Acquisitions and Dispositions	3 Months Ended
Acquisitions and Dispositions	Mar. 31, 2015
Acquisitions and Dispositions [Abstract]
Acquisitions and Dispositions	5. Acquisitions and Dispositions Acquisition of Land. We did not acquire any land in the first quarter of 2015. In January 2014, we acquired approximately 2.9 acres of land located in Houston, Texas for approximately $15.6 million. In April 2015, we signed an agreement to acquire approximately 50.0 acres of land located in Phoenix, Arizona for approximately $36.3 million. Acquisition of Non-Controlling Ownership Interest. In March 2015, we purchased the remaining 0.01% non-controlling interest in two fully consolidated joint ventures, which own an aggregate 798 units located in College Park, Maryland and Irvine, California, for approximately $9.5 million. The acquisitions of the remaining ownership interest were recorded as equity transactions and, as a result, the carrying balances of the non-controlling interest were eliminated and the remaining difference between the purchase price and carrying balance was recorded as a reduction in additional paid-in capital. See Note 13, "Non-controlling Interests," for the effect of changes in ownership interests of these joint ventures on the equity attributable to common shareholders. Land Holding Dispositions. In March 2015, we sold a land holding adjacent to an operating property in Dallas, Texas for approximately $0.4 million and recognized a gain of approximately $0.1 million. In March 2014, we sold approximately 3.0 acres of land adjacent to a development community in Atlanta, Georgia for approximately $6.3 million and recognized a gain of approximately $0.4 million. Sale of Operating Properties. In January 2015, we sold two operating properties, which were included in properties held for sale at December 31, 2014, comprised of 1,116 apartment homes located in Tampa, Florida and Austin, Texas for approximately $114.4 million and we recognized a gain of approximately $85.1 million relating to these property sales.

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, and assets held for sale. The tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregated would be included in this disclosure. Additionally, the entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity.

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