Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summary of Geographic Locations of Properties (Detail)

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Real Estate and Intangible Assets - Summary of Geographic Locations of Properties (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
a
Sep. 30, 2016
USD ($)
a
Sep. 30, 2017
USD ($)
a
farm
Sep. 30, 2016
USD ($)
a
farm
Aug. 31, 2017
a
Real Estate Properties [Line Items]          
No. of Farms | farm     72 56  
Total Acres | a 61,794 33,800 61,794 33,800  
% of Total Acres     100.00% 100.00%  
Rental Revenue | $ $ 6,561 $ 4,467 $ 18,302 $ 12,388  
% of Total Rental Revenue     100.00% 100.00%  
California          
Real Estate Properties [Line Items]          
No. of Farms | farm     27 21  
Total Acres | a 7,921 6,516 7,921 6,516 361
% of Total Acres     12.80% 19.30%  
Rental Revenue | $     $ 8,749 $ 6,986  
% of Total Rental Revenue     47.80% 56.40%  
Florida          
Real Estate Properties [Line Items]          
No. of Farms | farm     17 15  
Total Acres | a 11,225 5,567 11,225 5,567 1,910
% of Total Acres     18.20% 16.50%  
Rental Revenue | $     $ 4,839 $ 2,408  
% of Total Rental Revenue     26.50% 19.40%  
Colorado          
Real Estate Properties [Line Items]          
No. of Farms | farm     9 8  
Total Acres | a 30,170 13,575 30,170 13,575  
% of Total Acres     48.80% 40.10%  
Rental Revenue | $     $ 2,018 $ 951  
% of Total Rental Revenue     11.00% 7.70%  
Arizona          
Real Estate Properties [Line Items]          
No. of Farms | farm     6 2  
Total Acres | a 6,280 3,000 6,280 3,000  
% of Total Acres     10.20% 8.90%  
Rental Revenue | $     $ 1,114 $ 544  
% of Total Rental Revenue     6.10% 4.40%  
Oregon          
Real Estate Properties [Line Items]          
No. of Farms | farm     4 4  
Total Acres | a 2,313 2,313 2,313 2,313  
% of Total Acres     3.70% 6.80%  
Rental Revenue | $     $ 887 $ 877  
% of Total Rental Revenue     4.80% 7.10%  
Nebraska          
Real Estate Properties [Line Items]          
No. of Farms | farm     2 2  
Total Acres | a 2,559 2,559 2,559 2,559  
% of Total Acres     4.20% 7.60%  
Rental Revenue | $     $ 435 $ 435  
% of Total Rental Revenue     2.40% 3.50%  
Michigan          
Real Estate Properties [Line Items]          
No. of Farms | farm     4 4  
Total Acres | a 270 270 270 270  
% of Total Acres     0.40% 0.80%  
Rental Revenue | $     $ 187 $ 187  
% of Total Rental Revenue     1.00% 1.50%  
North Carolina          
Real Estate Properties [Line Items]          
No. of Farms | farm     2 0  
Total Acres | a 310 0 310 0  
% of Total Acres     0.50% 0.00%  
Rental Revenue | $     $ 42 $ 0  
% of Total Rental Revenue     0.20% 0.00%  
Washington          
Real Estate Properties [Line Items]          
No. of Farms | farm     1 0  
Total Acres | a 746 0 746 0  
% of Total Acres     1.20% 0.00%  
Rental Revenue | $     $ 31 $ 0  
% of Total Rental Revenue     0.20% 0.00%