Business and Organization - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended															1 Months Ended
	May 13, 2013 Parcels Property	May 13, 2013 IPO	May 22, 2013 Underwriters Exercise Of Overallotment Option	May 13, 2013 Subsidiaries	Jun. 30, 2013 Subsidiaries Real estate properties Property	Jun. 30, 2013 Subsidiaries Real estate properties Office real estate Property	Jun. 30, 2013 Subsidiaries Real estate properties Retail real estate Property	Jun. 30, 2013 Subsidiaries Real estate properties Multifamily residential real estate Property	Jun. 30, 2013 Subsidiaries Development Pipeline Property	Jun. 30, 2013 Subsidiaries Development Pipeline Office real estate Property	Jun. 30, 2013 Subsidiaries Development Pipeline Retail real estate Property	Jun. 30, 2013 Subsidiaries Development Pipeline Multifamily residential real estate Property	May 13, 2013 Equity Method Investments	Jun. 30, 2013 Equity Method Investments Retail real estate Property	Jun. 30, 2013 Equity Method Investments Multifamily residential real estate Property	May 13, 2013 Operating Partnership
Real Estate Properties [Line Items]
Number of properties					22	7	14	1	6	2	2	2		1	1
Common stock, shares issued		16,525,000	2,478,750
Common stock, purchase price		$ 11.50	$ 11.50
Proceeds from Initial Public Offering	$ 203.2
Operating partnership payment of outstanding indebtedness																150.0
Consideration paid to prior investors																$ 47.2
Options to acquire developeable lands, number of parcels of developable land to be acquired	9
Interest acquired	100.00%			100.00%									100.00%
Number Of Units to be purchased under purchase agreement	197