Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands								3 Months Ended
	May. 02, 2016	Apr. 14, 2016	Apr. 07, 2016	Jan. 31, 2016	Jan. 07, 2016	Jul. 10, 2015	May. 05, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Class of Stock
Authorized capital shares of common stock								500,000,000		500,000,000
Authorized capital shares of preferred stock								100,000,000		100,000,000
Common Stock, Shares, Issued								31,094,560		30,076,359
Common Stock, Shares, Outstanding								31,094,560		30,076,359
Preferred stock issued								0		0
Preferred stock outstanding								0		0
Percentage of Operating Partnership held								66.40%		65.60%
Aggregate cash dividends and distributions, paid								$ 7,621	$ 6,368
Cash dividend per share, declared								$ 0.18	$ 0.17
Class A units
Class of Stock
Class A Units not held by Company								14,751,986
Common Stock
Class of Stock
Shares issued through public offering								937,404
Common Stock, Shares, Outstanding								31,094,560		30,076,359
Aggregate cash dividends and distributions, paid					$ 5,100
Common Stock | Subsequent Event
Class of Stock
Aggregate cash dividends and distributions, paid			$ 5,600
Operating Partnership | Class A units
Class of Stock
Aggregate cash dividends and distributions, paid					$ 2,500
Operating Partnership | Class A units | Subsequent Event
Class of Stock
Aggregate cash dividends and distributions, paid			$ 2,700
Operating Partnership | Columbus Village | Class B units
Class of Stock
Acquisition, common units/shares issued or to be issued						1,000,000
Operating Partnership | Columbus Village | Class C units
Class of Stock
Acquisition, common units/shares issued or to be issued						275,000
Dividend Declared
Class of Stock
Cash dividend per share, declared				$ 0.18
Cash dividend, date of record				Mar. 30, 2016
Dividend Declared | Subsequent Event
Class of Stock
Cash dividend per share, declared	$ 0.18
Cash dividend, date of record	Jun. 29, 2016
ATM Program | Common Stock
Class of Stock
Maximum aggregate offering price of shares to be sold							$ 50,000
Shares issued through public offering								937,404
Numbers shares issued and sold, weighted average price per share								$ 10.76
Net proceeds after offering costs and commissions from sale of shares								$ 9,800
ATM Program | Common Stock | Subsequent Event
Class of Stock
Shares issued through public offering		215,515
Numbers shares issued and sold, weighted average price per share		$ 11.35
Net proceeds after offering costs and commissions from sale of shares		$ 2,400