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Real Estate and Intangible Assets - 2018 Acquisitions (Detail) | 12 Months Ended |
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Dec. 31, 2019 USD ($) a farm | Dec. 31, 2018 USD ($) a farm option | Jul. 12, 2018 USD ($)
Real Estate Properties [Line Items] |  |  |
Total Acres | a | 86,535 | 73,205 |
No. of Farms | farm | 111 | 85 |
New Long-term Debt | $ 485,049,000 |  |
Van Buren, MI |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a | 119 |  |
Collier & Hendry, FL |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a | 5,630 |  |
Madera, CA |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a | 928 |  |
2018 New Real Estate Activity |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 12,114 |
No. of Farms | farm | 13 | 13 |
Total Purchase Price |  | $ 91,426,000 |
Acquisitions Costs |  | 511,000 |
Annualized Straight-line Rent |  | 4,581,000 |
New Long-term Debt |  | $ 49,893,000 |
2018 New Real Estate Activity | Taft Highway | Kern, CA |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 161 |
No. of Farms | farm |  | 1 |
Total Purchase Price |  | $ 2,945,000 |
Acquisitions Costs |  | 32,000 |
Annualized Straight-line Rent |  | 0 |
New Long-term Debt |  | $ 1,473,000 |
2018 New Real Estate Activity | Cemetery Road | Van Buren, MI |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 176 |
No. of Farms | farm |  | 1 |
Lease Term |  | 9 years 7 months 6 days |
Total Purchase Price |  | $ 2,100,000 |
Acquisitions Costs |  | 39,000 |
Annualized Straight-line Rent |  | 150,000 |
New Long-term Debt |  | $ 1,260,000 |
2018 New Real Estate Activity | Owl Hammock | Collier & Hendry, FL |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 5,630 |
No. of Farms | farm |  | 5 |
Lease Term |  | 6 years 11 months 19 days |
Renewal Options | option |  | 2 |
Renewal Term |  | 5 years |
Total Purchase Price |  | $ 37,350,000 |
Acquisitions Costs |  | 197,000 |
Annualized Straight-line Rent |  | 2,148,000 |
New Long-term Debt |  | $ 22,410,000 |
2018 New Real Estate Activity | Plantation Road | Jacksonville, FL |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 574 |
No. of Farms | farm |  | 1 |
Lease Term |  | 2 years 3 months 25 days |
Total Purchase Price |  | $ 2,600,000 |
Acquisitions Costs |  | 35,000 |
Annualized Straight-line Rent |  | 142,000 |
New Long-term Debt |  | $ 1,560,000 |
2018 New Real Estate Activity | Flint Avenue | Kings County, CA |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 194 |
No. of Farms | farm |  | 2 |
Lease Term |  | 15 years 3 months 18 days |
Renewal Options | option |  | 1 |
Renewal Term |  | 5 years |
Total Purchase Price |  | $ 6,850,000 |
Acquisitions Costs |  | 61,000 |
Annualized Straight-line Rent |  | 523,000 |
New Long-term Debt |  | $ 4,110,000 |
2018 New Real Estate Activity | Sunnyside Avenue | Madera, CA |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 951 |
No. of Farms | farm |  | 1 |
Lease Term |  | 8 years |
Renewal Options | option |  | 2 |
Renewal Term |  | 5 years |
Total Purchase Price |  | $ 23,000,000 |
Acquisitions Costs |  | 65,000 |
Annualized Straight-line Rent |  | 1,237,000 |
New Long-term Debt |  | $ 13,800,000 |
2018 New Real Estate Activity | Bunker Hill | Hartley, TX |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 3,667 |
No. of Farms | farm |  | 1 |
Lease Term |  | 1 year 1 month 6 days |
Total Purchase Price |  | $ 8,400,000 |
Acquisitions Costs |  | 37,000 |
Annualized Straight-line Rent |  | 356,000 |
New Long-term Debt |  | 5,280,000 |
Credit provided by seller |  | $ 100,000 |
2018 New Real Estate Activity | Olsen Road | Merced, CA |  |  |
Real Estate Properties [Line Items] |  |  |
Total Acres | a |  | 761 |
No. of Farms | farm |  | 1 |
Lease Term |  | 10 months 24 days |
Total Purchase Price |  | $ 8,181,000 |
Acquisitions Costs |  | 45,000 |
Annualized Straight-line Rent |  | 25,000 |
New Long-term Debt |  | 0 |
Initial rent payment received |  | $ 471,000 |
2018 New Real Estate Activity | Olsen Road | Merced, CA | Lease One |  |  |
Real Estate Properties [Line Items] |  |  |
Renewal Options | option |  | 3 |
Renewal Term |  | 5 years |
2018 New Real Estate Activity | Olsen Road | Merced, CA | Lease Two |  |  |
Real Estate Properties [Line Items] |  |  |
Renewal Options | option |  | 1 |
Renewal Term |  | 3 years |
Land and Land Improvements | 2018 New Real Estate Activity | Owl Hammock | Collier & Hendry, FL |  |  |
Real Estate Properties [Line Items] |  |  |
Payments to develop real estate assets |  |  | $ 2,000,000

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