Accounts Payable and Accrued Liabilities - Additional Information (Detail) - Basic Management Inc And LandWell - Deferred Payment - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Present Value
Accounts Payable And Accrued Liabilities [Line Items]
Discount rate	3.00%
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%

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration