Equity - Schedule of Other Common Stock Activities (Details) - Common Stock - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Dividend Reinvestment and Stock Purchase Plan (in shares)	336	237	983
Conversion of DownREIT units (in shares)	213	3	78
Exercise of stock options (in shares)	152	120	32
Vesting of restricted stock units (in shares)	468	401	419
Repurchase of common stock (in shares)	162	141	157