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Business and Organization - Additional Information (Detail)	Jun. 30, 2021	Dec. 31, 2020
OP Unit Holder
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Company's ownership percent (as percent)	99.30%	100.00%
Gladstone Land Advisers Inc
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Company's ownership percent (as percent)	100.00%

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Organization consolidation and presentation of financial statements disclosure.

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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