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Segment Information - Additional Information (Details)
 12 Months Ended
Dec. 31, 2019
Communitie
State
Segment
Segment Reporting Information [Line Items]  
Number of owned or owned interests of apartment communities | Communitie 299
Number of States in which Entity Operates | State 16
Number of reportable segments | Segment 2
Period properties owned and stabilized 12 months
Occupancy Level for Stabilized Communities 90.00%
Period Properties Stabilized 90 days
Same Store [Member]  
Segment Reporting Information [Line Items]  
Period properties owned and stabilized 12 months