Cost of asset in entitled developed and under development projects.

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Cumulative Reimbursable Cost Associated With Real Estate Projects In Development

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Number of units of multifamily project.

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Number of Community Development Projects

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Number of Hotel Rooms

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Number of Multifamily Sites

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Real Estate Property Sale Price

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Return of reimbursements received in relation to direct costs and expenses previously paid or incurred for development of real estate projects

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Cash received for the sale of real estate that is not part of an investing activity during the current period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Return of or reimbursements received in relation to direct costs and expenses previously paid or incurred.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Real Estate - Additional Information (Detail)	3 Months Ended		6 Months Ended
Real Estate - Additional Information (Detail)	Jun. 30, 2016 USD ($) property room community_development_project multifamily_site	Mar. 31, 2016 USD ($) property	Jun. 30, 2016 USD ($) property room	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Real Estate Properties [Line Items]
Non-cash impairment charges			$ 49,438,000	$ 25,764,000
Number of community development projects \| community_development_project	5
Number of multifamily sites \| multifamily_site	1
Gain on sale of assets			106,658,000	2,014,000
Payment of debt			307,491,000	4,925,000
Reimbursements from utility and improvement districts			(306,000)	$ (7,154,000)
Utility and Improvement District [Member]
Real Estate Properties [Line Items]
Cost of asset in developed and under development projects	$ 69,675,000		69,675,000		$ 67,554,000
Reimbursements from utility and improvement districts			306,000
San Antonio, Texas \| Cibolo Canyons Project
Real Estate Properties [Line Items]
Cost of asset in developed and under development projects	23,062,000		23,062,000		$ 22,302,000
Cumulative reimbursable cost associated with real estate projects in development	54,376,000		54,376,000
Return of reimbursements received in relation to direct costs and expenses previously paid or incurred for development of real estate projects	$ 34,703,000		$ 34,703,000
Music Row \| Nashville, Tennessee
Real Estate Properties [Line Items]
Real estate property sale price		$ 15,025,000
Gain on sale of assets		3,968,000
Net proceeds		$ 14,703,000
Music Row \| Nashville, Tennessee \| Multi Family Property
Real Estate Properties [Line Items]
Number of units of multifamily project \| property		230
Eleven \| Austin, Texas \| Multi Family Property
Real Estate Properties [Line Items]
Number of units of multifamily project \| property	257		257
Gain on sale of assets			$ 9,116,000
Purchase price of properties sold	$ 60,150,000		$ 60,150,000
Net proceeds	59,719,000
Payment of debt	$ 23,936,000
Dillon \| Charlotte, North Carolina \| Multi Family Property
Real Estate Properties [Line Items]
Number of units of multifamily project \| property	379		379
Gain on sale of assets	$ 1,229,000
Purchase price of properties sold	25,979,000		$ 25,979,000
Net proceeds	25,433,000
Radisson Hotel & Suites, Austin \| Austin, Texas
Real Estate Properties [Line Items]
Gain on sale of assets	$ 95,336,000
Number of hotel rooms \| room	413		413
Purchase price of properties sold	$ 130,000,000		$ 130,000,000
Net proceeds	128,764,000
Payment of debt	15,400,000
Community Development Project
Real Estate Properties [Line Items]
Non-cash impairment charges	$ 48,826,000