Residential | Oaks at Wilmington Island [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,272      
Wholly Owned Properties - Residential | MAA West Village [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Smyrna, GA      
Initial Cost Land $ 14,410      
Initial Cost Buildings and Fixtures 73,733      
Gross Amount, Land 14,410      
Gross Amount, Buildings and Fixtures 83,063      
Total 97,473      
Accumulated Depreciation (18,741)      
Net $ 78,732      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2014      
Wholly Owned Properties - Residential | MAA West Village [Member] | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2006      
Wholly Owned Properties - Residential | MAA West Village [Member] | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
Wholly Owned Properties - Residential | MAA West Village [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,330      
Wholly Owned Properties - Residential | Ranch at Prairie Trace [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Overland Park, KS      
Initial Cost Land $ 3,500      
Initial Cost Buildings and Fixtures 40,614      
Gross Amount, Land 3,500      
Gross Amount, Buildings and Fixtures 42,662      
Total 46,162      
Accumulated Depreciation (6,292)      
Net $ 39,870      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | Ranch at Prairie Trace [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,048      
Wholly Owned Properties - Residential | Grand Reserve at Pinnacle [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lexington, KY      
Initial Cost Land $ 2,024      
Initial Cost Buildings and Fixtures 31,525      
Gross Amount, Land 2,024      
Gross Amount, Buildings and Fixtures 38,245      
Total 40,269      
Accumulated Depreciation (20,846)      
Net $ 19,423      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Grand Reserve at Pinnacle [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,720      
Wholly Owned Properties - Residential | Lakepointe [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lexington, KY      
Initial Cost Land $ 411      
Initial Cost Buildings and Fixtures 3,699      
Gross Amount, Land 411      
Gross Amount, Buildings and Fixtures 6,431      
Total 6,842      
Accumulated Depreciation (4,903)      
Net $ 1,939      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Lakepointe [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,732      
Wholly Owned Properties - Residential | The Mansion [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lexington, KY      
Initial Cost Land $ 694      
Initial Cost Buildings and Fixtures 6,242      
Gross Amount, Land 694      
Gross Amount, Buildings and Fixtures 10,275      
Total 10,969      
Accumulated Depreciation (7,831)      
Net $ 3,138      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1989      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | The Mansion [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,033      
Wholly Owned Properties - Residential | The Village [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lexington, KY      
Initial Cost Land $ 900      
Initial Cost Buildings and Fixtures 8,097      
Gross Amount, Land 900      
Gross Amount, Buildings and Fixtures 13,091      
Total 13,991      
Accumulated Depreciation (10,026)      
Net $ 3,965      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1989      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | The Village [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,994      
Wholly Owned Properties - Residential | Stonemill Village [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Louisville, KY      
Initial Cost Land $ 1,169      
Initial Cost Buildings and Fixtures 10,518      
Gross Amount, Land 1,169      
Gross Amount, Buildings and Fixtures 20,407      
Total 21,576      
Accumulated Depreciation (15,351)      
Net $ 6,225      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Stonemill Village [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,889      
Wholly Owned Properties - Residential | Market Station        
Real Estate And Accumulated Depreciation [Line Items]        
Location Kansas City, MO      
Initial Cost Land $ 5,814      
Initial Cost Buildings and Fixtures 46,241      
Gross Amount, Land 5,814      
Gross Amount, Buildings and Fixtures 49,737      
Total 55,551      
Accumulated Depreciation (14,079)      
Net $ 41,472      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Wholly Owned Properties - Residential | Market Station | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,496      
Wholly Owned Properties - Residential | The Denton [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Kansas City, MO      
Initial Cost Land $ 750      
Initial Cost Buildings and Fixtures 8,795      
Gross Amount, Land 750      
Gross Amount, Buildings and Fixtures 9,764      
Total 10,514      
Accumulated Depreciation (1,331)      
Net $ 9,183      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2014      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | The Denton [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 969      
Wholly Owned Properties - Residential | The Denton II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Kansas City, MO      
Initial Cost Land $ 770      
Gross Amount, Land 770      
Gross Amount, Buildings and Fixtures 24,644      
Total 25,414      
Accumulated Depreciation (1,915)      
Net $ 23,499      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | The Denton II [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 24,644      
Wholly Owned Properties - Residential | The Denton III        
Real Estate And Accumulated Depreciation [Line Items]        
Location Kansas City, MO      
Initial Cost Land $ 4,000      
Initial Cost Buildings and Fixtures 42,144      
Gross Amount, Land 4,000      
Gross Amount, Buildings and Fixtures 45,012      
Total 49,012      
Accumulated Depreciation (7,062)      
Net $ 41,950      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | The Denton III | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Wholly Owned Properties - Residential | The Denton III | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2014      
Wholly Owned Properties - Residential | The Denton III | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,868      
Wholly Owned Properties - Residential | Crosswinds [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jackson, MS      
Initial Cost Land $ 1,535      
Initial Cost Buildings and Fixtures 13,826      
Gross Amount, Land 1,535      
Gross Amount, Buildings and Fixtures 20,696      
Total 22,231      
Accumulated Depreciation (15,016)      
Net $ 7,215      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1989      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1996      
Wholly Owned Properties - Residential | Crosswinds [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,870      
Wholly Owned Properties - Residential | Pear Orchard [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jackson, MS      
Initial Cost Land $ 1,351      
Initial Cost Buildings and Fixtures 12,168      
Gross Amount, Land 1,351      
Gross Amount, Buildings and Fixtures 19,976      
Total 21,327      
Accumulated Depreciation (15,389)      
Net $ 5,938      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Pear Orchard [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,808      
Wholly Owned Properties - Residential | Reflection Pointe [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jackson, MS      
Initial Cost Land $ 710      
Initial Cost Buildings and Fixtures 8,770      
Gross Amount, Land 848      
Gross Amount, Buildings and Fixtures 17,317      
Total 18,165      
Accumulated Depreciation (12,990)      
Net $ 5,175      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1988      
Wholly Owned Properties - Residential | Reflection Pointe [Member] | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 138      
Wholly Owned Properties - Residential | Reflection Pointe [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,547      
Wholly Owned Properties - Residential | Lakeshore Landing [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Ridgeland, MS      
Initial Cost Land $ 676      
Initial Cost Buildings and Fixtures 6,284      
Gross Amount, Land 676      
Gross Amount, Buildings and Fixtures 10,541      
Total 11,217      
Accumulated Depreciation (5,812)      
Net $ 5,405      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1974      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Lakeshore Landing [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,257      
Wholly Owned Properties - Residential | Colonial Village at beaver creek [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Apex, NC      
Initial Cost Land $ 7,491      
Initial Cost Buildings and Fixtures 34,863      
Gross Amount, Land 7,491      
Gross Amount, Buildings and Fixtures 37,792      
Total 45,283      
Accumulated Depreciation (11,386)      
Net $ 33,897      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at beaver creek [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,929      
Wholly Owned Properties - Residential | Hermitage at Beechtree [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Cary, NC      
Initial Cost Land $ 900      
Initial Cost Buildings and Fixtures 8,099      
Gross Amount, Land 900      
Gross Amount, Buildings and Fixtures 13,541      
Total 14,441      
Accumulated Depreciation (9,487)      
Net $ 4,954      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1988      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Hermitage at Beechtree [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,442      
Wholly Owned Properties - Residential | Waterford Forest [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Cary, NC      
Initial Cost Land $ 4,000      
Initial Cost Buildings and Fixtures 20,250      
Gross Amount, Land 4,000      
Gross Amount, Buildings and Fixtures 25,143      
Total 29,143      
Accumulated Depreciation (12,793)      
Net $ 16,350      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2005      
Wholly Owned Properties - Residential | Waterford Forest [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,893      
Wholly Owned Properties - Residential | MAA 1225        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 9,612      
Initial Cost Buildings and Fixtures 22,342      
Gross Amount, Land 9,612      
Gross Amount, Buildings and Fixtures 52,001      
Total 61,613      
Accumulated Depreciation (12,555)      
Net $ 49,058      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | MAA 1225 | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 29,659      
Wholly Owned Properties - Residential | MAA Ayrsley        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 2,481      
Initial Cost Buildings and Fixtures 52,119      
Gross Amount, Land 2,481      
Gross Amount, Buildings and Fixtures 67,895      
Total 70,376      
Accumulated Depreciation (18,765)      
Net $ 51,611      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Ayrsley | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 15,776      
Wholly Owned Properties - Residential | MAA Ballantyne        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 16,216      
Initial Cost Buildings and Fixtures 44,817      
Gross Amount, Land 16,216      
Gross Amount, Buildings and Fixtures 48,190      
Total 64,406      
Accumulated Depreciation (7,866)      
Net $ 56,540      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2004      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Ballantyne | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,373      
Wholly Owned Properties - Residential | MAA Beverly Crest        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 3,161      
Initial Cost Buildings and Fixtures 24,004      
Gross Amount, Land 3,161      
Gross Amount, Buildings and Fixtures 27,995      
Total 31,156      
Accumulated Depreciation (8,526)      
Net $ 22,630      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Beverly Crest | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,991      
Wholly Owned Properties - Residential | MAA Chancellor Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 5,311      
Initial Cost Buildings and Fixtures 28,016      
Gross Amount, Land 5,311      
Gross Amount, Buildings and Fixtures 33,211      
Total 38,522      
Accumulated Depreciation (10,515)      
Net $ 28,007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Chancellor Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,195      
Wholly Owned Properties - Residential | MAA City Grand        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 1,620      
Initial Cost Buildings and Fixtures 17,499      
Gross Amount, Land 1,620      
Gross Amount, Buildings and Fixtures 18,732      
Total 20,352      
Accumulated Depreciation (5,494)      
Net $ 14,858      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA City Grand | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,233      
Wholly Owned Properties - Residential | MAA Enclave        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 1,461      
Initial Cost Buildings and Fixtures 18,984      
Gross Amount, Land 1,461      
Gross Amount, Buildings and Fixtures 20,865      
Total 22,326      
Accumulated Depreciation (5,651)      
Net $ 16,675      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Enclave | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,881      
Wholly Owned Properties - Residential | MAA Gateway        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 17,528      
Initial Cost Buildings and Fixtures 57,444      
Gross Amount, Land 17,528      
Gross Amount, Buildings and Fixtures 63,633      
Total 81,161      
Accumulated Depreciation (11,000)      
Net $ 70,161      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Gateway | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,189      
Wholly Owned Properties - Residential | MAA Legacy Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 2,891      
Initial Cost Buildings and Fixtures 28,272      
Gross Amount, Land 2,891      
Gross Amount, Buildings and Fixtures 31,872      
Total 34,763      
Accumulated Depreciation (9,899)      
Net $ 24,864      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Legacy Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,600      
Wholly Owned Properties - Residential | MAA Prosperity Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 4,591      
Initial Cost Buildings and Fixtures 27,713      
Gross Amount, Land 4,591      
Gross Amount, Buildings and Fixtures 30,329      
Total 34,920      
Accumulated Depreciation (9,662)      
Net $ 25,258      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Prosperity Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,616      
Wholly Owned Properties - Residential | MAA Reserve        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 4,628      
Initial Cost Buildings and Fixtures 44,282      
Gross Amount, Land 4,628      
Gross Amount, Buildings and Fixtures 57,732      
Total 62,360      
Accumulated Depreciation (9,812)      
Net $ 52,548      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Reserve | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 13,450      
Wholly Owned Properties - Residential | MAA South Line        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 18,835      
Initial Cost Buildings and Fixtures 58,795      
Gross Amount, Land 18,835      
Gross Amount, Buildings and Fixtures 62,169      
Total 81,004      
Accumulated Depreciation (9,182)      
Net $ 71,822      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA South Line | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,374      
Wholly Owned Properties - Residential | MAA South Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 20,869      
Initial Cost Buildings and Fixtures 65,517      
Gross Amount, Land 20,869      
Gross Amount, Buildings and Fixtures 71,662      
Total 92,531      
Accumulated Depreciation (11,933)      
Net $ 80,598      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA South Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,145      
Wholly Owned Properties - Residential | MAA South Tryon        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 2,260      
Initial Cost Buildings and Fixtures 19,489      
Gross Amount, Land 2,260      
Gross Amount, Buildings and Fixtures 22,269      
Total 24,529      
Accumulated Depreciation (6,982)      
Net $ 17,547      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA South Tryon | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,780      
Wholly Owned Properties - Residential | MAA Timbercrest        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 2,901      
Initial Cost Buildings and Fixtures 17,192      
Gross Amount, Land 2,901      
Gross Amount, Buildings and Fixtures 20,588      
Total 23,489      
Accumulated Depreciation (6,183)      
Net $ 17,306      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Timbercrest | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,396      
