Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Fair Value of Acquired Assets and Liabilities Assumed Related to Properties Acquired (Parenthetical) (Detail)

v2.4.1.9
Real Estate and Intangible Assets - Fair Value of Acquired Assets and Liabilities Assumed Related to Properties Acquired (Parenthetical) (Detail) (2015 New Real Estate Activity [Member], USD $)
3 Months Ended
Mar. 31, 2015
2015 New Real Estate Activity [Member]
 
Business Acquisition Purchase Price Allocation [Line Items]  
Acquisition costs were direct costs incurred related to leases $ 2,625us-gaap_AcquisitionCosts
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= land_TwoThousandFifteenNewRealEstateActivityMember