Business of Organization - Schedule of Properties Under Development or Construction (Details) - Multifamily	Mar. 31, 2017
Town Center Phase VI
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Harding Place
Business And Organization [Line Items]
Ownership interest percentage in properties	80.00%
595 King Street
Business And Organization [Line Items]
Ownership interest percentage in properties	92.50%