Wholly Owned Properties - Residential | MAA University Lake        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 3,250      
Initial Cost Buildings and Fixtures 31,389      
Gross Amount, Land 3,250      
Gross Amount, Buildings and Fixtures 36,539      
Total 39,789      
Accumulated Depreciation (11,864)      
Net $ 27,925      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA University Lake | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,150      
Wholly Owned Properties - Residential | MAA Uptown        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 10,888      
Initial Cost Buildings and Fixtures 30,078      
Gross Amount, Land 10,888      
Gross Amount, Buildings and Fixtures 32,876      
Total 43,764      
Accumulated Depreciation (5,527)      
Net $ 38,237      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Uptown | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,798      
Wholly Owned Properties - Residential | MAA Cornelius        
Real Estate And Accumulated Depreciation [Line Items]        
Location Cornelius, NC      
Initial Cost Land $ 4,571      
Initial Cost Buildings and Fixtures 29,151      
Gross Amount, Land 4,571      
Gross Amount, Buildings and Fixtures 31,275      
Total 35,846      
Accumulated Depreciation (10,161)      
Net $ 25,685      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Cornelius | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,124      
Wholly Owned Properties - Residential | Colonial Grand at Patterson Place [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Durham, NC      
Initial Cost Land $ 2,590      
Initial Cost Buildings and Fixtures 27,126      
Gross Amount, Land 2,590      
Gross Amount, Buildings and Fixtures 30,945      
Total 33,535      
Accumulated Depreciation (9,593)      
Net $ 23,942      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Patterson Place [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,819      
Wholly Owned Properties - Residential | Colonial Grand at Research Park [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Durham, NC      
Initial Cost Land $ 4,201      
Initial Cost Buildings and Fixtures 37,682      
Gross Amount, Land 4,201      
Gross Amount, Buildings and Fixtures 41,690      
Total 45,891      
Accumulated Depreciation (13,146)      
Net $ 32,745      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Research Park [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,008      
Wholly Owned Properties - Residential | Colonial Village at Deerfield        
Real Estate And Accumulated Depreciation [Line Items]        
Location Durham, NC      
Initial Cost Land $ 3,271      
Initial Cost Buildings and Fixtures 15,609      
Gross Amount, Land 3,271      
Gross Amount, Buildings and Fixtures 17,613      
Total 20,884      
Accumulated Depreciation (6,425)      
Net $ 14,459      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Deerfield | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,004      
Wholly Owned Properties - Residential | MAA Huntersville        
Real Estate And Accumulated Depreciation [Line Items]        
Location Huntersville, NC      
Initial Cost Land $ 4,251      
Initial Cost Buildings and Fixtures 31,948      
Gross Amount, Land 4,251      
Gross Amount, Buildings and Fixtures 35,660      
Total 39,911      
Accumulated Depreciation (11,287)      
Net $ 28,624      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Huntersville | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,712      
Wholly Owned Properties - Residential | MAA Fifty One        
Real Estate And Accumulated Depreciation [Line Items]        
Location Matthews, NC      
Initial Cost Land $ 3,071      
Initial Cost Buildings and Fixtures 21,830      
Gross Amount, Land 3,071      
Gross Amount, Buildings and Fixtures 27,896      
Total 30,967      
Accumulated Depreciation (9,892)      
Net $ 21,075      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Fifty One | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,066      
Wholly Owned Properties - Residential | MAA Matthews Commons        
Real Estate And Accumulated Depreciation [Line Items]        
Location Matthews, NC      
Initial Cost Land $ 3,690      
Initial Cost Buildings and Fixtures 28,536      
Gross Amount, Land 3,690      
Gross Amount, Buildings and Fixtures 31,208      
Total 34,898      
Accumulated Depreciation (9,824)      
Net $ 25,074      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | MAA Matthews Commons | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,672      
Wholly Owned Properties - Residential | Reserve at Arringdon        
Real Estate And Accumulated Depreciation [Line Items]        
Location Morrisville, NC      
Initial Cost Land $ 6,401      
Initial Cost Buildings and Fixtures 31,134      
Gross Amount, Land 6,401      
Gross Amount, Buildings and Fixtures 35,338      
Total 41,739      
Accumulated Depreciation (11,039)      
Net $ 30,700      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Reserve at Arringdon | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,204      
Wholly Owned Properties - Residential | Colonial Grand At Brier Creek Raleigh Nc        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 7,372      
Initial Cost Buildings and Fixtures 50,202      
Gross Amount, Land 7,372      
Gross Amount, Buildings and Fixtures 53,179      
Total 60,551      
Accumulated Depreciation (15,996)      
Net $ 44,555      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Brier Creek Raleigh Nc | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,977      
Wholly Owned Properties - Residential | Colonial Grand At Brier Falls Raleigh Nc        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 6,572      
Initial Cost Buildings and Fixtures 48,910      
Gross Amount, Land 6,572      
Gross Amount, Buildings and Fixtures 51,670      
Total 58,242      
Accumulated Depreciation (15,174)      
Net $ 43,068      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Brier Falls Raleigh Nc | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,760      
Wholly Owned Properties - Residential | Colonial Grand At Crabtree Valley        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 2,241      
Initial Cost Buildings and Fixtures 18,434      
Gross Amount, Land 2,241      
Gross Amount, Buildings and Fixtures 20,945      
Total 23,186      
Accumulated Depreciation (6,105)      
Net $ 17,081      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Crabtree Valley | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,511      
Wholly Owned Properties - Residential | Colonial Grand At Trinity Commons        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 5,232      
Initial Cost Buildings and Fixtures 45,138      
Gross Amount, Land 5,232      
Gross Amount, Buildings and Fixtures 50,206      
Total 55,438      
Accumulated Depreciation (16,100)      
Net $ 39,338      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Trinity Commons | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
Wholly Owned Properties - Residential | Colonial Grand At Trinity Commons | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
Wholly Owned Properties - Residential | Colonial Grand At Trinity Commons | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,068      
Wholly Owned Properties - Residential | Hue        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 3,690      
Initial Cost Buildings and Fixtures 29,910      
Gross Amount, Land 3,690      
Gross Amount, Buildings and Fixtures 32,489      
Total 36,179      
Accumulated Depreciation (8,967)      
Net $ 27,212      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | Hue | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,579      
Wholly Owned Properties - Residential | Post Parksideat Wade        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 7,196      
Initial Cost Buildings and Fixtures 51,972      
Gross Amount, Land 7,196      
Gross Amount, Buildings and Fixtures 54,659      
Total 61,855      
Accumulated Depreciation (8,476)      
Net $ 53,379      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2011      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Parksideat Wade | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,687      
Wholly Owned Properties - Residential | Post Parksideat Wade I I        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 9,450      
Initial Cost Buildings and Fixtures 46,316      
Gross Amount, Land 10,037      
Gross Amount, Buildings and Fixtures 48,525      
Total 58,562      
Accumulated Depreciation (11,932)      
Net $ 46,630      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Parksideat Wade I I | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 587      
Wholly Owned Properties - Residential | Post Parksideat Wade I I | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,209      
Wholly Owned Properties - Residential | Post Parkside At Wade I I I        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 2,200      
Gross Amount, Land 2,200      
Gross Amount, Buildings and Fixtures 22,407      
Total 24,607      
Accumulated Depreciation (1,142)      
Net $ 23,465      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2019      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Parkside At Wade I I I | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 22,407      
Wholly Owned Properties - Residential | Preserve At Brier Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 5,850      
Initial Cost Buildings and Fixtures 21,980      
Gross Amount, Land 5,831      
Gross Amount, Buildings and Fixtures 48,735      
Total 54,566      
Accumulated Depreciation (21,121)      
Net $ 33,445      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2004      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2006      
Wholly Owned Properties - Residential | Preserve At Brier Creek | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (19)      
Wholly Owned Properties - Residential | Preserve At Brier Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 26,755      
Wholly Owned Properties - Residential | Providence At Brier Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 4,695      
Initial Cost Buildings and Fixtures 29,007      
Gross Amount, Land 4,695      
Gross Amount, Buildings and Fixtures 31,444      
Total 36,139      
Accumulated Depreciation (13,463)      
Net $ 22,676      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2008      
Wholly Owned Properties - Residential | Providence At Brier Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,437      
Wholly Owned Properties - Residential | Colonial Grand at Desert Vista        
Real Estate And Accumulated Depreciation [Line Items]        
Location North Las Vegas, NV      
Initial Cost Land $ 4,091      
Initial Cost Buildings and Fixtures 29,826      
Gross Amount, Land 4,091      
Gross Amount, Buildings and Fixtures 32,129      
Total 36,220      
Accumulated Depreciation (10,207)      
Net $ 26,013      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Desert Vista | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,303      
Wholly Owned Properties - Residential | Colonial Grand at Palm Vista        
Real Estate And Accumulated Depreciation [Line Items]        
Location North Las Vegas, NV      
Initial Cost Land $ 4,909      
Initial Cost Buildings and Fixtures 25,643      
Gross Amount, Land 4,909      
Gross Amount, Buildings and Fixtures 29,961      
Total 34,870      
Accumulated Depreciation (9,973)      
Net $ 24,897      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Palm Vista | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,318      
Wholly Owned Properties - Residential | Tanglewood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Anderson, SC      
Initial Cost Land $ 427      
Initial Cost Buildings and Fixtures 3,853      
Gross Amount, Land 427      
Gross Amount, Buildings and Fixtures 6,594      
Total 7,021      
Accumulated Depreciation (5,376)      
Net $ 1,645      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1980      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Tanglewood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,741      
Wholly Owned Properties - Residential | 1201 Midtown        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charleston, SC      
Initial Cost Land $ 11,929      
Initial Cost Buildings and Fixtures 57,885      
Gross Amount, Land 11,929      
Gross Amount, Buildings and Fixtures 58,839      
Total 70,768      
Accumulated Depreciation (7,130)      
Net $ 63,638      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | 1201 Midtown | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 954      
Wholly Owned Properties - Residential | 1201 Midtown II        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charleston, SC      
Initial Cost Land $ 6,750      
Initial Cost Buildings and Fixtures 5,874      
Gross Amount, Land 6,750      
Gross Amount, Buildings and Fixtures 22,325      
Total 29,075      
Accumulated Depreciation (1,600)      
Net $ 27,475      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2018      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | 1201 Midtown II | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 16,451      
Wholly Owned Properties - Residential | Colonial Grand At Cypress Cove        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charleston, SC      
Initial Cost Land $ 3,610      
Initial Cost Buildings and Fixtures 28,645      
Gross Amount, Land 3,610      
Gross Amount, Buildings and Fixtures 31,362      
Total 34,972      
Accumulated Depreciation (10,031)      
Net $ 24,941      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Cypress Cove | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,717      
Wholly Owned Properties - Residential | Colonial Village At Hampton Pointe        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charleston, SC      
Initial Cost Land $ 3,971      
Initial Cost Buildings and Fixtures 22,790      
Gross Amount, Land 3,971      
Gross Amount, Buildings and Fixtures 29,755      
Total 33,726      
Accumulated Depreciation (9,304)      
Net $ 24,422      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Hampton Pointe | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,965      
Wholly Owned Properties - Residential | Colonial Village At Westchase        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charleston, SC      
Initial Cost Land $ 4,571      
Initial Cost Buildings and Fixtures 20,091      
Gross Amount, Land 4,571      
Gross Amount, Buildings and Fixtures 24,930      
Total 29,501      
Accumulated Depreciation (8,766)      
Net $ 20,735      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Westchase | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,839      
Wholly Owned Properties - Residential | Quarterdeck at James Island        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charleston, SC      
Initial Cost Land $ 920      
Initial Cost Buildings and Fixtures 24,097      
Gross Amount, Land 920      
Gross Amount, Buildings and Fixtures 30,570      
Total 31,490      
Accumulated Depreciation (9,639)      
Net $ 21,851      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Quarterdeck at James Island | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,473      
Wholly Owned Properties - Residential | Rivers Walk        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charleston, SC      
Initial Cost Land $ 8,831      
Initial Cost Buildings and Fixtures 39,430      
Gross Amount, Land 8,831      
Gross Amount, Buildings and Fixtures 41,953      
Total 50,784      
Accumulated Depreciation (6,852)      
Net $ 43,932      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Rivers Walk | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Wholly Owned Properties - Residential | Rivers Walk | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2016      
Wholly Owned Properties - Residential | Rivers Walk | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,523      
Wholly Owned Properties - Residential | Paddock Club Columbia        
Real Estate And Accumulated Depreciation [Line Items]        
Location Columbia, SC      
Initial Cost Land $ 1,840      
Initial Cost Buildings and Fixtures 16,560      
Gross Amount, Land 1,840      
Gross Amount, Buildings and Fixtures 21,730      
Total 23,570      
Accumulated Depreciation (15,547)      
Net $ 8,023      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1991      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Paddock Club Columbia | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,170      
Wholly Owned Properties - Residential | The Fairways        
Real Estate And Accumulated Depreciation [Line Items]        
Location Columbia, SC      
Initial Cost Land $ 910      
Initial Cost Buildings and Fixtures 8,207      
Gross Amount, Land 910      
Gross Amount, Buildings and Fixtures 11,635      
Total 12,545      
Accumulated Depreciation (9,073)      
Net $ 3,472      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1992      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | The Fairways | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,428      
Wholly Owned Properties - Residential | Colonial Village At Windsor Place        
Real Estate And Accumulated Depreciation [Line Items]        
Location Goose Creek, SC      
Initial Cost Land $ 1,321      
Initial Cost Buildings and Fixtures 14,163      
Gross Amount, Land 1,321      
Gross Amount, Buildings and Fixtures 17,928      
Total 19,249      
Accumulated Depreciation (6,376)      
Net $ 12,873      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Windsor Place | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,765      
Wholly Owned Properties - Residential | Highland Ridge        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
Initial Cost Land $ 482      
Initial Cost Buildings and Fixtures 4,337      
Gross Amount, Land 482      
Gross Amount, Buildings and Fixtures 7,335      
Total 7,817      
Accumulated Depreciation (5,123)      
Net $ 2,694      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Highland Ridge | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,998      
Wholly Owned Properties - Residential | Howell Commons        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
Initial Cost Land $ 1,304      
Initial Cost Buildings and Fixtures 11,740      
Gross Amount, Land 1,304      
Gross Amount, Buildings and Fixtures 16,155      
Total 17,459      
Accumulated Depreciation (11,843)      
Net $ 5,616      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Howell Commons | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,415      
Wholly Owned Properties - Residential | Innovation Apartment Homes        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
Initial Cost Land $ 4,437      
Initial Cost Buildings and Fixtures 52,026      
Gross Amount, Land 4,437      
Gross Amount, Buildings and Fixtures 54,249      
Total 58,686      
Accumulated Depreciation (8,075)      
Net $ 50,611      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Innovation Apartment Homes | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,223      
Wholly Owned Properties - Residential | Paddock Club Greenville        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
Initial Cost Land $ 1,200      
Initial Cost Buildings and Fixtures 10,800      
Gross Amount, Land 1,200      
Gross Amount, Buildings and Fixtures 13,949      
Total 15,149      
Accumulated Depreciation (9,730)      
Net $ 5,419      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Paddock Club Greenville | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,149      
Wholly Owned Properties - Residential | Park Haywood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
Initial Cost Land $ 325      
Initial Cost Buildings and Fixtures 2,925      
Gross Amount, Land 360      
Gross Amount, Buildings and Fixtures 7,692      
Total 8,052      
Accumulated Depreciation (5,857)      
Net $ 2,195      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1983      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1993      
Wholly Owned Properties - Residential | Park Haywood | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 35      
Wholly Owned Properties - Residential | Park Haywood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,767      
Wholly Owned Properties - Residential | Spring Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
Initial Cost Land $ 597      
Initial Cost Buildings and Fixtures 5,374      
Gross Amount, Land 583      
Gross Amount, Buildings and Fixtures 8,347      
Total 8,930      
Accumulated Depreciation (6,216)      
Net $ 2,714      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Spring Creek | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (14)      
Wholly Owned Properties - Residential | Spring Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,973      
Wholly Owned Properties - Residential | The Greene [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
Initial Cost Land $ 5,420      
Initial Cost Buildings and Fixtures 66,546      
Gross Amount, Land 5,427      
Gross Amount, Buildings and Fixtures 67,146      
Total 72,573      
Accumulated Depreciation (2,072)      
Net $ 70,501      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2019      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2019      
Wholly Owned Properties - Residential | The Greene [Member] | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7      
Wholly Owned Properties - Residential | The Greene [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 600      
Wholly Owned Properties - Residential | Runaway Bay        
Real Estate And Accumulated Depreciation [Line Items]        
Location Mt. Pleasant, SC      
Initial Cost Land $ 1,085      
Initial Cost Buildings and Fixtures 7,269      
Gross Amount, Land 1,097      
Gross Amount, Buildings and Fixtures 13,891      
Total 14,988      
Accumulated Depreciation (10,344)      
Net $ 4,644      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1988      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Runaway Bay | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 12      
Wholly Owned Properties - Residential | Runaway Bay | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,622      
Wholly Owned Properties - Residential | Colonial Grand At Commerce Park Charleston Sc        
Real Estate And Accumulated Depreciation [Line Items]        
Location North Charleston, SC      
Initial Cost Land $ 2,780      
Initial Cost Buildings and Fixtures 33,966      
Gross Amount, Land 2,780      
Gross Amount, Buildings and Fixtures 37,480      
Total 40,260      
Accumulated Depreciation (11,287)      
Net $ 28,973      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Commerce Park Charleston Sc | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,514      
Wholly Owned Properties - Residential | Brookwood535        
Real Estate And Accumulated Depreciation [Line Items]        
Location Simpsonville, SC      
Initial Cost Land $ 1,216      
Initial Cost Buildings and Fixtures 18,666      
Gross Amount, Land 1,216      
Gross Amount, Buildings and Fixtures 20,888      
Total 22,104      
Accumulated Depreciation (7,605)      
Net $ 14,499      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | Brookwood535 | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,222      
Wholly Owned Properties - Residential | Park Place        
Real Estate And Accumulated Depreciation [Line Items]        
Location Spartanburg, SC      
Initial Cost Land $ 723      
Initial Cost Buildings and Fixtures 6,504      
Gross Amount, Land 723      
Gross Amount, Buildings and Fixtures 9,315      
Total 10,038      
Accumulated Depreciation (6,870)      
Net $ 3,168      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Park Place | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,811      
Wholly Owned Properties - Residential | Colonial Village At Waters Edge        
Real Estate And Accumulated Depreciation [Line Items]        
Location Summerville, SC      
Initial Cost Land $ 2,103      
Initial Cost Buildings and Fixtures 9,187      
Gross Amount, Land 2,103      
Gross Amount, Buildings and Fixtures 13,724      
Total 15,827      
Accumulated Depreciation (5,627)      
Net $ 10,200      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Waters Edge | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,537      
Wholly Owned Properties - Residential | Farmington Village        
Real Estate And Accumulated Depreciation [Line Items]        
Location Summerville, SC      
Initial Cost Land $ 2,800      
Initial Cost Buildings and Fixtures 26,295      
Gross Amount, Land 2,800      
Gross Amount, Buildings and Fixtures 29,258      
Total 32,058      
Accumulated Depreciation (13,242)      
Net $ 18,816      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2007      
Wholly Owned Properties - Residential | Farmington Village | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,963      
Wholly Owned Properties - Residential | Hamilton Pointe        
Real Estate And Accumulated Depreciation [Line Items]        
Location Chattanooga, TN      
Initial Cost Land $ 1,131      
Initial Cost Buildings and Fixtures 10,632      
Gross Amount, Land 1,131      
Gross Amount, Buildings and Fixtures 17,320      
Total 18,451      
Accumulated Depreciation (8,622)      
Net $ 9,829      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1989      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1992      
Wholly Owned Properties - Residential | Hamilton Pointe | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,688      
Wholly Owned Properties - Residential | Hidden Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Chattanooga, TN      
Initial Cost Land $ 972      
Initial Cost Buildings and Fixtures 8,954      
Gross Amount, Land 972      
Gross Amount, Buildings and Fixtures 15,829      
Total 16,801      
Accumulated Depreciation (7,757)      
Net $ 9,044      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1988      
Wholly Owned Properties - Residential | Hidden Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,875      
Wholly Owned Properties - Residential | Steeplechase        
Real Estate And Accumulated Depreciation [Line Items]        
Location Chattanooga, TN      
Initial Cost Land $ 217      
Initial Cost Buildings and Fixtures 1,957      
Gross Amount, Land 217      
Gross Amount, Buildings and Fixtures 6,177      
Total 6,394      
Accumulated Depreciation (3,835)      
Net $ 2,559      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1991      
Wholly Owned Properties - Residential | Steeplechase | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,220      
Wholly Owned Properties - Residential | Windridge        
Real Estate And Accumulated Depreciation [Line Items]        
Location Chattanooga, TN      
Initial Cost Land $ 817      
Initial Cost Buildings and Fixtures 7,416      
Gross Amount, Land 817      
Gross Amount, Buildings and Fixtures 11,814      
Total 12,631      
Accumulated Depreciation (8,498)      
Net $ 4,133      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Windridge | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,398      
Wholly Owned Properties - Residential | Kirby Station        
Real Estate And Accumulated Depreciation [Line Items]        
Location Memphis, TN      
Initial Cost Land $ 1,148      
Initial Cost Buildings and Fixtures 10,337      
Gross Amount, Land 1,148      
Gross Amount, Buildings and Fixtures 20,715      
Total 21,863      
Accumulated Depreciation (15,153)      
Net $ 6,710      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1978      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Kirby Station | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 10,378      
Wholly Owned Properties - Residential | Lincoln On Green        
Real Estate And Accumulated Depreciation [Line Items]        
Location Memphis, TN      
Initial Cost Land $ 1,498      
Initial Cost Buildings and Fixtures 20,483      
Gross Amount, Land 1,498      
Gross Amount, Buildings and Fixtures 37,204      
Total 38,702      
Accumulated Depreciation (27,617)      
Net $ 11,085      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1992      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Lincoln On Green | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 16,721      
Wholly Owned Properties - Residential | Park Estate        
Real Estate And Accumulated Depreciation [Line Items]        
Location Memphis, TN      
Initial Cost Land $ 178      
Initial Cost Buildings and Fixtures 1,141      
Gross Amount, Land 178      
Gross Amount, Buildings and Fixtures 4,728      
Total 4,906      
Accumulated Depreciation (3,482)      
Net $ 1,424      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1974      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1977      
Wholly Owned Properties - Residential | Park Estate | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,587      
Wholly Owned Properties - Residential | Reserve At Dexter Lake        
Real Estate And Accumulated Depreciation [Line Items]        
Location Memphis, TN      
Initial Cost Land $ 1,260      
Initial Cost Buildings and Fixtures 16,043      
Gross Amount, Land 3,407      
Gross Amount, Buildings and Fixtures 59,923      
Total 63,330      
Accumulated Depreciation (30,350)      
Net $ 32,980      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Reserve At Dexter Lake | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,147      
Wholly Owned Properties - Residential | Reserve At Dexter Lake | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 43,880      
Wholly Owned Properties - Residential | Paddock Club Murfreesboro        
Real Estate And Accumulated Depreciation [Line Items]        
Location Murfreesboro, TN      
Initial Cost Land $ 915      
Initial Cost Buildings and Fixtures 14,774      
Gross Amount, Land 915      
Gross Amount, Buildings and Fixtures 18,818      
Total 19,733      
Accumulated Depreciation (10,577)      
Net $ 9,156      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Paddock Club Murfreesboro | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,044      
Wholly Owned Properties - Residential | Acklen West End        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 12,761      
Initial Cost Buildings and Fixtures 58,906      
Gross Amount, Land 12,761      
Gross Amount, Buildings and Fixtures 60,620      
Total 73,381      
Accumulated Depreciation (6,643)      
Net $ 66,738      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2017      
Wholly Owned Properties - Residential | Acklen West End | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,714      
Wholly Owned Properties - Residential | Aventura At Indian Lake Village        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 4,950      
Initial Cost Buildings and Fixtures 28,053      
Gross Amount, Land 4,950      
Gross Amount, Buildings and Fixtures 30,800      
Total 35,750      
Accumulated Depreciation (9,845)      
Net $ 25,905      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Aventura At Indian Lake Village | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,747      
Wholly Owned Properties - Residential | Avondale At Kennesaw        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 3,456      
Initial Cost Buildings and Fixtures 22,443      
Gross Amount, Land 3,456      
Gross Amount, Buildings and Fixtures 26,454      
Total 29,910      
Accumulated Depreciation (9,468)      
Net $ 20,442      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | Avondale At Kennesaw | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,011      
Wholly Owned Properties - Residential | Brentwood Downs        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 1,193      
Initial Cost Buildings and Fixtures 10,739      
Gross Amount, Land 1,191      
Gross Amount, Buildings and Fixtures 19,685      
Total 20,876      
Accumulated Depreciation (13,542)      
Net $ 7,334      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Brentwood Downs | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (2)      
Wholly Owned Properties - Residential | Brentwood Downs | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,946      
Wholly Owned Properties - Residential | Charlotteat M Idtown        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 7,898      
Initial Cost Buildings and Fixtures 54,480      
Gross Amount, Land 7,898      
Gross Amount, Buildings and Fixtures 56,172      
Total 64,070      
Accumulated Depreciation (6,139)      
Net $ 57,931      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2016      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2017      
Wholly Owned Properties - Residential | Charlotteat M Idtown | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,692      
Wholly Owned Properties - Residential | Colonial Grand At Bellevue        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 17,278      
Initial Cost Buildings and Fixtures 64,196      
Gross Amount, Land 17,276      
Gross Amount, Buildings and Fixtures 69,773      
Total 87,049      
Accumulated Depreciation (17,249)      
Net $ 69,800      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Bellevue | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
Wholly Owned Properties - Residential | Colonial Grand At Bellevue | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
Wholly Owned Properties - Residential | Colonial Grand At Bellevue | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (2)      
Wholly Owned Properties - Residential | Colonial Grand At Bellevue | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,577      
Wholly Owned Properties - Residential | Grand View Nashville        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 2,963      
Initial Cost Buildings and Fixtures 33,673      
Gross Amount, Land 2,963      
Gross Amount, Buildings and Fixtures 42,450      
Total 45,413      
Accumulated Depreciation (22,334)      
Net $ 23,079      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Grand View Nashville | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,777      
Wholly Owned Properties - Residential | Monthaven Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 2,736      
Initial Cost Buildings and Fixtures 28,902      
Gross Amount, Land 2,736      
Gross Amount, Buildings and Fixtures 35,148      
Total 37,884      
Accumulated Depreciation (19,946)      
Net $ 17,938      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2004      
Wholly Owned Properties - Residential | Monthaven Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,246      
Wholly Owned Properties - Residential | Park At Hermitage        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 1,524      
Initial Cost Buildings and Fixtures 14,800      
Gross Amount, Land 1,524      
Gross Amount, Buildings and Fixtures 23,639      
Total 25,163      
Accumulated Depreciation (18,064)      
Net $ 7,099      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Park At Hermitage | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,839      
Wholly Owned Properties - Residential | Venue At Cool Springs        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 6,670      
Gross Amount, Land 6,670      
Gross Amount, Buildings and Fixtures 52,837      
Total 59,507      
Accumulated Depreciation (11,775)      
Net $ 47,732      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | Venue At Cool Springs | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 52,837      
Wholly Owned Properties - Residential | Verandas At Sam Ridley        
Real Estate And Accumulated Depreciation [Line Items]        
Location Nashville, TN      
Initial Cost Land $ 3,350      
Initial Cost Buildings and Fixtures 28,308      
Gross Amount, Land 3,350      
Gross Amount, Buildings and Fixtures 32,200      
Total 35,550      
Accumulated Depreciation (11,401)      
Net $ 24,149      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | Verandas At Sam Ridley | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,892      
Wholly Owned Properties - Residential | Balcones Woods        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 1,598      
Initial Cost Buildings and Fixtures 14,398      
Gross Amount, Land 1,598      
Gross Amount, Buildings and Fixtures 24,183      
Total 25,781      
Accumulated Depreciation (17,292)      
Net $ 8,489      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1983      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | Balcones Woods | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,785      
Wholly Owned Properties - Residential | Colonial Grand At Canyon Creek Austin Tx        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 3,621      
Initial Cost Buildings and Fixtures 32,137      
Gross Amount, Land 3,621      
Gross Amount, Buildings and Fixtures 34,349      
Total 37,970      
Accumulated Depreciation (10,837)      
Net $ 27,133      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Canyon Creek Austin Tx | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,212      
Wholly Owned Properties - Residential | Colonial Grand at Canyon Pointe        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 3,778      
Initial Cost Buildings and Fixtures 20,201      
Gross Amount, Land 3,778      
Gross Amount, Buildings and Fixtures 22,981      
Total 26,759      
Accumulated Depreciation (7,995)      
Net $ 18,764      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Canyon Pointe | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,780      
Wholly Owned Properties - Residential | Colonial Grand At Double Creek Austin Tx        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 3,131      
Initial Cost Buildings and Fixtures 29,375      
Gross Amount, Land 3,131      
Gross Amount, Buildings and Fixtures 30,659      
Total 33,790      
Accumulated Depreciation (9,669)      
Net $ 24,121      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Double Creek Austin Tx | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,284      
Wholly Owned Properties - Residential | Colonial Grand At Onion Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 4,902      
Initial Cost Buildings and Fixtures 33,010      
Gross Amount, Land 4,902      
Gross Amount, Buildings and Fixtures 35,692      
Total 40,594      
Accumulated Depreciation (11,464)      
Net $ 29,130      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Onion Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,682      
Wholly Owned Properties - Residential | Colonial Grand At Wells Branch        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 3,094      
Initial Cost Buildings and Fixtures 32,283      
Gross Amount, Land 3,388      
Gross Amount, Buildings and Fixtures 34,570      
Total 37,958      
Accumulated Depreciation (10,328)      
Net $ 27,630      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand At Wells Branch | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 294      
Wholly Owned Properties - Residential | Colonial Grand At Wells Branch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,287      
Wholly Owned Properties - Residential | Colonial Village At Quarry Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 4,621      
Initial Cost Buildings and Fixtures 34,461      
Gross Amount, Land 4,621      
Gross Amount, Buildings and Fixtures 41,758      
Total 46,379      
Accumulated Depreciation (14,463)      
Net $ 31,916      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Quarry Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,297      
Wholly Owned Properties - Residential | Grand Reserve At Sunset Valley        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 3,150      
Initial Cost Buildings and Fixtures 11,393      
Gross Amount, Land 3,150      
Gross Amount, Buildings and Fixtures 15,457      
Total 18,607      
Accumulated Depreciation (8,415)      
Net $ 10,192      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2004      
Wholly Owned Properties - Residential | Grand Reserve At Sunset Valley | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,064      
Wholly Owned Properties - Residential | Legacy At Western Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 9,100      
Initial Cost Buildings and Fixtures 49,339      
Gross Amount, Land 9,100      
Gross Amount, Buildings and Fixtures 50,958      
Total 60,058      
Accumulated Depreciation (15,957)      
Net $ 44,101      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2009      
Wholly Owned Properties - Residential | Legacy At Western Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,619      
Wholly Owned Properties - Residential | Post Barton Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 8,683      
Initial Cost Buildings and Fixtures 21,497      
Gross Amount, Land 8,683      
Gross Amount, Buildings and Fixtures 23,276      
Total 31,959      
Accumulated Depreciation (4,315)      
Net $ 27,644      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Barton Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,779      
Wholly Owned Properties - Residential | Post Park Mesa        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 4,653      
Initial Cost Buildings and Fixtures 19,828      
Gross Amount, Land 4,653      
Gross Amount, Buildings and Fixtures 21,154      
Total 25,807      
Accumulated Depreciation (3,423)      
Net $ 22,384      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1992      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Park Mesa | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,326      
Wholly Owned Properties - Residential | Post South Lamar        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 11,542      
Initial Cost Buildings and Fixtures 41,293      
Gross Amount, Land 11,542      
Gross Amount, Buildings and Fixtures 44,997      
Total 56,539      
Accumulated Depreciation (8,822)      
Net $ 47,717      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2011      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post South Lamar | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,704      
Wholly Owned Properties - Residential | Post South Lamar I I        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 9,000      
Initial Cost Buildings and Fixtures 32,800      
Gross Amount, Land 9,000      
Gross Amount, Buildings and Fixtures 52,934      
Total 61,934      
Accumulated Depreciation (5,292)      
Net $ 56,642      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post South Lamar I I | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 20,134      
Wholly Owned Properties - Residential | Post West Austin        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 7,805      
Initial Cost Buildings and Fixtures 48,843      
Gross Amount, Land 7,805      
Gross Amount, Buildings and Fixtures 51,046      
Total 58,851      
Accumulated Depreciation (9,935)      
Net $ 48,916      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post West Austin | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,203      
Wholly Owned Properties - Residential | Silverado at Brushy Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 2,900      
Initial Cost Buildings and Fixtures 24,009      
Gross Amount, Land 2,900      
Gross Amount, Buildings and Fixtures 28,797      
Total 31,697      
Accumulated Depreciation (14,486)      
Net $ 17,211      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2006      
Wholly Owned Properties - Residential | Silverado at Brushy Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,788      
Wholly Owned Properties - Residential | Sixty 600        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 2,281      
Initial Cost Buildings and Fixtures 6,169      
Gross Amount, Land 2,281      
Gross Amount, Buildings and Fixtures 13,963      
Total 16,244      
Accumulated Depreciation (9,297)      
Net $ 6,947      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Sixty 600 | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,794      
Wholly Owned Properties - Residential | Stassney Woods        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 1,621      
Initial Cost Buildings and Fixtures 7,501      
Gross Amount, Land 1,621      
Gross Amount, Buildings and Fixtures 15,904      
Total 17,525      
Accumulated Depreciation (10,580)      
Net $ 6,945      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Stassney Woods | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,403      
Wholly Owned Properties - Residential | The Woods on Barton Skyway        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 1,405      
Initial Cost Buildings and Fixtures 12,769      
Gross Amount, Land 1,405      
Gross Amount, Buildings and Fixtures 24,812      
Total 26,217      
Accumulated Depreciation (12,214)      
Net $ 14,003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1977      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1997      
Wholly Owned Properties - Residential | The Woods on Barton Skyway | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 12,043      
Wholly Owned Properties - Residential | Colonial Village at Shoal Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Bedford, TX      
Initial Cost Land $ 4,982      
Initial Cost Buildings and Fixtures 27,377      
Gross Amount, Land 4,982      
Gross Amount, Buildings and Fixtures 31,840      
Total 36,822      
Accumulated Depreciation (10,699)      
Net $ 26,123      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Shoal Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,463      
Wholly Owned Properties - Residential | Colonial Village at Willow Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Bedford, TX      
Initial Cost Land $ 3,109      
Initial Cost Buildings and Fixtures 33,488      
Gross Amount, Land 3,109      
Gross Amount, Buildings and Fixtures 42,453      
Total 45,562      
Accumulated Depreciation (14,258)      
Net $ 31,304      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Willow Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,965      
Wholly Owned Properties - Residential | Colonial Grand at Hebron        
Real Estate And Accumulated Depreciation [Line Items]        
Location Carrollton, TX      
Initial Cost Land $ 4,231      
Initial Cost Buildings and Fixtures 42,237      
Gross Amount, Land 4,231      
Gross Amount, Buildings and Fixtures 44,553      
Total 48,784      
Accumulated Depreciation (12,640)      
Net $ 36,144      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2011      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Hebron | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,316      
Wholly Owned Properties - Residential | Colonial Grand at Silverado        
Real Estate And Accumulated Depreciation [Line Items]        
Location Cedar Park, TX      
Initial Cost Land $ 3,282      
Initial Cost Buildings and Fixtures 24,935      
Gross Amount, Land 3,282      
Gross Amount, Buildings and Fixtures 26,781      
Total 30,063      
Accumulated Depreciation (8,371)      
Net $ 21,692      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Silverado | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,846      
Wholly Owned Properties - Residential | Colonial Grand at Silverado Reserve        
Real Estate And Accumulated Depreciation [Line Items]        
Location Cedar Park, TX      
Initial Cost Land $ 3,951      
Initial Cost Buildings and Fixtures 31,705      
Gross Amount, Land 3,951      
Gross Amount, Buildings and Fixtures 34,293      
Total 38,244      
Accumulated Depreciation (10,495)      
Net $ 27,749      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2005      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Silverado Reserve | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,588      
Wholly Owned Properties - Residential | Grand Cypress        
Real Estate And Accumulated Depreciation [Line Items]        
Location Cypress, TX      
Initial Cost Land $ 3,881      
Initial Cost Buildings and Fixtures 24,267      
Gross Amount, Land 3,881      
Gross Amount, Buildings and Fixtures 26,081      
Total 29,962      
Accumulated Depreciation (6,036)      
Net $ 23,926      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Grand Cypress | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,814      
Wholly Owned Properties - Residential | Colonial Reserve at Medical District        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 4,050      
Initial Cost Buildings and Fixtures 33,779      
Gross Amount, Land 4,050      
Gross Amount, Buildings and Fixtures 36,594      
Total 40,644      
Accumulated Depreciation (10,055)      
Net $ 30,589      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Reserve at Medical District | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,815      
Wholly Owned Properties - Residential | Courtyards at Campbell        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 988      
Initial Cost Buildings and Fixtures 8,893      
Gross Amount, Land 988      
Gross Amount, Buildings and Fixtures 13,220      
Total 14,208      
Accumulated Depreciation (9,130)      
Net $ 5,078      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Courtyards at Campbell | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,327      
Wholly Owned Properties - Residential | Deer Run        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 1,252      
Initial Cost Buildings and Fixtures 11,271      
Gross Amount, Land 1,252      
Gross Amount, Buildings and Fixtures 16,305      
Total 17,557      
Accumulated Depreciation (11,804)      
Net $ 5,753      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Deer Run | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,034      
Wholly Owned Properties - Residential | Grand Courtyards        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 2,730      
Initial Cost Buildings and Fixtures 22,240      
Gross Amount, Land 2,730      
Gross Amount, Buildings and Fixtures 27,088      
Total 29,818      
Accumulated Depreciation (13,175)      
Net $ 16,643      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2006      
Wholly Owned Properties - Residential | Grand Courtyards | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,848      
Wholly Owned Properties - Residential | Legends at Lowe's Farm        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 5,016      
Initial Cost Buildings and Fixtures 41,091      
Gross Amount, Land 5,016      
Gross Amount, Buildings and Fixtures 44,007      
Total 49,023      
Accumulated Depreciation (14,543)      
Net $ 34,480      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Legends at Lowe's Farm | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,916      
Wholly Owned Properties - Residential | MAA Frisco Bridges I/III        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 8,745      
Initial Cost Buildings and Fixtures 66,571      
Gross Amount, Land 8,745      
Gross Amount, Buildings and Fixtures 70,467      
Total 79,212      
Accumulated Depreciation (16,574)      
Net $ 62,638      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Frisco Bridges I/III | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,896      
