Investment in an Unconsolidated Entity (Details)	12 Months Ended
Dec. 31, 2016 commitment
Vantage at Corpus Christi and Vantage at Waco and Vantage at Boerne [Member]
Schedule Of Equity Method Investments [Line Items]
Number of investment equity commitments	3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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