XML 45 R30.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Summary of Significant Accounting Policies - Reconciliation between U.S. Statutory Federal Income Tax Rate and Effective Income Tax Rate (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2013 USD ($)
Accounting Policies [Abstract] |
Income tax provision on deferred intercompany gains | $ 2,100,000
Benefit of REIT conversion | $ 743,676

X
- Definition Benefit from real estate investment trust conversion. + References No definition available. + Details
Name: | land_BenefitFromRealEstateInvestmentTrustConversion
Namespace Prefix: | land_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Income tax provision on deferred intercompany gains. + References No definition available. + Details
Name: | land_IncomeTaxProvisionOnDeferredIntercompanyGains
Namespace Prefix: | land_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration