Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summary Information of Farms (Detail)

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Real Estate and Intangible Assets - Summary Information of Farms (Detail)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
USD ($)
a
option
farm
Sep. 30, 2016
USD ($)
a
option
farm
Aug. 31, 2017
a
Real Estate Properties [Line Items]      
No. of Farms | farm 72 56  
Total Acres | a 61,794 33,800  
Farm Acres (in acres) | a 49,667    
Net Cost Basis $ 447,332    
Encumbrances/Net Long-term Debt Issued $ 297,236    
2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
No. of Farms | farm 14    
Total Acres | a 11,202    
Total Purchase Price $ 121,847    
Acquisition Costs 436    
Annualized straight-line cash rent 6,692    
Encumbrances/Net Long-term Debt Issued $ 71,668    
2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
No. of Farms | farm   13  
Total Acres | a   16,988  
Total Purchase Price   $ 81,558  
Acquisition Costs   413  
Annualized straight-line cash rent   4,332  
Encumbrances/Net Long-term Debt Issued   $ 28,953  
California      
Real Estate Properties [Line Items]      
No. of Farms | farm 27 21  
Total Acres | a 7,921 6,516 361
Farm Acres (in acres) | a 7,156    
Net Cost Basis $ 202,181    
Encumbrances/Net Long-term Debt Issued $ 145,819    
Fresno, CA | Phelps Avenue | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date Jul. 17, 2017    
No. of Farms | farm 4    
Total Acres | a 847    
Renewal Options, Number of Renewal Options | option 1    
Renewal Options, Lease Term 5 years    
Total Purchase Price $ 13,603    
Acquisition Costs 43    
Annualized straight-line cash rent 681    
Encumbrances/Net Long-term Debt Issued $ 8,162    
Fresno, CA | Phelps Avenue | 2017 New Real Estate Activity | Weighted average      
Real Estate Properties [Line Items]      
Lease Term 10 years 3 months 15 days    
Fresno, CA | Calaveras Avenue | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date   Apr. 05, 2016  
No. of Farms | farm   1  
Total Acres | a   453  
Lease Term   10 years  
Renewal Options, Number of Renewal Options | option   1  
Renewal Options, Lease Term   5 years  
Total Purchase Price   $ 15,470  
Acquisition Costs   39  
Annualized straight-line cash rent   774  
Encumbrances/Net Long-term Debt Issued   $ 9,282  
Santa Barbara, CA | Cat Canyon Road(7) | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date Aug. 30, 2017    
No. of Farms | farm 1    
Total Acres | a 361    
Renewal Options, Number of Renewal Options | option 2    
Renewal Options, Lease Term 5 years    
Total Purchase Price $ 5,375    
Acquisition Costs 67    
Annualized straight-line cash rent 322    
Encumbrances/Net Long-term Debt Issued $ 3,225    
Santa Barbara, CA | Cat Canyon Road(7) | 2017 New Real Estate Activity | Weighted average      
Real Estate Properties [Line Items]      
Lease Term 9 years 9 months 4 days    
Stanislaus, CA | Diego Ranch | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date   Sep. 14, 2016  
No. of Farms | farm   1  
Total Acres | a   1,357  
Lease Term   3 years  
Total Purchase Price   $ 13,997  
Acquisition Costs   64  
Annualized straight-line cash rent   621  
Encumbrances/Net Long-term Debt Issued   $ 0  
Stanislaus, CA | Diego Ranch Lease Arrangement 1 | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Renewal Options, Number of Renewal Options | option   3  
Renewal Options, Lease Term   5 years  
Stanislaus, CA | Diego Ranch Lease Arrangement 2 | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Renewal Options, Number of Renewal Options | option   1  
Renewal Options, Lease Term   3 years  
Merced, CA | Nevada Ranch | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date   Sep. 14, 2016  
No. of Farms | farm   1  
Total Acres | a   1,130  
Lease Term   3 years  
Total Purchase Price   $ 13,232  
Acquisition Costs   42  
Annualized straight-line cash rent   574  
Encumbrances/Net Long-term Debt Issued   $ 0  
Merced, CA | Nevada Ranch, Lease Arrangement 1 | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Renewal Options, Number of Renewal Options | option   3  
Renewal Options, Lease Term   5 years  
Merced, CA | Nevada Ranch, Lease Arrangement 2 | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Renewal Options, Number of Renewal Options | option   1  
Renewal Options, Lease Term   3 years  
Florida      
Real Estate Properties [Line Items]      
No. of Farms | farm 17 15  
Total Acres | a 11,225 5,567 1,910
Farm Acres (in acres) | a 9,027    
Net Cost Basis $ 117,549    
Encumbrances/Net Long-term Debt Issued $ 76,072    
Martin, FL | Citrus Boulevard | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date Jan. 12, 2017    
No. of Farms | farm 1    
Total Acres | a 3,748    
Lease Term 7 years    
Renewal Options, Number of Renewal Options | option 3    
Renewal Options, Lease Term 5 years    
Total Purchase Price $ 54,000    
Acquisition Costs 80    
Annualized straight-line cash rent 2,926    
Encumbrances/Net Long-term Debt Issued $ 32,400    
Okeechobee, FL | Parrot Avenue(6) | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date Aug. 09, 2017    
No. of Farms | farm 1    
Total Acres | a 1,910    
Renewal Options, Number of Renewal Options | option 0    
Total Purchase Price $ 9,700    
Acquisition Costs 64    
Annualized straight-line cash rent 488    
Encumbrances/Net Long-term Debt Issued $ 5,820    
Okeechobee, FL | Parrot Avenue(6) | 2017 New Real Estate Activity | Weighted average      
Real Estate Properties [Line Items]      
Lease Term 6 months 17 days    
St. Lucie, FL | Orange Avenue | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date   Jul. 01, 2016  
No. of Farms | farm   1  
Total Acres | a   401  
Lease Term   7 years  
Renewal Options, Number of Renewal Options | option   2  
Renewal Options, Lease Term   7 years  
Total Purchase Price   $ 5,100  
Acquisition Costs   38  
Annualized straight-line cash rent   291  
Encumbrances/Net Long-term Debt Issued   $ 3,120  
Hillsborough, FL | Lithia Road | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date   Aug. 11, 2016  
No. of Farms | farm   1  
Total Acres | a   72  
Lease Term   5 years  
Renewal Options, Number of Renewal Options | option   0  
Total Purchase Price   $ 1,700  
Acquisition Costs   38  
Annualized straight-line cash rent   97  
Encumbrances/Net Long-term Debt Issued   $ 1,020  
Colorado      
Real Estate Properties [Line Items]      
No. of Farms | farm 9 8  
Total Acres | a 30,170 13,575  
Farm Acres (in acres) | a 23,257    
Net Cost Basis $ 41,812    
Encumbrances/Net Long-term Debt Issued $ 24,686    
Saguache, CO | Gunbarrel Road | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date   Mar. 03, 2016  
No. of Farms | farm   3  
Total Acres | a   6,191  
Lease Term   5 years  
Renewal Options, Number of Renewal Options | option   1  
Renewal Options, Lease Term   5 years  
Total Purchase Price   $ 25,736  
Acquisition Costs   119  
Annualized straight-line cash rent   1,591  
Encumbrances/Net Long-term Debt Issued   $ 15,531  
Baca, CO | Baca County | 2016 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date   Sep. 01, 2016  
No. of Farms | farm   5  
Total Acres | a   7,384  
Lease Term   4 years  
Renewal Options, Number of Renewal Options | option   1  
Renewal Options, Lease Term   5 years  
Total Purchase Price   $ 6,323  
Acquisition Costs   73  
Annualized straight-line cash rent   384  
Encumbrances/Net Long-term Debt Issued   $ 0  
Arizona      
Real Estate Properties [Line Items]      
No. of Farms | farm 6 2  
Total Acres | a 6,280 3,000  
Farm Acres (in acres) | a 5,228    
Net Cost Basis $ 40,570    
Encumbrances/Net Long-term Debt Issued $ 23,166    
Yuma, AZ | Spot Road | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date Jun. 01, 2017    
No. of Farms | farm 4    
Total Acres | a 3,280    
Total Purchase Price $ 27,500    
Acquisition Costs 88    
Annualized straight-line cash rent 1,673    
Encumbrances/Net Long-term Debt Issued $ 15,300    
Yuma, AZ | Spot Road | 2017 New Real Estate Activity | Weighted average      
Real Estate Properties [Line Items]      
Lease Term 8 years 6 months 19 days    
Yuma, AZ | Spot Road Property 1 | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Renewal Options, Number of Renewal Options | option 1    
Renewal Options, Lease Term 10 years    
Yuma, AZ | Spot Road Property 2 | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Renewal Options, Number of Renewal Options | option 1    
Renewal Options, Lease Term 2 years    
Oregon      
Real Estate Properties [Line Items]      
No. of Farms | farm 4 4  
Total Acres | a 2,313 2,313  
Farm Acres (in acres) | a 2,003    
Net Cost Basis $ 19,755    
Encumbrances/Net Long-term Debt Issued $ 12,528    
Nebraska      
Real Estate Properties [Line Items]      
No. of Farms | farm 2 2  
Total Acres | a 2,559 2,559  
Farm Acres (in acres) | a 2,101    
Net Cost Basis $ 10,667    
Encumbrances/Net Long-term Debt Issued $ 6,602    
Washington      
Real Estate Properties [Line Items]      
No. of Farms | farm 1 0  
Total Acres | a 746 0  
Farm Acres (in acres) | a 417    
Net Cost Basis $ 9,525    
Encumbrances/Net Long-term Debt Issued $ 5,460    
Walla Walla, WA | Oasis Road | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date Sep. 08, 2017    
No. of Farms | farm 1    
Total Acres | a 746    
Renewal Options, Number of Renewal Options | option 0    
Total Purchase Price $ 9,500    
Acquisition Costs 45    
Annualized straight-line cash rent 480    
Encumbrances/Net Long-term Debt Issued $ 5,460    
Walla Walla, WA | Oasis Road | 2017 New Real Estate Activity | Weighted average      
Real Estate Properties [Line Items]      
Lease Term 6 years 3 months 7 days    
Michigan      
Real Estate Properties [Line Items]      
No. of Farms | farm 4 4  
Total Acres | a 270 270  
Farm Acres (in acres) | a 183    
Net Cost Basis $ 2,965    
Encumbrances/Net Long-term Debt Issued $ 1,602    
North Carolina      
Real Estate Properties [Line Items]      
No. of Farms | farm 2 0  
Total Acres | a 310 0  
Farm Acres (in acres) | a 295    
Net Cost Basis $ 2,308    
Encumbrances/Net Long-term Debt Issued $ 1,301    
Bladen, NC | Poplar Street | 2017 New Real Estate Activity      
Real Estate Properties [Line Items]      
Acquisition Date Jun. 02, 2017    
No. of Farms | farm 2    
Total Acres | a 310    
Renewal Options, Number of Renewal Options | option 1    
Renewal Options, Lease Term 5 years    
Total Purchase Price $ 2,169    
Acquisition Costs 49    
Annualized straight-line cash rent 122    
Encumbrances/Net Long-term Debt Issued $ 1,301    
Bladen, NC | Poplar Street | 2017 New Real Estate Activity | Weighted average      
Real Estate Properties [Line Items]      
Lease Term 9 years 6 months 29 days