Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summarized Information of Acquisition of Properties (Detail)

v2.4.1.9
Real Estate and Intangible Assets - Summarized Information of Acquisition of Properties (Detail) (USD $)
 3 Months Ended
Mar. 31, 2015
Farm
Real Estate Properties [Line Items]  
Number of Farms 2land_NumberOfFarmsAcquired
Espinosa Road [Member] | Salinas, CA [Member]  
Real Estate Properties [Line Items]  
Acquisition Date Jan. 05, 2015
Parrish Road [Member] | Duette, FL [Member]  
Real Estate Properties [Line Items]  
Acquisition Date Mar. 10, 2015
2015 New Real Estate Activity [Member]  
Real Estate Properties [Line Items]  
Total Acreage 750land_AreaOfRealEstatePropertyAcquired
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
Number of Farms 2land_NumberOfFarmsAcquired
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
Total Purchase Price 20,818,780us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
Acquisition Costs 185,795us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
Annualized Straight-line Rent 1,030,174land_AnnualizedStraightLineRentEscalations
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
2015 New Real Estate Activity [Member] | Espinosa Road [Member]  
Real Estate Properties [Line Items]  
Acquisition Date Jan. 05, 2015
2015 New Real Estate Activity [Member] | Parrish Road [Member]  
Real Estate Properties [Line Items]  
Acquisition Date Mar. 10, 2015
2015 New Real Estate Activity [Member] | Strawberries [Member] | Espinosa Road [Member] | Salinas, CA [Member]  
Real Estate Properties [Line Items]  
Acquisition Date Jan. 05, 2015
Total Acreage 331land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_EspinosaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Number of Farms 1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_EspinosaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Lease Term 1 year 9 months 18 days
Total Purchase Price 16,905,500us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_EspinosaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Acquisition Costs 85,805us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_EspinosaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Annualized Straight-line Rent 778,342land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_EspinosaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
2015 New Real Estate Activity [Member] | Strawberries [Member] | Parrish Road [Member] | Duette, FL [Member]  
Real Estate Properties [Line Items]  
Acquisition Date Mar. 10, 2015
Total Acreage 419land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember
Number of Farms 1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember
Lease Term 10 years 3 months 18 days
Renewal Options 5 years
Total Purchase Price 3,913,280us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember
Acquisition Costs 99,990us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember
Annualized Straight-line Rent 251,832land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember