Summary of Related Party Costs (Parenthetical) (Detail) - USD ($)		3 Months Ended	12 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Related party costs, Incurred		$ 13,180,312	$ 25,164,607
Property management fees
Related Party Transaction [Line Items]
Related party costs, Incurred	[1]	368,812	1,259,135
Sub-property manager | Property management fees
Related Party Transaction [Line Items]
Related party costs, Incurred		$ 300,000	$ 300,000

[1] During the year ended December 31, 2015, property management fees included approximately $0.3 million of fees paid to the sub-property manager of our properties. During the three months ended March 31, 2016, property management fees included approximately $0.3 million of fees paid to the sub-property manager of our properties.