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Real Estate and Intangible Assets - Summary Information of Farms (Detail) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 a farm | Dec. 31, 2018 USD ($) a farm | Dec. 31, 2017 USD ($) a farm | Jun. 07, 2018 a
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 85 | 73 |
Total Acres |  | 73,205 | 63,014 |
Farm Acres |  | 57,744 |  |
Net Cost Basis | $ |  | $ 541,656 |  |
Encumbrances | $ |  | $ 338,226 |  |
California |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 33 | 28 |
Total Acres |  | 10,147 | 8,080 |
Farm Acres |  | 9,336 |  |
Net Cost Basis | $ |  | $ 249,984 |  |
Encumbrances | $ |  | $ 168,158 |  |
Florida |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 22 | 16 |
Total Acres |  | 17,184 | 11,006 | 26
Farm Acres |  | 12,981 |  |
Net Cost Basis | $ |  | $ 154,749 |  |
Encumbrances | $ |  | $ 97,262 |  |
Colorado |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 10 | 10 |
Total Acres |  | 31,448 | 31,450 |
Farm Acres |  | 24,513 |  |
Net Cost Basis | $ |  | $ 42,098 |  |
Encumbrances | $ |  | $ 25,468 |  |
Arizona |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 6 | 6 |
Total Acres |  | 6,280 | 6,280 |
Farm Acres |  | 5,228 |  |
Net Cost Basis | $ |  | $ 53,849 |  |
Encumbrances | $ |  | $ 22,359 |  |
Nebraska |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 2 | 2 |
Total Acres |  | 2,559 | 2,559 |
Farm Acres |  | 2,101 |  |
Net Cost Basis | $ |  | $ 10,464 |  |
Encumbrances | $ |  | $ 7,050 |  |
Washington |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 1 | 1 |
Total Acres |  | 746 | 746 |
Farm Acres |  | 417 |  |
Net Cost Basis | $ |  | $ 8,845 |  |
Encumbrances | $ |  | $ 5,236 |  |
North Carolina |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 2 | 2 |
Total Acres |  | 310 | 310 |
Farm Acres |  | 295 |  |
Net Cost Basis | $ |  | $ 2,323 |  |
Encumbrances | $ |  | $ 1,270 |  |
Oregon |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 1 | 0 |
Total Acres |  | 3,667 | 0 |
Farm Acres |  | 2,219 |  |
Net Cost Basis | $ |  | $ 8,418 |  |
Encumbrances | $ |  | $ 5,280 |  |
Oregon |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 3 | 4 |
Total Acres |  | 418 | 2,313 |
Farm Acres |  | 363 |  |
Net Cost Basis | $ |  | $ 5,946 |  |
Encumbrances | $ |  | $ 3,375 |  |
Michigan |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  | 5 | 4 |
Total Acres |  | 446 | 270 |
Farm Acres |  | 291 |  |
Net Cost Basis | $ |  | $ 4,980 |  |
Encumbrances | $ |  | 2,768 |  |
Long-term mortgage notes and bonds payable |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Deferred financing costs related to mortgage notes and bonds payable | $ |  | $ 2,338 | $ 1,986 |
State of Arizona | Arizona |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm | 2 |  |  |
Total Acres | 1,368 |  |  |
Farm Acres |  | 1,221 |  |
Net Cost Basis | $ |  | $ 2,700 |  |
2017 New Real Estate Activity |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  |  | 16 |
Total Acres |  |  | 12,641 |
Encumbrances | $ |  |  | $ 75,763 |
2017 New Real Estate Activity | State of Arizona | Yuma, AZ |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
No. of Farms | farm |  |  | 2 |
Total Acres |  |  | 1,368 |

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