Wholly Owned Properties - Residential | MAA McKinney Avenue        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 13,178      
Initial Cost Buildings and Fixtures 24,048      
Gross Amount, Land 13,178      
Gross Amount, Buildings and Fixtures 28,296      
Total 41,474      
Accumulated Depreciation (4,339)      
Net $ 37,135      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA McKinney Avenue | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,248      
Wholly Owned Properties - Residential | MAA McKinney Avenue II        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 13,621      
Initial Cost Buildings and Fixtures 8,608      
Gross Amount, Land 13,621      
Gross Amount, Buildings and Fixtures 11,334      
Total 24,955      
Accumulated Depreciation (1,984)      
Net $ 22,971      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1993      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA McKinney Avenue II | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,726      
Wholly Owned Properties - Residential | MAA McKinney Avenue III        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 7,966      
Initial Cost Buildings and Fixtures 7,471      
Gross Amount, Land 7,966      
Gross Amount, Buildings and Fixtures 9,407      
Total 17,373      
Accumulated Depreciation (1,565)      
Net $ 15,808      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA McKinney Avenue III | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,936      
Wholly Owned Properties - Residential | MAA Worthington        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 13,713      
Initial Cost Buildings and Fixtures 43,268      
Gross Amount, Land 13,713      
Gross Amount, Buildings and Fixtures 49,324      
Total 63,037      
Accumulated Depreciation (7,368)      
Net $ 55,669      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | MAA Worthington | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1993      
Wholly Owned Properties - Residential | MAA Worthington | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
Wholly Owned Properties - Residential | MAA Worthington | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,056      
Wholly Owned Properties - Residential | Post Abbey        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 2,711      
Initial Cost Buildings and Fixtures 4,369      
Gross Amount, Land 2,711      
Gross Amount, Buildings and Fixtures 4,772      
Total 7,483      
Accumulated Depreciation (813)      
Net $ 6,670      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Abbey | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 403      
Wholly Owned Properties - Residential | Post Addison Circle        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 12,308      
Initial Cost Buildings and Fixtures 189,419      
Gross Amount, Land 12,308      
Gross Amount, Buildings and Fixtures 204,421      
Total 216,729      
Accumulated Depreciation (33,343)      
Net $ 183,386      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Addison Circle | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
Wholly Owned Properties - Residential | Post Addison Circle | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
Wholly Owned Properties - Residential | Post Addison Circle | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 15,002      
Wholly Owned Properties - Residential | Post Cole's Corner        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 13,030      
Initial Cost Buildings and Fixtures 14,383      
Gross Amount, Land 13,030      
Gross Amount, Buildings and Fixtures 17,358      
Total 30,388      
Accumulated Depreciation (3,309)      
Net $ 27,079      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Cole's Corner | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,975      
Wholly Owned Properties - Residential | Post Eastside        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 7,134      
Initial Cost Buildings and Fixtures 58,095      
Gross Amount, Land 7,134      
Gross Amount, Buildings and Fixtures 60,488      
Total 67,622      
Accumulated Depreciation (10,636)      
Net $ 56,986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Eastside | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,393      
Wholly Owned Properties - Residential | Post Gallery        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 4,391      
Initial Cost Buildings and Fixtures 7,910      
Gross Amount, Land 4,391      
Gross Amount, Buildings and Fixtures 8,989      
Total 13,380      
Accumulated Depreciation (1,852)      
Net $ 11,528      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Gallery | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,079      
Wholly Owned Properties - Residential | Post Heights        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 26,245      
Initial Cost Buildings and Fixtures 37,922      
Gross Amount, Land 26,245      
Gross Amount, Buildings and Fixtures 40,342      
Total 66,587      
Accumulated Depreciation (7,074)      
Net $ 59,513      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Heights | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
Wholly Owned Properties - Residential | Post Heights | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
Wholly Owned Properties - Residential | Post Heights | Phase III [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
Wholly Owned Properties - Residential | Post Heights | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,420      
Wholly Owned Properties - Residential | Post Katy Trail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 10,333      
Initial Cost Buildings and Fixtures 32,456      
Gross Amount, Land 10,333      
Gross Amount, Buildings and Fixtures 33,830      
Total 44,163      
Accumulated Depreciation (5,130)      
Net $ 39,033      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Katy Trail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,374      
Wholly Owned Properties - Residential | Post Legacy        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 6,575      
Initial Cost Buildings and Fixtures 55,277      
Gross Amount, Land 6,575      
Gross Amount, Buildings and Fixtures 60,058      
Total 66,633      
Accumulated Depreciation (9,694)      
Net $ 56,939      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Legacy | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,781      
Wholly Owned Properties - Residential | Post Meridian        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 8,780      
Initial Cost Buildings and Fixtures 13,654      
Gross Amount, Land 8,780      
Gross Amount, Buildings and Fixtures 14,493      
Total 23,273      
Accumulated Depreciation (2,611)      
Net $ 20,662      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1991      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Meridian | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 839      
Wholly Owned Properties - Residential | Post Uptown Village        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 34,974      
Initial Cost Buildings and Fixtures 33,213      
Gross Amount, Land 34,974      
Gross Amount, Buildings and Fixtures 39,182      
Total 74,156      
Accumulated Depreciation (7,154)      
Net $ 67,002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Uptown Village | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1995      
Wholly Owned Properties - Residential | Post Uptown Village | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
Wholly Owned Properties - Residential | Post Uptown Village | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,969      
Wholly Owned Properties - Residential | Watermark        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 960      
Initial Cost Buildings and Fixtures 14,438      
Gross Amount, Land 960      
Gross Amount, Buildings and Fixtures 17,518      
Total 18,478      
Accumulated Depreciation (9,748)      
Net $ 8,730      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2004      
Wholly Owned Properties - Residential | Watermark | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,080      
Wholly Owned Properties - Residential | Colonial Grand at Bear Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Euless, TX      
Initial Cost Land $ 6,453      
Initial Cost Buildings and Fixtures 30,048      
Gross Amount, Land 6,453      
Gross Amount, Buildings and Fixtures 33,685      
Total 40,138      
Accumulated Depreciation (11,649)      
Net $ 28,489      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Bear Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,637      
Wholly Owned Properties - Residential | Colonial Grand at Fairview        
Real Estate And Accumulated Depreciation [Line Items]        
Location Fairview, TX      
Initial Cost Land $ 2,171      
Initial Cost Buildings and Fixtures 35,077      
Gross Amount, Land 2,171      
Gross Amount, Buildings and Fixtures 36,468      
Total 38,639      
Accumulated Depreciation (10,300)      
Net $ 28,339      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Fairview | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,391      
Wholly Owned Properties - Residential | La Valencia at Starwood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Frisco, TX      
Initial Cost Land $ 3,240      
Initial Cost Buildings and Fixtures 26,069      
Gross Amount, Land 3,240      
Gross Amount, Buildings and Fixtures 28,110      
Total 31,350      
Accumulated Depreciation (10,144)      
Net $ 21,206      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | La Valencia at Starwood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,041      
Wholly Owned Properties - Residential | Colonial Village at Grapevine        
Real Estate And Accumulated Depreciation [Line Items]        
Location Grapevine, TX      
Initial Cost Land $ 2,351      
Initial Cost Buildings and Fixtures 29,757      
Gross Amount, Land 2,351      
Gross Amount, Buildings and Fixtures 36,742      
Total 39,093      
Accumulated Depreciation (11,674)      
Net $ 27,419      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Grapevine | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1985      
Wholly Owned Properties - Residential | Colonial Village at Grapevine | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
Wholly Owned Properties - Residential | Colonial Village at Grapevine | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,985      
Wholly Owned Properties - Residential | Greenwood Forest        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 3,465      
Initial Cost Buildings and Fixtures 23,482      
Gross Amount, Land 3,465      
Gross Amount, Buildings and Fixtures 25,167      
Total 28,632      
Accumulated Depreciation (6,907)      
Net $ 21,725      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Greenwood Forest | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,685      
Wholly Owned Properties - Residential | Legacy Pines        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 2,157      
Initial Cost Buildings and Fixtures 19,066      
Gross Amount, Land 2,142      
Gross Amount, Buildings and Fixtures 23,238      
Total 25,380      
Accumulated Depreciation (13,617)      
Net $ 11,763      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2003      
Wholly Owned Properties - Residential | Legacy Pines | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (15)      
Wholly Owned Properties - Residential | Legacy Pines | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,172      
Wholly Owned Properties - Residential | Park Place Houston        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 2,061      
Initial Cost Buildings and Fixtures 15,830      
Gross Amount, Land 2,061      
Gross Amount, Buildings and Fixtures 19,051      
Total 21,112      
Accumulated Depreciation (9,071)      
Net $ 12,041      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2007      
Wholly Owned Properties - Residential | Park Place Houston | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,221      
Wholly Owned Properties - Residential | Post 510        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 7,227      
Initial Cost Buildings and Fixtures 33,366      
Gross Amount, Land 7,227      
Gross Amount, Buildings and Fixtures 34,297      
Total 41,524      
Accumulated Depreciation (6,287)      
Net $ 35,237      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2014      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post 510 | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 931      
Wholly Owned Properties - Residential | Post at Afton Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 11,503      
Initial Cost Buildings and Fixtures 65,469      
Gross Amount, Land 11,503      
Gross Amount, Buildings and Fixtures 69,598      
Total 81,101      
Accumulated Depreciation (14,474)      
Net $ 66,627      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post at Afton Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,129      
Wholly Owned Properties - Residential | Post Midtown Square        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 19,038      
Initial Cost Buildings and Fixtures 89,570      
Gross Amount, Land 19,038      
Gross Amount, Buildings and Fixtures 94,278      
Total 113,316      
Accumulated Depreciation (16,178)      
Net $ 97,138      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Midtown Square | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
Wholly Owned Properties - Residential | Post Midtown Square | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Wholly Owned Properties - Residential | Post Midtown Square | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,708      
Wholly Owned Properties - Residential | Ranchstone        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 1,480      
Initial Cost Buildings and Fixtures 14,807      
Gross Amount, Land 1,480      
Gross Amount, Buildings and Fixtures 18,150      
Total 19,630      
Accumulated Depreciation (8,367)      
Net $ 11,263      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2007      
Wholly Owned Properties - Residential | Ranchstone | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,343      
Wholly Owned Properties - Residential | Reserve at Woodwind Lakes        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 1,968      
Initial Cost Buildings and Fixtures 19,928      
Gross Amount, Land 1,968      
Gross Amount, Buildings and Fixtures 24,479      
Total 26,447      
Accumulated Depreciation (11,956)      
Net $ 14,491      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2006      
Wholly Owned Properties - Residential | Reserve at Woodwind Lakes | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,551      
Wholly Owned Properties - Residential | Retreat at Vintage Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 8,211      
Initial Cost Buildings and Fixtures 40,352      
Gross Amount, Land 8,211      
Gross Amount, Buildings and Fixtures 42,056      
Total 50,267      
Accumulated Depreciation (6,774)      
Net $ 43,493      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2014      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2014      
Wholly Owned Properties - Residential | Retreat at Vintage Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,704      
Wholly Owned Properties - Residential | Yale at 6th        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 13,107      
Initial Cost Buildings and Fixtures 62,764      
Gross Amount, Land 13,107      
Gross Amount, Buildings and Fixtures 64,873      
Total 77,980      
Accumulated Depreciation (8,309)      
Net $ 69,671      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Yale at 6th | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,109      
Wholly Owned Properties - Residential | Cascade at Fall Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Humble, TX      
Initial Cost Land $ 5,985      
Initial Cost Buildings and Fixtures 40,011      
Gross Amount, Land 5,985      
Gross Amount, Buildings and Fixtures 43,610      
Total 49,595      
Accumulated Depreciation (19,437)      
Net $ 30,158      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2007      
Wholly Owned Properties - Residential | Cascade at Fall Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,599      
Wholly Owned Properties - Residential | Bella Casita        
Real Estate And Accumulated Depreciation [Line Items]        
Location Irving, TX      
Initial Cost Land $ 2,521      
Initial Cost Buildings and Fixtures 26,432      
Gross Amount, Land 2,521      
Gross Amount, Buildings and Fixtures 30,326      
Total 32,847      
Accumulated Depreciation (10,396)      
Net $ 22,451      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | Bella Casita | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,894      
Wholly Owned Properties - Residential | Colonial Grand at Valley Ranch        
Real Estate And Accumulated Depreciation [Line Items]        
Location Irving, TX      
Initial Cost Land $ 5,072      
Initial Cost Buildings and Fixtures 37,397      
Gross Amount, Land 5,072      
