Annual report pursuant to Section 13 and 15(d)

Real Estate and Lease Intangibles - Summarized Information of Acquisition of Properties (Detail)

v2.4.1.9
Real Estate and Lease Intangibles - Summarized Information of Acquisition of Properties (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Farm
Dec. 31, 2013
Farm
Real Estate Properties [Line Items]    
Number of Farms 11land_NumberOfFarmsAcquired 9land_NumberOfFarmsAcquired
Debt Issued / Encumbrances $ 86,417,361us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances  
McIntosh Road [Member] | Dover, FL [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jun. 20, 2014  
Debt Issued / Encumbrances 1,599,600us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_McintoshRoadMember
/ us-gaap_StatementGeographicalAxis
= land_DoverFlMember 		 
Collins Road [Member] | Clatskanie, OR [Member]    
Real Estate Properties [Line Items]    
Acquisition Date May 30, 2014  
Spring Valley [Member] | Watsonville, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jun. 13, 2014  
Debt Issued / Encumbrances 2,862,237us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember
/ us-gaap_StatementGeographicalAxis
= land_WatsonvilleCaMember 		 
Naumann Road [Member] | Oxnard, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jul. 23, 2014  
Debt Issued / Encumbrances 3,342,510us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_NaumannRoadMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Sycamore Road [Member] | Arvin, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jul. 25, 2014  
Debt Issued / Encumbrances 2,813,724us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_StatementGeographicalAxis
= land_ArvinCaMember 		 
Wauchula Road [Member] | Duette, FL [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Sep. 29, 2014  
Debt Issued / Encumbrances 8,155,762us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember 		 
Santa Clara Avenue [Member] | Oxnard, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Oct. 29, 2014  
Debt Issued / Encumbrances 12,128,121us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_SantaClaraAvenueMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Dufau Road [Member] | Oxnard, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Nov. 04, 2014  
Debt Issued / Encumbrances 3,675,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_DufauRoadMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Natividad Road [Member] | Salinas, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Oct. 21, 2013  
Debt Issued / Encumbrances 3,395,874us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_NatividadRoadMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember 		 
38th Avenue [Member] | Covert, MI [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Apr. 05, 2013  
Debt Issued / Encumbrances 650,552us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_ThirtyEightAvenueMember
/ us-gaap_StatementGeographicalAxis
= land_CovertMiMember 		 
Sequoia Street [Member] | Brooks, OR [Member]    
Real Estate Properties [Line Items]    
Acquisition Date May 31, 2013  
Debt Issued / Encumbrances 1,503,888us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_SequoiaStreetMember
/ us-gaap_StatementGeographicalAxis
= land_BrooksOrMember 		 
20th Avenue [Member] | South Haven, MI [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Nov. 05, 2013  
Debt Issued / Encumbrances 970,250us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_TwentiethAvenueMember
/ us-gaap_StatementGeographicalAxis
= land_SouthHavenMiMember 		 
Broadway Road [Member] | Moorpark, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Dec. 16, 2013  
Debt Issued / Encumbrances 1,455,375us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_BroadwayRoadMember
/ us-gaap_StatementGeographicalAxis
= land_MoorparkCaMember 		 
Oregon Trail [Member] | Echo, OR [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Dec. 27, 2013  
Debt Issued / Encumbrances 6,791,748us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_OregonTrailMember
/ us-gaap_StatementGeographicalAxis
= land_EchoORMember 		 
East Shelton [Member] | Willcox, AZ [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Dec. 27, 2013  
Debt Issued / Encumbrances 3,250,336us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstatePropertiesAxis
= land_EastSheltonMember
/ us-gaap_StatementGeographicalAxis
= land_WillcoxAZMember 		 
2014 New Real Estate Activity [Member]    
Real Estate Properties [Line Items]    
Total Acreage 2,039land_AreaOfRealEstatePropertyAcquired
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember 		 
Number of Farms 11land_NumberOfFarmsAcquired
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember 		 
Total Purchase Price 68,328,433us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember 		 
Acquisition Costs 601,559us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember 		 
Annualized Straight-line Rent 3,523,666land_AnnualizedStraightLineRentEscalations
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember 		 
Debt Issued / Encumbrances 34,680,192us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember 		 
2014 New Real Estate Activity [Member] | McIntosh Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jun. 20, 2014  
2014 New Real Estate Activity [Member] | Collins Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date May 30, 2014  
2014 New Real Estate Activity [Member] | Spring Valley [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jun. 13, 2014  
2014 New Real Estate Activity [Member] | Naumann Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jul. 23, 2014  
2014 New Real Estate Activity [Member] | Sycamore Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jul. 25, 2014  
2014 New Real Estate Activity [Member] | Wauchula Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Sep. 29, 2014  
2014 New Real Estate Activity [Member] | Santa Clara Avenue [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Oct. 29, 2014  
2014 New Real Estate Activity [Member] | Dufau Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Nov. 04, 2014  
2014 New Real Estate Activity [Member] | Strawberries [Member] | McIntosh Road [Member] | Dover, FL [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jun. 20, 2014  
Total Acreage 94land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_McintoshRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DoverFlMember 		 
Number of Farms 2land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_McintoshRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DoverFlMember 		 
Lease Term 3 years  
Renewal Options 3 years  
Total Purchase Price 2,666,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_McintoshRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DoverFlMember 		 
Acquisition Costs 60,939us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_McintoshRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DoverFlMember 		 
Annualized Straight-line Rent 133,154land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_McintoshRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DoverFlMember 		 
Debt Issued / Encumbrances 1,599,600us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_McintoshRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DoverFlMember 		 
2014 New Real Estate Activity [Member] | Blueberries [Member] | Collins Road [Member] | Clatskanie, OR [Member]    
Real Estate Properties [Line Items]    
Acquisition Date May 30, 2014  
Total Acreage 200land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_CollinsRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ClatskanieOrMember 		 
Number of Farms 2land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_CollinsRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ClatskanieOrMember 		 
Lease Term 10 years 3 months 18 days  
Renewal Options 5 years  
Total Purchase Price 2,591,333us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_CollinsRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ClatskanieOrMember 		 
Acquisition Costs 60,869us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_CollinsRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ClatskanieOrMember 		 
Annualized Straight-line Rent 181,172land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_CollinsRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ClatskanieOrMember 		 
2014 New Real Estate Activity [Member] | Strawberries, Misc. Vegetables and Lilies [Member] | Spring Valley [Member] | Watsonville, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jun. 13, 2014  
Total Acreage 145land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndLiliesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WatsonvilleCaMember 		 
Number of Farms 1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndLiliesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WatsonvilleCaMember 		 
Lease Term 2 years 3 months 18 days  
Total Purchase Price 5,900,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndLiliesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WatsonvilleCaMember 		 
Acquisition Costs 49,582us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndLiliesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WatsonvilleCaMember 		 
Annualized Straight-line Rent 270,901land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndLiliesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WatsonvilleCaMember 		 
Debt Issued / Encumbrances 2,862,237us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndLiliesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WatsonvilleCaMember 		 
2014 New Real Estate Activity [Member] | Strawberries and Raspberries [Member] | Naumann Road [Member] | Oxnard, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jul. 23, 2014  
Total Acreage 68land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NaumannRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Number of Farms 1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NaumannRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Lease Term 3 years  
Renewal Options 3 years  
Total Purchase Price 6,888,500us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NaumannRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Acquisition Costs 91,103us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NaumannRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Annualized Straight-line Rent 329,667land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NaumannRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Debt Issued / Encumbrances 3,342,510us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NaumannRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
2014 New Real Estate Activity [Member] | Misc. Vegetables and Grain [Member] | Sycamore Road [Member] | Arvin, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Jul. 25, 2014  
Total Acreage 326land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_MiscellaneousVegetablesAndGrainMember
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ArvinCaMember 		 
Number of Farms 1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_MiscellaneousVegetablesAndGrainMember
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ArvinCaMember 		 
Lease Term 1 year 3 months 18 days  
Total Purchase Price 5,800,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_MiscellaneousVegetablesAndGrainMember
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ArvinCaMember 		 
Acquisition Costs 44,434us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_MiscellaneousVegetablesAndGrainMember
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ArvinCaMember 		 
Annualized Straight-line Rent 184,304land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_MiscellaneousVegetablesAndGrainMember
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ArvinCaMember 		 
Debt Issued / Encumbrances 2,813,724us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_ProductOrServiceAxis
= land_MiscellaneousVegetablesAndGrainMember
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_ArvinCaMember 		 
2014 New Real Estate Activity [Member] | Strawberries, Misc. Vegetables, and Melons [Member] | Wauchula Road [Member] | Duette, FL [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Sep. 29, 2014  
Total Acreage 808land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndMelonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember 		 
Number of Farms 1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndMelonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember 		 
Lease Term 10 years  
Renewal Options 5 years  
Total Purchase Price 13,765,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndMelonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember 		 
