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Land Under Development - Additional Information (Detail) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2017 USD ($) lot | Dec. 31, 2017 USD ($) lot parcel | Dec. 31, 2016 USD ($) lot parcel
Real Estate [Abstract] |  |  |
Acquisition costs of land under development and finished lots | $ 14,800 |  |
Number of finished lots for use in homebuilding operations | lot | 150 | 500 | 600
Number of raw parcels of land owned | parcel |  | 4 | 4
Carrying value of raw parcels of land |  | $ 34,212 | $ 46,999
Aggregate additional funding commitments related to raw land property under joint development |  | 7,900 |
Expected development credits that will offset the aggregate additional funding commitments related to raw land property development |  | $ 4,700 |

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- Definition Carrying amount as of the balance sheet date, net of valuation allowances and impairment losses, of costs of land expected to be developed in the near term plus capitalized costs of development, for purposes of selling completed units to home buyers or commercial or industrial entities.. + 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 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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