| Business and Organization - Additional Information (Detail) (Gladstone Land Advisers, Inc. [Member]) | 9 Months Ended | 
|---|---|
| Sep. 30, 2013 | |
| Gladstone Land Advisers, Inc. [Member] | |
| Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] | |
| Company's ownership percent of voting securities of Land Advisers | 100.00% | 
| X | ||||||||||
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- Details 
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| X | ||||||||||
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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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