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Long-Term Debt - Notes Payable Landwell - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2014
Debt Instrument [Line Items] |  |  |
Notes payable outstanding | $ 1,043,100,000 | $ 893,800,000 |
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. |  |
Debt instrument maturity date | Dec. 31, 2020 |  |
Frequency of debt instrument payment | semi-annual |  |
Long-term promissory note fixed interest rate | 3.00% |  |
Notes payable outstanding | $ 2,500,000 |  |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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