Acquisition Costs 132,555us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndMelonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember 		 
Annualized Straight-line Rent 888,439land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndMelonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember 		 
Debt Issued / Encumbrances 8,259,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesMiscellaneousVegetablesAndMelonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_DuetteFlMember 		 
2014 New Real Estate Activity [Member] | Strawberries and Misc. Vegetables [Member] | Santa Clara Avenue [Member] | Oxnard, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Oct. 29, 2014  
Total Acreage 333land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SantaClaraAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Number of Farms 2land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SantaClaraAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Lease Term 9 months 18 days  
Renewal Options 2 years  
Total Purchase Price 24,592,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SantaClaraAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Acquisition Costs 100,603us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SantaClaraAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Annualized Straight-line Rent 1,231,422land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SantaClaraAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Debt Issued / Encumbrances 12,128,121us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SantaClaraAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
2014 New Real Estate Activity [Member] | Strawberries and Misc. Vegetables [Member] | Dufau Road [Member] | Oxnard, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date Apr. 11, 2014  
Total Acreage 65land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_DufauRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Number of Farms 1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_DufauRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Lease Term 3 years  
Renewal Options 3 years  
Total Purchase Price 6,125,600us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_DufauRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Acquisition Costs 61,474us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_DufauRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Annualized Straight-line Rent 304,607land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_DufauRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
Debt Issued / Encumbrances 3,675,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndMiscellaneousVegetablesMember
/ us-gaap_RealEstatePropertiesAxis
= land_DufauRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFourteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_OxnardCaMember 		 
2013 New Real Estate Activity [Member]    
Real Estate Properties [Line Items]    
Total Acreage   4,370land_AreaOfRealEstatePropertyAcquired
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
Number of Farms   9land_NumberOfFarmsAcquired
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
Total Purchase Price   37,306,120us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
Acquisition Costs   520,417us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
Annualized Straight-line Rent   2,070,955land_AnnualizedStraightLineRentEscalations
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
2013 New Real Estate Activity [Member] | Natividad Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Oct. 21, 2013
2013 New Real Estate Activity [Member] | 38th Avenue [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Apr. 05, 2013
2013 New Real Estate Activity [Member] | Sequoia Street [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   May 31, 2013
2013 New Real Estate Activity [Member] | 20th Avenue [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   May 11, 2013
2013 New Real Estate Activity [Member] | Broadway Road [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Dec. 16, 2013
2013 New Real Estate Activity [Member] | Oregon Trail [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Dec. 27, 2013
2013 New Real Estate Activity [Member] | East Shelton [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Dec. 27, 2013
2013 New Real Estate Activity [Member] | Blueberries [Member] | 38th Avenue [Member] | Covert, MI [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Apr. 05, 2013
Total Acreage   119land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ThirtyEightAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_CovertMiMember
Number of Farms   1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ThirtyEightAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_CovertMiMember
Lease Term   7 years
Renewal Options   7 years
Total Purchase Price   1,341,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ThirtyEightAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_CovertMiMember
Acquisition Costs   38,200us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ThirtyEightAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_CovertMiMember
Annualized Straight-line Rent   87,286land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_ThirtyEightAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_CovertMiMember
2013 New Real Estate Activity [Member] | Blueberries [Member] | Sequoia Street [Member] | Brooks, OR [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   May 31, 2013
Total Acreage   218land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SequoiaStreetMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_BrooksOrMember
Number of Farms   1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SequoiaStreetMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_BrooksOrMember
Lease Term   15 years
Renewal Options   5 years
Total Purchase Price   3,100,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SequoiaStreetMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_BrooksOrMember
Acquisition Costs   108,211us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SequoiaStreetMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_BrooksOrMember
Annualized Straight-line Rent   193,617land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_SequoiaStreetMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_BrooksOrMember
