| 
           Business and Organization - Additional Information (Detail) (Gladstone Land Advisers, Inc. [Member]) 
         | 
        3 Months Ended | 
|---|---|
| 
           Mar. 31, 2014 
         | 
      |
| 
           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 | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- 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 
  |