Stockholder Equity and Non-Controlling Interest - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands							1 Months Ended	12 Months Ended
	Oct. 31, 2016	Oct. 21, 2016	Oct. 05, 2016	Aug. 01, 2016	Feb. 01, 2016	Sep. 17, 2015	Oct. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Class Of Stock [Line Items]
Common stock, par value								$ 0.01	$ 0.01
Net proceeds of public offering			$ 62,156
Common stock repurchased and retired shares			7,269,719
Share repurchase price per share			$ 8.55
Amount reserved to consummate management internalization			$ 43,000
Amount held for general corporate purposes			20,898
Share based compensation expense associated with vested equity awards								$ 142
Limited partnership interest received in exchange for issuance of common stock	6,059			35,808	204,115				52,937
Exchange of units to common stock	6,059			35,808	204,113
OP Units outstanding								2,908,949
OP Units redemption value								$ 25,948
Share price								$ 8.92	$ 7.51	$ 9.31
Common Shares
Class Of Stock [Line Items]
Common stock issued								28,750,000	15,105,669	22,098,536
Exchange of units to common stock								245,980	52,933
Trade Street Residential, Inc.
Class Of Stock [Line Items]
Merger completion date						Sep. 17, 2015
Common stock shares converted into right to receive cash						$ 3.80
Common stock shares converted into right to receive shares of IRT						0.4108
Shares issued to acquire entity						15,110,994
Trade Street Residential, Inc. | Limited Partner
Class Of Stock [Line Items]
Operating partnership units exchanged in merger						1,925,419
OP Units value, exchanged in merger						$ 13,998
Senior Term Loan Facility
Class Of Stock [Line Items]
Repayment of term loan facility			40,000
Secured Credit Facility
Class Of Stock [Line Items]
Repayments Of Lines Of Credit			$ 47,335				$ 107,335
Credit facility outstanding amount								$ 325,000
Underwritten public offering
Class Of Stock [Line Items]
Common stock issued		3,750,000	25,000,000
Common stock, par value			$ 0.01
Public offering price per share		$ 9.00	$ 9.00
Net proceeds of public offering		$ 32,062	$ 213,389
Underwriters option exercise period			30 days