2013 New Real Estate Activity [Member] | Blueberries [Member] | 20th Avenue [Member] | South Haven, MI [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Nov. 05, 2013
Total Acreage   151land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_TwentiethAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SouthHavenMiMember
Number of Farms   3land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_TwentiethAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SouthHavenMiMember
Lease Term   5 years
Renewal Options   5 years
Total Purchase Price   1,985,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_TwentiethAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SouthHavenMiMember
Acquisition Costs   34,479us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_TwentiethAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SouthHavenMiMember
Annualized Straight-line Rent   129,755land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_BlueberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_TwentiethAvenueMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SouthHavenMiMember
2013 New Real Estate Activity [Member] | Strawberries and Raspberries [Member] | Natividad Road [Member] | Salinas, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Oct. 21, 2013
Total Acreage   166land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NatividadRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Number of Farms   1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NatividadRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Lease Term   2 years
Total Purchase Price   7,325,120us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NatividadRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Acquisition Costs   47,850us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NatividadRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
Annualized Straight-line Rent   439,575land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_StrawberriesAndRaspberriesMember
/ us-gaap_RealEstatePropertiesAxis
= land_NatividadRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_SalinasCaMember
2013 New Real Estate Activity [Member] | Lemons [Member] | Broadway Road [Member] | Moorpark, CA [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Dec. 16, 2013
Total Acreage   60land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_LemonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_BroadwayRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_MoorparkCaMember
Number of Farms   1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_LemonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_BroadwayRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_MoorparkCaMember
Lease Term   10 years
Renewal Options   10 years
Total Purchase Price   3,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_LemonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_BroadwayRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_MoorparkCaMember
Acquisition Costs   27,528us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_LemonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_BroadwayRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_MoorparkCaMember
Annualized Straight-line Rent   171,958land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_LemonsMember
/ us-gaap_RealEstatePropertiesAxis
= land_BroadwayRoadMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_MoorparkCaMember
2013 New Real Estate Activity [Member] | Corn, Onions And Potatoes [Member] | Oregon Trail [Member] | Echo, OR [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Dec. 27, 2013
Total Acreage   1,895land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_CornOnionsAndPotatoesMember
/ us-gaap_RealEstatePropertiesAxis
= land_OregonTrailMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_EchoORMember
Number of Farms   1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_CornOnionsAndPotatoesMember
/ us-gaap_RealEstatePropertiesAxis
= land_OregonTrailMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_EchoORMember
Lease Term   10 years
Renewal Options   5 years
Total Purchase Price   13,855,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_CornOnionsAndPotatoesMember
/ us-gaap_RealEstatePropertiesAxis
= land_OregonTrailMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_EchoORMember
Acquisition Costs   213,458us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_CornOnionsAndPotatoesMember
/ us-gaap_RealEstatePropertiesAxis
= land_OregonTrailMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_EchoORMember
Annualized Straight-line Rent   758,480land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_CornOnionsAndPotatoesMember
/ us-gaap_RealEstatePropertiesAxis
= land_OregonTrailMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_EchoORMember
2013 New Real Estate Activity [Member] | Corn And Dry Edible Beans [Member] | East Shelton [Member] | Willcox, AZ [Member]    
Real Estate Properties [Line Items]    
Acquisition Date   Dec. 27, 2013
Total Acreage   1,761land_AreaOfRealEstatePropertyAcquired
/ us-gaap_ProductOrServiceAxis
= land_CornAndDryEdibleBeansMember
/ us-gaap_RealEstatePropertiesAxis
= land_EastSheltonMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WillcoxAZMember
Number of Farms   1land_NumberOfFarmsAcquired
/ us-gaap_ProductOrServiceAxis
= land_CornAndDryEdibleBeansMember
/ us-gaap_RealEstatePropertiesAxis
= land_EastSheltonMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WillcoxAZMember
Lease Term   10 years
Total Purchase Price   6,700,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_ProductOrServiceAxis
= land_CornAndDryEdibleBeansMember
/ us-gaap_RealEstatePropertiesAxis
= land_EastSheltonMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WillcoxAZMember
Acquisition Costs   50,691us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
/ us-gaap_ProductOrServiceAxis
= land_CornAndDryEdibleBeansMember
/ us-gaap_RealEstatePropertiesAxis
= land_EastSheltonMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WillcoxAZMember
Annualized Straight-line Rent   290,284land_AnnualizedStraightLineRentEscalations
/ us-gaap_ProductOrServiceAxis
= land_CornAndDryEdibleBeansMember
/ us-gaap_RealEstatePropertiesAxis
= land_EastSheltonMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandThirteenNewRealEstateActivityMember
/ us-gaap_StatementGeographicalAxis
= land_WillcoxAZMember