Acquisitions, Dispositions, Impairment, and Discontinued Operations	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Acquisitions, Dispositions, Assets Held For Sale and Impairment	7. Acquisitions and Dispositions Asset Acquisition of Operating Properties. We did not acquire any operating properties during the year ended December 31, 2020. In December 2019, we acquired one operating property comprised of 186 apartment homes in Raleigh, North Carolina for approximately $75.1 million, and one operating property comprised of 552 apartment homes in Houston, Texas for approximately $147.2 million. We also acquired one operating property comprised of 326 apartment homes located in Austin, Texas for approximately $120.4 million in May 2019, and one operating property comprised of 316 apartment homes located in Scottsdale, Arizona for approximately $97.1 million in February 2019. In 2018, we acquired one operating property comprised of 299 apartment homes located in Orlando, Florida, for approximately $89.8 million in September, one operating property comprised of 333 apartment homes located in Orlando, Florida, for approximately $81.4 million in February and one operating property comprised of 358 apartment homes located in St. Petersburg, Florida, for approximately $126.9 million in January. Acquisitions of Land. During the year ended December 31, 2020, we acquired approximately 4.1 acres of land in Durham, North Carolina for approximately $27.6 million for the future development of approximately 354 apartment homes. We also acquired approximately 4.9 acres of land in Raleigh, North Carolina for approximately $18.2 million for the future development of approximately 355 apartment homes. In connection with the acquisition of the operating property in Houston, Texas in December 2019, we acquired approximately 2.3 acres of land adjacent to the operating property for approximately $8.0 million for the future development of approximately 300 apartment homes. During the year-ended December 31, 2019, we also acquired approximately 11.6 acres of land in Tempe, Arizona for approximately $18.0 million for the development of 397 apartment homes and approximately 4.3 acres of land in Charlotte, North Carolina for approximately $10.9 million for the development of 387 apartment homes. During the year ended December 31, 2018, we acquired approximately 1.8 acres of land in Orlando, Florida for approximately $11.4 million for the development of a community with 360 apartment homes. Land Holding Dispositions. During the year ended December 31, 2020, we sold approximately 4.7 acres of land adjacent to one of our operating properties in Raleigh, North Carolina for approximately $0.8 million and recognized a gain of $0.4 million. During the year ended December 31, 2018, we sold approximately 14.1 acres of land adjacent to two development properties in Phoenix, Arizona for approximately $11.5 million. Sale of Operating Properties. We did not sell any operating properties during the years ended December 31, 2020 or 2018. During the fourth quarter of 2019, we sold our remaining three operating properties in Corpus Christi, Texas. The operating properties sold included two consolidated communities comprised of 632 apartment homes and one joint venture community comprised of 270 apartment homes. The total net proceeds recognized from the disposition of the two consolidated communities was approximately $69.4 million and we recognized a gain of approximately $49.9 million. See Note 8, "Investments in Joint Ventures" for further discussion of the joint venture community.