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Segment Disclosures - Additional Information (Detail) - segment | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Sep. 10, 2012
Senior Notes due 2022 [Member] |  |
Segment Reporting Information [Line Items] |  |
Senior notes interest rate | 3.95% | 3.95%
Home Building [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of reportable segments | 4 |
Mortgage Banking [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of reportable segments | 1 |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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- Details
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