Gross Amount, Buildings and Fixtures 51,184      
Total 56,256      
Accumulated Depreciation (17,704)      
Net $ 38,552      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Valley Ranch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 13,787      
Wholly Owned Properties - Residential | Colonial Reserve at Las Colinas        
Real Estate And Accumulated Depreciation [Line Items]        
Location Irving, TX      
Initial Cost Land $ 3,902      
Initial Cost Buildings and Fixtures 40,691      
Gross Amount, Land 3,902      
Gross Amount, Buildings and Fixtures 43,102      
Total 47,004      
Accumulated Depreciation (11,879)      
Net $ 35,125      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2006      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Reserve at Las Colinas | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,411      
Wholly Owned Properties - Residential | Remington Hills        
Real Estate And Accumulated Depreciation [Line Items]        
Location Irving, TX      
Initial Cost Land $ 4,390      
Initial Cost Buildings and Fixtures 21,822      
Gross Amount, Land 4,390      
Gross Amount, Buildings and Fixtures 34,395      
Total 38,785      
Accumulated Depreciation (10,890)      
Net $ 27,895      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Remington Hills | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 12,573      
Wholly Owned Properties - Residential | Colonial Village at Oakbend        
Real Estate And Accumulated Depreciation [Line Items]        
Location Lewisville, TX      
Initial Cost Land $ 5,598      
Initial Cost Buildings and Fixtures 28,616      
Gross Amount, Land 5,598      
Gross Amount, Buildings and Fixtures 34,316      
Total 39,914      
Accumulated Depreciation (11,122)      
Net $ 28,792      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Oakbend | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,700      
Wholly Owned Properties - Residential | Times Square at Craig Ranch        
Real Estate And Accumulated Depreciation [Line Items]        
Location McKinney, TX      
Initial Cost Land $ 1,130      
Initial Cost Buildings and Fixtures 28,058      
Gross Amount, Land 1,130      
Gross Amount, Buildings and Fixtures 33,716      
Total 34,846      
Accumulated Depreciation (12,315)      
Net $ 22,531      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Wholly Owned Properties - Residential | Times Square at Craig Ranch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,658      
Wholly Owned Properties - Residential | Venue at Stonebridge Ranch        
Real Estate And Accumulated Depreciation [Line Items]        
Location McKinney, TX      
Initial Cost Land $ 4,034      
Initial Cost Buildings and Fixtures 19,528      
Gross Amount, Land 4,034      
Gross Amount, Buildings and Fixtures 21,972      
Total 26,006      
Accumulated Depreciation (5,556)      
Net $ 20,450      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Venue at Stonebridge Ranch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,444      
Wholly Owned Properties - Residential | Cityscape at Market Center        
Real Estate And Accumulated Depreciation [Line Items]        
Location Plano, TX      
Initial Cost Land $ 16,894      
Initial Cost Buildings and Fixtures 110,705      
Gross Amount, Land 16,894      
Gross Amount, Buildings and Fixtures 114,781      
Total 131,675      
Accumulated Depreciation (17,834)      
Net $ 113,841      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2014      
Wholly Owned Properties - Residential | Cityscape at Market Center | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Wholly Owned Properties - Residential | Cityscape at Market Center | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
Wholly Owned Properties - Residential | Cityscape at Market Center | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,076      
Wholly Owned Properties - Residential | Highwood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Plano, TX      
Initial Cost Land $ 864      
Initial Cost Buildings and Fixtures 7,783      
Gross Amount, Land 864      
Gross Amount, Buildings and Fixtures 11,178      
Total 12,042      
Accumulated Depreciation (7,906)      
Net $ 4,136      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1983      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1998      
Wholly Owned Properties - Residential | Highwood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,395      
Wholly Owned Properties - Residential | Los Rios Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Plano, TX      
Initial Cost Land $ 3,273      
Initial Cost Buildings and Fixtures 28,823      
Gross Amount, Land 3,273      
Gross Amount, Buildings and Fixtures 35,938      
Total 39,211      
Accumulated Depreciation (20,443)      
Net $ 18,768      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2003      
Wholly Owned Properties - Residential | Los Rios Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,115      
Wholly Owned Properties - Residential | Boulder Ridge        
Real Estate And Accumulated Depreciation [Line Items]        
Location Roanoke, TX      
Initial Cost Land $ 3,382      
Initial Cost Buildings and Fixtures 26,930      
Gross Amount, Land 3,382      
Gross Amount, Buildings and Fixtures 33,980      
Total 37,362      
Accumulated Depreciation (17,563)      
Net $ 19,799      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2005      
Wholly Owned Properties - Residential | Boulder Ridge | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,050      
Wholly Owned Properties - Residential | Copper Ridge        
Real Estate And Accumulated Depreciation [Line Items]        
Location Roanoke, TX      
Initial Cost Land $ 3,336      
Gross Amount, Land 3,336      
Gross Amount, Buildings and Fixtures 22,762      
Total 26,098      
Accumulated Depreciation (7,161)      
Net $ 18,937      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2008      
Wholly Owned Properties - Residential | Copper Ridge | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 22,762      
Wholly Owned Properties - Residential | Copper Ridge II        
Real Estate And Accumulated Depreciation [Line Items]        
Location Roanoke, TX      
Initial Cost Land $ 830      
Gross Amount, Land 830      
Gross Amount, Buildings and Fixtures 25,427      
Total 26,257      
Accumulated Depreciation (1,012)      
Net $ 25,245      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2020      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2008      
Wholly Owned Properties - Residential | Copper Ridge II | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 25,427      
Wholly Owned Properties - Residential | Colonial Grand at Ashton Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location Round Rock, TX      
Initial Cost Land $ 5,511      
Initial Cost Buildings and Fixtures 36,241      
Gross Amount, Land 5,511      
Gross Amount, Buildings and Fixtures 38,902      
Total 44,413      
Accumulated Depreciation (12,248)      
Net $ 32,165      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Ashton Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,661      
Wholly Owned Properties - Residential | Colonial Grand at Round Rock        
Real Estate And Accumulated Depreciation [Line Items]        
Location Round Rock, TX      
Initial Cost Land $ 4,691      
Initial Cost Buildings and Fixtures 45,379      
Gross Amount, Land 4,691      
Gross Amount, Buildings and Fixtures 48,443      
Total 53,134      
Accumulated Depreciation (14,797)      
Net $ 38,337      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Grand at Round Rock | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,064      
Wholly Owned Properties - Residential | Colonial Village at Sierra Vista        
Real Estate And Accumulated Depreciation [Line Items]        
Location Round Rock, TX      
Initial Cost Land $ 2,561      
Initial Cost Buildings and Fixtures 16,488      
Gross Amount, Land 2,561      
Gross Amount, Buildings and Fixtures 20,778      
Total 23,339      
Accumulated Depreciation (7,251)      
Net $ 16,088      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Sierra Vista | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,290      
Wholly Owned Properties - Residential | Alamo Ranch        
Real Estate And Accumulated Depreciation [Line Items]        
Location San Antonio, TX      
Initial Cost Land $ 2,380      
Initial Cost Buildings and Fixtures 26,982      
Gross Amount, Land 2,380      
Gross Amount, Buildings and Fixtures 30,140      
Total 32,520      
Accumulated Depreciation (10,753)      
Net $ 21,767      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Alamo Ranch | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,158      
Wholly Owned Properties - Residential | Bulverde Oaks        
Real Estate And Accumulated Depreciation [Line Items]        
Location San Antonio, TX      
Initial Cost Land $ 4,257      
Initial Cost Buildings and Fixtures 36,759      
Gross Amount, Land 4,257      
Gross Amount, Buildings and Fixtures 38,555      
Total 42,812      
Accumulated Depreciation (6,544)      
Net $ 36,268      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2014      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2014      
Wholly Owned Properties - Residential | Bulverde Oaks | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,796      
Wholly Owned Properties - Residential | Haven at Blanco        
Real Estate And Accumulated Depreciation [Line Items]        
Location San Antonio, TX      
Initial Cost Land $ 5,450      
Initial Cost Buildings and Fixtures 45,958      
Gross Amount, Land 5,411      
Gross Amount, Buildings and Fixtures 49,898      
Total 55,309      
Accumulated Depreciation (14,877)      
Net $ 40,432      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Wholly Owned Properties - Residential | Haven at Blanco | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (39)      
Wholly Owned Properties - Residential | Haven at Blanco | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,940      
Wholly Owned Properties - Residential | Stone Ranch at Westover Hills        
Real Estate And Accumulated Depreciation [Line Items]        
Location San Antonio, TX      
Initial Cost Land $ 4,000      
Initial Cost Buildings and Fixtures 24,992      
Gross Amount, Land 4,000      
Gross Amount, Buildings and Fixtures 28,436      
Total 32,436      
Accumulated Depreciation (10,973)      
Net $ 21,463      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2009      
Wholly Owned Properties - Residential | Stone Ranch at Westover Hills | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,444      
Wholly Owned Properties - Residential | Cypresswood Court        
Real Estate And Accumulated Depreciation [Line Items]        
Location Spring, TX      
Initial Cost Land $ 576      
Initial Cost Buildings and Fixtures 5,190      
Gross Amount, Land 576      
Gross Amount, Buildings and Fixtures 10,066      
Total 10,642      
Accumulated Depreciation (6,274)      
Net $ 4,368      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Cypresswood Court | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,876      
Wholly Owned Properties - Residential | Villages at Kirkwood        
Real Estate And Accumulated Depreciation [Line Items]        
Location Stafford, TX      
Initial Cost Land $ 1,918      
Initial Cost Buildings and Fixtures 15,846      
Gross Amount, Land 1,918      
Gross Amount, Buildings and Fixtures 19,106      
Total 21,024      
Accumulated Depreciation (10,306)      
Net $ 10,718      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2004      
Wholly Owned Properties - Residential | Villages at Kirkwood | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,260      
Wholly Owned Properties - Residential | Green Tree Place        
Real Estate And Accumulated Depreciation [Line Items]        
Location Woodlands, TX      
Initial Cost Land $ 539      
Initial Cost Buildings and Fixtures 4,850      
Gross Amount, Land 539      
Gross Amount, Buildings and Fixtures 8,647      
Total 9,186      
Accumulated Depreciation (6,452)      
Net $ 2,734      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1994      
Wholly Owned Properties - Residential | Green Tree Place | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,797      
Wholly Owned Properties - Residential | Stonefield Commons        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlottesville, VA      
Initial Cost Land $ 11,044      
Initial Cost Buildings and Fixtures 36,689      
Gross Amount, Land 11,044      
Gross Amount, Buildings and Fixtures 38,428      
Total 49,472      
Accumulated Depreciation (6,655)      
Net $ 42,817      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2014      
Wholly Owned Properties - Residential | Stonefield Commons | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,739      
Wholly Owned Properties - Residential | Adalay Bay        
Real Estate And Accumulated Depreciation [Line Items]        
Location Chesapeake, VA      
Initial Cost Land $ 5,280      
Initial Cost Buildings and Fixtures 31,341      
Gross Amount, Land 5,280      
Gross Amount, Buildings and Fixtures 35,205      
Total 40,485      
Accumulated Depreciation (11,284)      
Net $ 29,201      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2002      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Wholly Owned Properties - Residential | Adalay Bay | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,864      
Wholly Owned Properties - Residential | Apartments at Cobblestone Square        
Real Estate And Accumulated Depreciation [Line Items]        
Location Fredericksburg, VA      
Initial Cost Land $ 10,990      
Initial Cost Buildings and Fixtures 48,696      
Gross Amount, Land 10,990      
Gross Amount, Buildings and Fixtures 51,731      
Total 62,721      
Accumulated Depreciation (9,495)      
Net $ 53,226      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Apartments at Cobblestone Square | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,035      
Wholly Owned Properties - Residential | Colonial Village at Greenbrier        
Real Estate And Accumulated Depreciation [Line Items]        
Location Fredericksburg, VA      
Initial Cost Land $ 4,842      
Initial Cost Buildings and Fixtures 21,677      
Gross Amount, Land 4,842      
Gross Amount, Buildings and Fixtures 24,603      
Total 29,445      
Accumulated Depreciation (6,988)      
Net $ 22,457      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1980      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Greenbrier | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,926      
Wholly Owned Properties - Residential | Seasons at Celebrate Virginia        
Real Estate And Accumulated Depreciation [Line Items]        
Location Fredericksburg, VA      
Initial Cost Land $ 14,490      
Initial Cost Buildings and Fixtures 32,083      
Gross Amount, Land 14,490      
Gross Amount, Buildings and Fixtures 72,659      
Total 87,149      
Accumulated Depreciation (17,743)      
Net $ 69,406      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2011      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Seasons at Celebrate Virginia | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 40,576      
Wholly Owned Properties - Residential | Station Square at Cosner's Corner        
Real Estate And Accumulated Depreciation [Line Items]        
Location Fredericksburg, VA      
Initial Cost Land $ 12,825      
Initial Cost Buildings and Fixtures 51,078      
Gross Amount, Land 12,825      
Gross Amount, Buildings and Fixtures 52,973      
Total 65,798      
Accumulated Depreciation (9,454)      
Net $ 56,344      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Station Square at Cosner's Corner | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Wholly Owned Properties - Residential | Station Square at Cosner's Corner | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2016      
Wholly Owned Properties - Residential | Station Square at Cosner's Corner | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,895      
Wholly Owned Properties - Residential | Colonial Village at Hampton Glen        
Real Estate And Accumulated Depreciation [Line Items]        
Location Glen Allen, VA      
Initial Cost Land $ 4,851      
Initial Cost Buildings and Fixtures 21,678      
Gross Amount, Land 4,851      
Gross Amount, Buildings and Fixtures 25,568      
Total 30,419      
Accumulated Depreciation (7,916)      
Net $ 22,503      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1986      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village at Hampton Glen | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,890      
Wholly Owned Properties - Residential | Colonial Village At West End        
Real Estate And Accumulated Depreciation [Line Items]        
Location Glen Allen, VA      
Initial Cost Land $ 4,661      
Initial Cost Buildings and Fixtures 18,908      
Gross Amount, Land 4,661      
Gross Amount, Buildings and Fixtures 22,111      
Total 26,772      
Accumulated Depreciation (6,900)      
