Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate and Accumulated Depreciation (Narrative) (Detail)

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Schedule III - Real Estate and Accumulated Depreciation (Narrative) (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Aggregate cost $ 337,376,594 $ 228,417,837 $ 148,371,478 $ 78,478,053
Land, Buildings, Improvements & Horticulture        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Aggregate cost $ 319,800,000      
Buildings and Improvements        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Estimated useful life 39 years      
Horticulture        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Estimated useful life 25 years      
Equipment And Fixtures | Minimum        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Estimated useful life 5 years      
Equipment And Fixtures | Maximum        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Estimated useful life 7 years