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Business and Organization - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Gladstone Land Limited Partnership |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company's ownership percent (as percent) | 96.90% | 93.20%
Land Advisers |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company's ownership percent (as percent) | 100.00% |
Maryland |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company re-incorporated date | Mar. 24, 2011 |
California |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company originally incorporated date | Jun. 14, 1997 |

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