Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Real Estate Properties [Line Items]
Ownership in operating partnership	33.12%	27.77%
Real Estate
Real Estate Properties [Line Items]
Percentage of total assets that must consist of real estate assets per the Internal Revenue Code election to be treated as REIT	75.00%
Percentage of total gross income that must be derived from real estate per the Internal Revenue Code election to be treated as REIT	75.00%