Net $ 19,872      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At West End | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,203      
Wholly Owned Properties - Residential | Township        
Real Estate And Accumulated Depreciation [Line Items]        
Location Hampton, VA      
Initial Cost Land $ 1,509      
Initial Cost Buildings and Fixtures 8,189      
Gross Amount, Land 1,509      
Gross Amount, Buildings and Fixtures 16,799      
Total 18,308      
Accumulated Depreciation (11,803)      
Net $ 6,505      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1987      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 1995      
Wholly Owned Properties - Residential | Township | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 8,610      
Wholly Owned Properties - Residential | Colonial Village At Waterford        
Real Estate And Accumulated Depreciation [Line Items]        
Location Midlothian, VA      
Initial Cost Land $ 6,733      
Initial Cost Buildings and Fixtures 29,221      
Gross Amount, Land 6,733      
Gross Amount, Buildings and Fixtures 34,488      
Total 41,221      
Accumulated Depreciation (11,295)      
Net $ 29,926      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1989      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Waterford | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,267      
Wholly Owned Properties - Residential | Radius        
Real Estate And Accumulated Depreciation [Line Items]        
Location Newport News, VA      
Initial Cost Land $ 5,040      
Initial Cost Buildings and Fixtures 36,481      
Gross Amount, Land 5,040      
Gross Amount, Buildings and Fixtures 39,996      
Total 45,036      
Accumulated Depreciation (6,344)      
Net $ 38,692      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | Radius | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,515      
Wholly Owned Properties - Residential | Ashley Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Richmond, VA      
Initial Cost Land $ 4,761      
Initial Cost Buildings and Fixtures 13,365      
Gross Amount, Land 4,761      
Gross Amount, Buildings and Fixtures 16,325      
Total 21,086      
Accumulated Depreciation (5,791)      
Net $ 15,295      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1988      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Ashley Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,960      
Wholly Owned Properties - Residential | Colonial Village At Chase Gayton        
Real Estate And Accumulated Depreciation [Line Items]        
Location Richmond, VA      
Initial Cost Land $ 6,021      
Initial Cost Buildings and Fixtures 29,004      
Gross Amount, Land 6,021      
Gross Amount, Buildings and Fixtures 33,213      
Total 39,234      
Accumulated Depreciation (10,660)      
Net $ 28,574      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1984      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Wholly Owned Properties - Residential | Colonial Village At Chase Gayton | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,209      
Wholly Owned Properties - Residential | Hamptons At Hunton Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Richmond, VA      
Initial Cost Land $ 4,930      
Initial Cost Buildings and Fixtures 35,598      
Gross Amount, Land 4,930      
Gross Amount, Buildings and Fixtures 41,868      
Total 46,798      
Accumulated Depreciation (13,740)      
Net $ 33,058      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2011      
Wholly Owned Properties - Residential | Hamptons At Hunton Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 6,270      
Wholly Owned Properties - Residential | Retreat At West Creek        
Real Estate And Accumulated Depreciation [Line Items]        
Location Richmond, VA      
Initial Cost Land $ 7,112      
Initial Cost Buildings and Fixtures 36,136      
Gross Amount, Land 7,112      
Gross Amount, Buildings and Fixtures 38,947      
Total 46,059      
Accumulated Depreciation (5,868)      
Net $ 40,191      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | Retreat At West Creek | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,811      
Wholly Owned Properties - Residential | Retreat At West Creek I I        
Real Estate And Accumulated Depreciation [Line Items]        
Location Richmond, VA      
Initial Cost Land $ 3,000      
Gross Amount, Land 3,000      
Gross Amount, Buildings and Fixtures 12,242      
Total 15,242      
Accumulated Depreciation (1,165)      
Net $ 14,077      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Wholly Owned Properties - Residential | Retreat At West Creek I I | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 12,242      
Wholly Owned Properties - Residential | Post Carlyle Square        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 29,728      
Initial Cost Buildings and Fixtures 154,309      
Gross Amount, Land 29,728      
Gross Amount, Buildings and Fixtures 158,335      
Total 188,063      
Accumulated Depreciation (24,500)      
Net $ 163,563      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Carlyle Square | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2006      
Wholly Owned Properties - Residential | Post Carlyle Square | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Wholly Owned Properties - Residential | Post Carlyle Square | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,026      
Wholly Owned Properties - Residential | Post Corners At Trinity Center        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 7,664      
Initial Cost Buildings and Fixtures 70,012      
Gross Amount, Land 7,664      
Gross Amount, Buildings and Fixtures 72,430      
Total 80,094      
Accumulated Depreciation (11,401)      
Net $ 68,693      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Corners At Trinity Center | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,418      
Wholly Owned Properties - Residential | Post Fallsgrove        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 17,524      
Initial Cost Buildings and Fixtures 58,896      
Gross Amount, Land 17,524      
Gross Amount, Buildings and Fixtures 62,573      
Total 80,097      
Accumulated Depreciation (10,264)      
Net $ 69,833      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2003      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Fallsgrove | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 3,677      
Wholly Owned Properties - Residential | Post Park        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 5,355      
Initial Cost Buildings and Fixtures 79,842      
Gross Amount, Land 5,355      
Gross Amount, Buildings and Fixtures 82,394      
Total 87,749      
Accumulated Depreciation (16,666)      
Net $ 71,083      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Park | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,552      
Wholly Owned Properties - Residential | Post Pentagon Row        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 30,452      
Initial Cost Buildings and Fixtures 125,091      
Gross Amount, Land 30,452      
Gross Amount, Buildings and Fixtures 136,451      
Total 166,903      
Accumulated Depreciation (21,740)      
Net $ 145,163      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2001      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Pentagon Row | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 11,360      
Wholly Owned Properties - Residential | Post Tysons Corner        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 30,776      
Initial Cost Buildings and Fixtures 82,021      
Gross Amount, Land 30,776      
Gross Amount, Buildings and Fixtures 87,152      
Total 117,928      
Accumulated Depreciation (13,561)      
Net $ 104,367      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1990      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Wholly Owned Properties - Residential | Post Tysons Corner | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,131      
Retail Properties | The Denton [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Kansas City, MO      
Initial Cost Land $ 700      
Initial Cost Buildings and Fixtures 4,439      
Gross Amount, Land 700      
Gross Amount, Buildings and Fixtures 5,170      
Total 5,870      
Accumulated Depreciation (808)      
Net $ 5,062      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2014      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2015      
Retail Properties | The Denton [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 731      
Retail Properties | The Greene [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Greenville, SC      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2019      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2019      
Retail Properties | Colonial Promenade at Huntsville Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Huntsville, AL      
Initial Cost Land $ 1,748      
Gross Amount, Land 448      
Total 448      
Net $ 448      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2017      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2013      
Retail Properties | Colonial Promenade at Huntsville Retail | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (1,300)      
Retail Properties | 220 Riverside Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Jacksonville, FL      
Initial Cost Land $ 119      
Initial Cost Buildings and Fixtures 2,902      
Gross Amount, Land 119      
Gross Amount, Buildings and Fixtures 3,133      
Total 3,252      
Accumulated Depreciation (149)      
Net $ 3,103      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2015      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2019      
Retail Properties | 220 Riverside Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 231      
Retail Properties | Post Parkside Orlando Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 742      
Initial Cost Buildings and Fixtures 11,924      
Gross Amount, Land 742      
Gross Amount, Buildings and Fixtures 13,137      
Total 13,879      
Accumulated Depreciation (2,131)      
Net $ 11,748      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Parkside Orlando Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,213      
Retail Properties | Post Harbour Place Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 386      
Initial Cost Buildings and Fixtures 4,315      
Gross Amount, Land 386      
Gross Amount, Buildings and Fixtures 4,676      
Total 5,062      
Accumulated Depreciation (738)      
Net $ 4,324      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Harbour Place Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 361      
Retail Properties | Post Rocky Point Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 34      
Initial Cost Buildings and Fixtures 51      
Gross Amount, Land 34      
Gross Amount, Buildings and Fixtures 449      
Total 483      
Accumulated Depreciation (147)      
Net $ 336      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Rocky Point Retail | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1994      
Retail Properties | Post Rocky Point Retail | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
Retail Properties | Post Rocky Point Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 398      
Retail Properties | Post Soho Square Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Tampa, FL      
Initial Cost Land $ 268      
Initial Cost Buildings and Fixtures 4,033      
Gross Amount, Land 268      
Gross Amount, Buildings and Fixtures 4,046      
Total 4,314      
Accumulated Depreciation (893)      
Net $ 3,421      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Soho Square Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 13      
Retail Properties | M A A Buckhead Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 867      
Initial Cost Buildings and Fixtures 3,465      
Gross Amount, Land 867      
Gross Amount, Buildings and Fixtures 4,267      
Total 5,134      
Accumulated Depreciation (1,077)      
Net $ 4,057      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2012      
Retail Properties | M A A Buckhead Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 802      
Retail Properties | M A A Piedmont Park Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 426      
Initial Cost Buildings and Fixtures 1,089      
Gross Amount, Land 426      
Gross Amount, Buildings and Fixtures 1,110      
Total 1,536      
Accumulated Depreciation (195)      
Net $ 1,341      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Piedmont Park Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 21      
Retail Properties | M A A Riverside Office        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 9,680      
Initial Cost Buildings and Fixtures 22,108      
Gross Amount, Land 9,680      
Gross Amount, Buildings and Fixtures 31,215      
Total 40,895      
Accumulated Depreciation (6,079)      
Net $ 34,816      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Riverside Office | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9,107      
Retail Properties | M A A Riverside Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 889      
Initial Cost Buildings and Fixtures 2,340      
Gross Amount, Land 889      
Gross Amount, Buildings and Fixtures 4,914      
Total 5,803      
Accumulated Depreciation (694)      
Net $ 5,109      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Riverside Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 2,574      
Retail Properties | Post Training Facility        
Real Estate And Accumulated Depreciation [Line Items]        
Location Atlanta, GA      
Initial Cost Land $ 1,092      
Initial Cost Buildings and Fixtures 968      
Gross Amount, Land 1,092      
Gross Amount, Buildings and Fixtures 1,000      
Total 2,092      
Accumulated Depreciation (325)      
Net $ 1,767      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1999      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Training Facility | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 32      
Retail Properties | M A A West Village Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Smyrna, GA      
Initial Cost Land $ 2,500      
Initial Cost Buildings and Fixtures 8,446      
Gross Amount, Land 3,408      
Gross Amount, Buildings and Fixtures 9,946      
Total 13,354      
Accumulated Depreciation (2,109)      
Net $ 11,245      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2012      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2014      
Retail Properties | M A A West Village Retail | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 908      
Retail Properties | M A A West Village Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,500      
Retail Properties | M A A1225 Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 43      
Initial Cost Buildings and Fixtures 199      
Gross Amount, Land 52      
Gross Amount, Buildings and Fixtures 441      
Total 493      
Accumulated Depreciation (157)      
Net $ 336      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Retail Properties | M A A1225 Retail | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 9      
Retail Properties | M A A1225 Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 242      
Retail Properties | M A A Gateway Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 318      
Initial Cost Buildings and Fixtures 1,430      
Gross Amount, Land 318      
Gross Amount, Buildings and Fixtures 1,456      
Total 1,774      
Accumulated Depreciation (280)      
Net $ 1,494      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Gateway Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 26      
Retail Properties | M A A South Line Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 470      
Initial Cost Buildings and Fixtures 1,289      
Gross Amount, Land 470      
Gross Amount, Buildings and Fixtures 1,411      
Total 1,881      
Accumulated Depreciation (271)      
Net $ 1,610      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A South Line Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 122      
Retail Properties | M A A Uptown Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 319      
Initial Cost Buildings and Fixtures 1,144      
Gross Amount, Land 319      
Gross Amount, Buildings and Fixtures 1,155      
Total 1,474      
Accumulated Depreciation (199)      
Net $ 1,275      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Uptown Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 11      
Retail Properties | Post Uptown Leasing Center        
Real Estate And Accumulated Depreciation [Line Items]        
Location Charlotte, NC      
Initial Cost Land $ 1,290      
Initial Cost Buildings and Fixtures 1,488      
Gross Amount, Land 1,290      
Gross Amount, Buildings and Fixtures 1,634      
Total 2,924      
Accumulated Depreciation (258)      
Net $ 2,666      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Uptown Leasing Center | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 146      
Retail Properties | Hue Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Buildings and Fixtures $ 2,129      
Gross Amount, Buildings and Fixtures 2,193      
Total 2,193      
