Face (par) amount of debt instrument at time of issuance.

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Net increase or decrease in the carrying amount of the debt instrument for the 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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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Amount of interest capitalized during the period.

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Total interest costs incurred during the period and either capitalized or charged against earnings.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Debt (Details) - USD ($)	1 Months Ended	3 Months Ended
Debt (Details) - USD ($)	Jan. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Jun. 12, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt		$ 373,068,000			$ 365,749,000
Unamortized debt issuance costs		3,100,000			3,500,000
Interest costs incurred		5,200,000	$ 4,600,000
Interest costs capitalized		1,300,000	$ 2,100,000
Goldman Sachs loan
Debt Instrument [Line Items]
Debt		140,643,000			141,184,000
The Santal loan
Debt Instrument [Line Items]
Debt		74,065,000			73,972,000
Comerica Bank credit facility
Debt Instrument [Line Items]
Debt		49,300,000			42,482,000
Comerica Bank credit facility \| Line of credit
Debt Instrument [Line Items]
Letters of credit committed		150,000
Comerica Bank credit facility \| Line of credit \| Subsequent event
Debt Instrument [Line Items]
Letters of credit committed				$ 150,000
Comerica Bank credit facility \| Line of credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, available borrowing capacity		10,600,000
Credit facility, maximum borrowing capacity		60,000,000.0
Comerica Bank credit facility \| Line of credit \| Revolving Credit Facility \| Subsequent event
Debt Instrument [Line Items]
Credit facility, available borrowing capacity				25,000,000.0
Credit facility, maximum borrowing capacity				$ 60,000,000.0
Amarra Villas credit facility
Debt Instrument [Line Items]
Debt		5,000			5,520,000
New Caney land loan
Debt Instrument [Line Items]
Debt		4,918,000			4,908,000
Lantana Place
Debt Instrument [Line Items]
Debt		23,283,000			23,268,000
Jones Crossing
Debt Instrument [Line Items]
Debt		21,669,000			21,354,000
The Saint Mary Construction Loan [Member]
Debt Instrument [Line Items]
Debt		24,991,000			21,857,000
Kingwood Place
Debt Instrument [Line Items]
Debt		26,983,000			23,991,000
Kingwood Place \| Notes Payable to Banks [Member] \| Stratus Kingwood, L.P. [Member]
Debt Instrument [Line Items]
Debt Instrument, Increase (Decrease), Net	$ 2,500,000
Debt principal	$ 35,400,000
West Killeen Market
Debt Instrument [Line Items]
Debt		$ 7,211,000			$ 7,213,000