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Related Party Transactions and Arrangements - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended
	May. 07, 2013 Property	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transaction [Line Items]
Quarterly management fee as percentage of average real estate assets	0.1875%
Quarterly management fee payment rate as percentage of average real estate assets	0.1875%
Base management fees earned		$ 1,046	$ 347	$ 2,047	$ 493
Number of properties excluded from computation of base management fee | Property	8
Incentive fees incurred to advisor		214	154	$ 425	154
Percentage of gross revenues from the property				4.00%
Property management and leasing fees		764	$ 411	$ 1,519	$ 732
Incentive Fees
Related Party Transaction [Line Items]
Incentive fees payable to advisor		1,260		1,260		$ 644
Other Liabilities
Related Party Transaction [Line Items]
Property management and leasing fees payable		$ 262		$ 262		$ 205
if pre-incentive fee Core FFO does not exceed hurdle rate
Related Party Transaction [Line Items]
Advisor incentive fee	0.00%
if pre-incentive fee Core FFO does not exceed hurdle rate | Maximum
Related Party Transaction [Line Items]
Cumulative gross amount of equity capital, hurdle rate	1.75%
Cumulative gross amount of equity capital, annual hurdle rate	7.00%
if pre-incentive fee Core FFO exceeds hurdle rate
Related Party Transaction [Line Items]
Advisor incentive fee	20.00%
if pre-incentive fee Core FFO exceeds hurdle rate | Minimum
Related Party Transaction [Line Items]
Cumulative gross amount of equity capital, hurdle rate	1.75%
Cumulative gross amount of equity capital, annual hurdle rate	7.00%

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Advisory Fee Percentage

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Payment of property management and leasing fees to property manager.

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