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Business - Additional Information (Detail) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Gladstone Land Limited Partnership |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company's ownership percent (as percent) | 91.70% | 87.40%
Maryland |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company re-incorporated date | Mar. 24, 2011 |
Delaware |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company re-incorporated date | May 25, 2004 |
California |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |
Company originally incorporated date | Jun. 14, 1997 |

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