XML 49 R31.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Business and Organization - Additional Information (Detail) | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
OP Unit Holder |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |
Company's ownership percent | 100.00% | 100.00% | 99.40%

X
- Definition Organization consolidation and presentation of financial statements disclosure. + References No definition available. + Details
Name: | land_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems
Namespace Prefix: | land_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_OwnershipAxis=land_OPUnitHolderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |