XML 62 R48.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Real Estate and Intangible Assets - Concentrations (Narrative) (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) tenant farm | Dec. 31, 2017 USD ($) farm
Real Estate Properties [Line Items] |  |
Number of tenants | tenant | 63 |
Number of farms | farm | 85 | 73
Rental Revenue | $ | $ 29,322 | $ 25,111
% of Total Rental Revenue | 100.00% | 100.00%
California |  |
Real Estate Properties [Line Items] |  |
Number of farms | farm | 33 | 28
Rental Revenue | $ | $ 13,637 | $ 12,006
% of Total Rental Revenue | 46.50% | 47.80%
Florida |  |
Real Estate Properties [Line Items] |  |
Number of farms | farm | 22 | 16
Rental Revenue | $ | $ 8,132 | $ 6,585
% of Total Rental Revenue | 27.70% | 26.20%
Tenant A |  |
Real Estate Properties [Line Items] |  |
Number of farms | farm | 5 |
Rental Revenue | $ | $ 4,400 |
% of Total Rental Revenue | 15.10% |

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 Number of Tenants, Lease Properties + References No definition available. + Details
Name: | land_NumberofTenantsLeaseProperties
Namespace Prefix: | land_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of rental revenue. + References No definition available. + Details
Name: | land_PercentageOfRentalRevenue
Namespace Prefix: | land_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
Name: | us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_FL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=land_TenantAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |