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v3.20.4

Subsequent Events - Acquisition Activity (Details) | 12 Months Ended
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Dec. 31, 2020 a farm
Subsequent Event [Line Items] |
Total Acres | a | 101,079
No. of Farms | farm | 137

X
- Definition Number of real estate farms. + References No definition available. + Details
Name: | land_NumberOfRealEstateFarms
Namespace Prefix: | land_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration