Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Schedule of Distributions On Common Stock (Detail)

v2.4.1.9
Stockholders' Equity - Schedule of Distributions On Common Stock (Detail)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Equity [Abstract]    
Ordinary Income 95.66078%land_OrdinaryIncomeAsPercentageOfDistributions 100.00%land_OrdinaryIncomeAsPercentageOfDistributions
Return of Capital 4.33922%land_PercentageOfReturnOfCapital 0.00%land_PercentageOfReturnOfCapital