Investment in Unconsolidated Entities - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Mar. 31, 2017
Vantage At Panama City Beach [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from equity commitments				$ 11.7
Vantage At Stone Creek [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from equity commitments			$ 7.1
Vantage At Bulverde [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from equity commitments			$ 8.6
Vantage at Germantown [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from equity commitments		$ 10.4
Vantage At Coventry [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from equity commitments	$ 8.1
Vantage At Murfreesboro [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from equity commitments	$ 12.2