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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 ($)
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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%

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