Organization, Basis of Presentation and Significant Accounting Policies (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) state community home	Jun. 30, 2016 USD ($)
Payments related to tax withholding for share-based compensation | $	$ 10,441	$ 7,659
Organization and Basis of Presentation
Number of operating apartment communities | community	264
Number of apartment homes included in operating apartment communities owned | home	76,158
Number of states where operating apartment communities owned are located | state	10
Number of communities with apartments under reconstruction | community	9
Number of apartment homes under reconstruction | home	2,900
Number of owned communities under construction | community	23
Expected number of apartment homes under construction | home	6,965
Communities under development rights | community	25
Estimated number of apartment homes in communities to be developed | home	8,329
Accounting Standards Update 2016-09 | Restatement Adjustment
Payments related to tax withholding for share-based compensation | $		$ 7,659