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Accounts Payable and Accrued Liabilities - Additional Information (Detail) - Basic Management Inc And LandWell - Deferred Payment
$ in Millions
Dec. 31, 2014
Dec. 31, 2013
USD ($)
Present Value | Measurement Input, Discount Rate    
Accounts Payable And Accrued Liabilities [Line Items]    
Discount rate 0.03  
Real Estate Management And Development | Face Value    
Accounts Payable And Accrued Liabilities [Line Items]    
Business combination consideration transferred, deferred payment obligation   $ 11.1
Interest rate   3.00%