Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		0 Months Ended		3 Months Ended	0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Jan. 17, 2014 Liberty Apartments [Member]	Feb. 18, 2014 Dividend Declared [Member]	Mar. 31, 2014 Dividend Declared [Member]	Jan. 09, 2014 Dividend Paid [Member] Common Stockholders [Member]	Jan. 09, 2014 Dividend Paid [Member] Common Unitholders [Member]	May 09, 2014 Subsequent Event [Member] Dividend Declared [Member]	Apr. 10, 2014 Subsequent Event [Member] Dividend Paid [Member] Common Stockholders [Member]	Apr. 10, 2014 Subsequent Event [Member] Dividend Paid [Member] Common Unitholders [Member]
Class of Stock [Line Items]
Authorized capital shares of common stock	500,000,000	500,000,000
Authorized capital shares of preferred stock	100,000,000	100,000,000
Shares of common stock issued	19,254,365	19,163,413
Shares of common stock outstanding	19,254,365	19,163,413
Preferred stock issued	0	0
Preferred stock outstanding	0	0
Percentage of Operating Partnership held	58.20%	59.50%
Acquisition, common units issued			695,652
Common units in exchange for all noncontrolling interests	30,000
Aggregate cash dividends and distributions, paid	$ 5,155					$ 3,100	$ 2,100		$ 3,100	$ 2,200
Cash dividend/distribution, date declared					Feb. 18, 2014			May 09, 2014
Cash dividend/distribution per share, declared	$ 0.16			$ 0.16				$ 0.16
Cash dividend/distribution, date payable					Apr. 10, 2014			Jul. 10, 2014
Cash dividend/distribution, date of record					Apr. 01, 2014			Jul. 01, 2014