Accumulated Depreciation (177)      
Net $ 2,016      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2018      
Retail Properties | Hue Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 64      
Retail Properties | Post Parkside At Wade Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Raleigh, NC      
Initial Cost Land $ 317      
Initial Cost Buildings and Fixtures 4,552      
Gross Amount, Land 317      
Gross Amount, Buildings and Fixtures 4,636      
Total 4,953      
Accumulated Depreciation (1,009)      
Net $ 3,944      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2011      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Parkside At Wade Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 84      
Retail Properties | Post South Lamar Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Initial Cost Land $ 421      
Initial Cost Buildings and Fixtures 3,072      
Gross Amount, Land 421      
Gross Amount, Buildings and Fixtures 3,646      
Total 4,067      
Accumulated Depreciation (567)      
Net $ 3,500      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2011      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post South Lamar Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 574      
Retail Properties | M A A Frisco Bridges Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 779      
Initial Cost Buildings and Fixtures 6,593      
Gross Amount, Land 779      
Gross Amount, Buildings and Fixtures 7,261      
Total 8,040      
Accumulated Depreciation (1,335)      
Net $ 6,705      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Frisco Bridges Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 668      
Retail Properties | M A A Mc Kinney Avenue Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 1,581      
Initial Cost Buildings and Fixtures 5,982      
Gross Amount, Land 1,581      
Gross Amount, Buildings and Fixtures 6,267      
Total 7,848      
Accumulated Depreciation (1,052)      
Net $ 6,796      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1996      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Mc Kinney Avenue Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 285      
Retail Properties | M A A Worthington Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 108      
Initial Cost Buildings and Fixtures 495      
Gross Amount, Land 108      
Gross Amount, Buildings and Fixtures 865      
Total 973      
Accumulated Depreciation (107)      
Net $ 866      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | M A A Worthington Retail | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1993      
Retail Properties | M A A Worthington Retail | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
Retail Properties | M A A Worthington Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 370      
Retail Properties | Post Addison Circle Office        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 1,395      
Initial Cost Buildings and Fixtures 4,280      
Gross Amount, Land 1,395      
Gross Amount, Buildings and Fixtures 5,108      
Total 6,503      
Accumulated Depreciation (1,257)      
Net $ 5,246      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Addison Circle Office | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
Retail Properties | Post Addison Circle Office | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
Retail Properties | Post Addison Circle Office | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 828      
Retail Properties | Post Addison Circle Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 448      
Initial Cost Buildings and Fixtures 21,386      
Gross Amount, Land 448      
Gross Amount, Buildings and Fixtures 23,337      
Total 23,785      
Accumulated Depreciation (4,583)      
Net $ 19,202      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Addison Circle Retail | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
Retail Properties | Post Addison Circle Retail | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
Retail Properties | Post Addison Circle Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 1,951      
Retail Properties | Post Coles Corner Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 347      
Initial Cost Buildings and Fixtures 716      
Gross Amount, Land 347      
Gross Amount, Buildings and Fixtures 791      
Total 1,138      
Accumulated Depreciation (159)      
Net $ 979      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1998      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Coles Corner Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 75      
Retail Properties | Post Eastside Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 682      
Initial Cost Buildings and Fixtures 10,645      
Gross Amount, Land 682      
Gross Amount, Buildings and Fixtures 11,042      
Total 11,724      
Accumulated Depreciation (1,866)      
Net $ 9,858      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2008      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Eastside Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 397      
Retail Properties | Post Heights Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 1,066      
Initial Cost Buildings and Fixtures 3,314      
Gross Amount, Land 1,066      
Gross Amount, Buildings and Fixtures 3,466      
Total 4,532      
Accumulated Depreciation (615)      
Net $ 3,917      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1997      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Heights Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 152      
Retail Properties | Post Katy Trail Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 465      
Initial Cost Buildings and Fixtures 4,883      
Gross Amount, Land 465      
Gross Amount, Buildings and Fixtures 4,964      
Total 5,429      
Accumulated Depreciation (783)      
Net $ 4,646      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2010      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Katy Trail Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 81      
Retail Properties | Post Legacy Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 150      
Initial Cost Buildings and Fixtures 3,334      
Gross Amount, Land 150      
Gross Amount, Buildings and Fixtures 3,712      
Total 3,862      
Accumulated Depreciation (569)      
Net $ 3,293      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2000      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Legacy Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 378      
Retail Properties | Post Midtown Square Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 1,327      
Initial Cost Buildings and Fixtures 16,005      
Gross Amount, Land 1,327      
Gross Amount, Buildings and Fixtures 16,377      
Total 17,704      
Accumulated Depreciation (2,614)      
Net $ 15,090      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Midtown Square Retail | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1993      
Retail Properties | Post Midtown Square Retail | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Retail Properties | Post Midtown Square Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 372      
Retail Properties | Rise Condo Devel L P Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Buildings and Fixtures $ 2,280      
Gross Amount, Buildings and Fixtures 2,336      
Total 2,336      
Accumulated Depreciation (397)      
Net $ 1,939      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Rise Condo Devel L P Retail | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 1993      
Retail Properties | Rise Condo Devel L P Retail | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2013      
Retail Properties | Rise Condo Devel L P Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 56      
Retail Properties | Bella Casita At Las Colinas Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Irving, TX      
Initial Cost Land $ 46      
Initial Cost Buildings and Fixtures 186      
Gross Amount, Land 46      
Gross Amount, Buildings and Fixtures 362      
Total 408      
Accumulated Depreciation (118)      
Net $ 290      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Retail Properties | Bella Casita At Las Colinas Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 176      
Retail Properties | Times Square At Craig Ranch Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location McKinney, TX      
Initial Cost Land $ 253      
Initial Cost Buildings and Fixtures 1,310      
Gross Amount, Land 253      
Gross Amount, Buildings and Fixtures 5,320      
Total 5,573      
Accumulated Depreciation (940)      
Net $ 4,633      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2009      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2010      
Retail Properties | Times Square At Craig Ranch Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 4,010      
Retail Properties | Post Carlyle Square Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 1,048      
Initial Cost Buildings and Fixtures 7,930      
Gross Amount, Land 1,048      
Gross Amount, Buildings and Fixtures 7,987      
Total 9,035      
Accumulated Depreciation (1,315)      
Net $ 7,720      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Post Carlyle Square Retail | Phase I [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2006      
Retail Properties | Post Carlyle Square Retail | Phase II [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2016      
Retail Properties | Post Carlyle Square Retail | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 57      
Retail Properties | Post Park Maryland Retail        
Real Estate And Accumulated Depreciation [Line Items]        
Location Washington D.C.      
Initial Cost Land $ 25      
Initial Cost Buildings and Fixtures 137      
Gross Amount, Land 25      
Gross Amount, Buildings and Fixtures 137      
Total 162      
Accumulated Depreciation (19)      
Net $ 143      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date of Construction Dec. 31, 2007      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Retail Properties | Total Retail Commercial Properties        
Real Estate And Accumulated Depreciation [Line Items]        
Initial Cost Land $ 32,349      
Initial Cost Buildings and Fixtures 170,859      
Gross Amount, Land 31,966      
Gross Amount, Buildings and Fixtures 198,967      
Total 230,933      
Accumulated Depreciation (35,992)      
Net 194,941      
Retail Properties | Total Retail Commercial Properties | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition (383)      
Retail Properties | Total Retail Commercial Properties | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 28,108      
Development Properties [Member] | Novel Val Vista [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Gilbert, AZ      
Gross Amount, Land $ 7,284      
Gross Amount, Buildings and Fixtures 5,670      
Total 12,954      
Net $ 12,954      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2020      
Development Properties [Member] | Novel Val Vista [Member] | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 7,284      
Development Properties [Member] | Novel Val Vista [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,670      
Development Properties [Member] | Novel Midtown        
Real Estate And Accumulated Depreciation [Line Items]        
Location Phoenix, AZ      
Initial Cost Land $ 9,381      
Gross Amount, Land 9,381      
Gross Amount, Buildings and Fixtures 62,922      
Total 72,303      
Net $ 72,303      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2019      
Development Properties [Member] | Novel Midtown | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 62,922      
Development Properties [Member] | MAA Frisco Bridges II        
Real Estate And Accumulated Depreciation [Line Items]        
Location Dallas, TX      
Initial Cost Land $ 6,100      
Gross Amount, Land 6,100      
Gross Amount, Buildings and Fixtures 59,145      
Total 65,245      
Accumulated Depreciation (1,049)      
Net $ 64,196      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2016      
Development Properties [Member] | MAA Frisco Bridges II | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 59,145      
Development Properties [Member] | M A A Westglenn        
Real Estate And Accumulated Depreciation [Line Items]        
Location Denver, CO      
Initial Cost Land $ 8,077      
Gross Amount, Land 8,077      
Gross Amount, Buildings and Fixtures 39,715      
Total 47,792      
Net $ 47,792      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2018      
Development Properties [Member] | M A A Westglenn | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 39,715      
Development Properties [Member] | M A A Robinson        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 6,004      
Gross Amount, Land 6,004      
Gross Amount, Buildings and Fixtures 62,714      
Total 68,718      
Net $ 68,718      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2018      
Development Properties [Member] | M A A Robinson | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 62,714      
Development Properties [Member] | MAA Windmill Hill [Member]        
Real Estate And Accumulated Depreciation [Line Items]        
Location Austin, TX      
Gross Amount, Land $ 5,006      
Gross Amount, Buildings and Fixtures 5,131      
Total 10,137      
Net $ 10,137      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2020      
Development Properties [Member] | MAA Windmill Hill [Member] | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,006      
Development Properties [Member] | MAA Windmill Hill [Member] | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 5,131      
Development Properties [Member] | Sand Lake        
Real Estate And Accumulated Depreciation [Line Items]        
Location Orlando, FL      
Initial Cost Land $ 7,704      
Gross Amount, Land 7,635      
Gross Amount, Buildings and Fixtures 35,224      
Total 42,859      
Net $ 42,859      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2019      
Development Properties [Member] | Sand Lake | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ (69)      
Development Properties [Member] | Sand Lake | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 35,224      
Development Properties [Member] | Longpoint        
Real Estate And Accumulated Depreciation [Line Items]        
Location Houston, TX      
Initial Cost Land $ 9,031      
Gross Amount, Land 9,031      
Gross Amount, Buildings and Fixtures 22,206      
Total 31,237      
Net $ 31,237      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Date Acquired Dec. 31, 2018      
Development Properties [Member] | Longpoint | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 22,206      
Development Properties [Member] | Total Active Development Properties        
Real Estate And Accumulated Depreciation [Line Items]        
Initial Cost Land 46,297      
Gross Amount, Land 58,518      
Gross Amount, Buildings and Fixtures 292,727      
Total 351,245      
Accumulated Depreciation (1,049)      
Net 350,196      
Development Properties [Member] | Total Active Development Properties | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 12,221      
Development Properties [Member] | Total Active Development Properties | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 292,727      
Real Estate [Member] | Total Properties        
Real Estate And Accumulated Depreciation [Line Items]        
Encumbrances 6,588      
Initial Cost Land 1,899,554      
Initial Cost Buildings and Fixtures 10,112,798      
Gross Amount, Land 1,916,609      
Gross Amount, Buildings and Fixtures 12,315,534      
Total 14,232,143      
Accumulated Depreciation (3,397,690)      
Net 10,834,453      
Real Estate [Member] | Total Properties | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 17,055      
Real Estate [Member] | Total Properties | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 2,202,736      
Land Improvements | Total Land Held For Future Developments        
Real Estate And Accumulated Depreciation [Line Items]        
Initial Cost Land 60,993      
Gross Amount, Land 60,993      
Total 60,993      
Net 60,993      
Corporate Real Estate Owned Domain | Corporate Properties        
Real Estate And Accumulated Depreciation [Line Items]        
Gross Amount, Buildings and Fixtures 30,791      
Total 30,791      
Accumulated Depreciation (17,357)      
Net 13,434      
Corporate Real Estate Owned Domain | Corporate Properties | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 30,791      
Other Real Estate Owned | Total Other        
Real Estate And Accumulated Depreciation [Line Items]        
Initial Cost Land 60,993      
Gross Amount, Land 73,565      
Gross Amount, Buildings and Fixtures 33,187      
Total 106,752      
Accumulated Depreciation (17,415)      
Net 89,337      
Other Real Estate Owned | Total Other | Land        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition 12,572      
Other Real Estate Owned | Total Other | Buildings and Fixtures        
Real Estate And Accumulated Depreciation [Line Items]        
Costs Capitalized Subsequent to Acquisition $ 33,187