Annual report pursuant to Section 13 and 15(d)

Business and Organization - Additional Information (Detail)

v3.8.0.1
Business and Organization - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Gladstone Land Limited Partnership    
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]    
Company's ownership percent of voting securities of Land Advisers 93.20% 87.40%
Gladstone Land Advisers, Inc.    
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]    
Company's ownership percent of voting securities of Land Advisers 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