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Subsequent Events - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended											1 Months Ended
	Dec. 31, 2013 Property	Dec. 31, 2012	Aug. 13, 2013 Underwritten public offering	Jan. 29, 2014 Subsequent event Underwritten public offering	Feb. 28, 2014 Subsequent event Oklahoma Portfolio Property	Feb. 28, 2014 Subsequent event Oklahoma Portfolio First Lien	Feb. 28, 2014 Subsequent event Oklahoma Portfolio Oklahoma City's Northwest Sub Market Property	Feb. 28, 2014 Subsequent event Oklahoma Portfolio Edmond, Oklahoma Property	Feb. 28, 2014 Subsequent event Oklahoma Portfolio One bedroom, one bathroom units Property	Feb. 28, 2014 Subsequent event Oklahoma Portfolio Two bedroom, one bathroom units Property	Feb. 28, 2014 Subsequent event Oklahoma Portfolio Two bedroom, two bathroom units Property	Feb. 28, 2014 Subsequent event Oklahoma Portfolio Three bedroom, two bathroom units Property	Feb. 28, 2014 Subsequent event Oklahoma Portfolio One bungalow house Property	Jan. 31, 2014 Subsequent event The Reserve at Eagle Ridge Property	Feb. 07, 2014 Subsequent event The Reserve at Eagle Ridge
Subsequent Event [Line Items]
Number of multifamily fee simple interest property owned					5
Number of multifamily property owned	10				5		4	1
Number of units located with multifamily properties	2,790				1,658				1,048	40	537	32	1	370
Payment for improvement of portfolio	$ 1,014,000	$ 1,148,000			$ 12,000,000
Purchased price of a property					65,000,000									29,000,000
Current Interest Rate						5.60%									4.67%
Maturity date of mortgage loan						April 2016
Mortgage loan due amount on maturity						43,600,000
Outstanding Principal															18,850,000
Interest payment period															Monthly
Maturity Date															Mar. 01, 2014
Common stock sold			4,000,000	8,050,000
Common stock offering price			$ 8.50	$ 8.30
Gross Proceeds from offering	$ 31,153,000	$ 3,193,000	$ 34,000,000	$ 66,800,000

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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