Description of the frequency of periodic payments (monthly, quarterly, annual).

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Contractual interest rate for funds borrowed, under the debt agreement.

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Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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Amount of long-term debt and capital lease obligations including current maturities.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Long-Term Debt - Notes Payable Landwell - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	May 31, 2012
Debt Instrument [Line Items]
Total debt	$ 934,100,000	$ 752,500,000
LandWell \| Note payable to the City of Henderson
Debt Instrument [Line Items]
Debt instrument			3,900,000
Periodic principal payments	250,000
Interest rate terms	The loan bears interest at a 3% fixed rate.
Promissory note maturity date	Dec. 31, 2020
Frequency of debt instrument payment	Semi-Annual
Long-term promissory note fixed interest rate	3.00%
Total debt	$ 3,100,000