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Fair Value - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Total fair value measurement gain/(loss) |  | $ (28,021) |  | $ 18,237
Home Building Segment |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Senior Notes carrying value | $ 915,346 | 915,346 |  | 1,516,255
Home Building Segment | Senior Notes due 2022 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Senior Notes carrying value | 0 | 0 |  | 599,553
Home Building Segment | 3.00% Senior Notes due 2030 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Senior Notes carrying value | 915,346 | 915,346 |  | 916,702
Home Building Segment | Senior Notes |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Senior Notes carrying value | 915,346 | 915,346 |  | 1,516,255
Home Building Segment | Level 2 | Fair Value, Recurring | Senior Notes due 2022 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Senior Notes fair value | 0 | 0 |  | 610,452
Home Building Segment | Level 2 | Fair Value, Recurring | 3.00% Senior Notes due 2030 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Senior Notes fair value | 735,804 | 735,804 |  | 942,192
Home Building Segment | Level 2 | Fair Value, Recurring | Senior Notes |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Senior Notes fair value | 735,804 | 735,804 |  | 1,552,644
Mortgage Banking | Level 2 | Not Designated as Hedging Instrument |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value adjustment income (expense) | 28,828 | 46,258 |  |
Mortgage Banking | Level 2 | Fair Value, Recurring | Rate Lock Commitments |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 2,213,239 | 2,213,239 |  |
Total fair value measurement gain/(loss) |  | (52,002) |  |
Mortgage Banking | Level 2 | Fair Value, Recurring | Forward Sales Contracts |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 2,446,322 | 2,446,322 |  |
Total fair value measurement gain/(loss) |  | 38,388 |  |
Mortgage Banking | Level 2 | Fair Value, Recurring | Mortgages Held for Sale |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trade and loans receivables held-for-sale, net, not part of disposal group | 316,094 | 316,094 |  | $ 302,192
Fair Value, principal amount, loans held for sale | $ 330,501 | 330,501 | $ 297,896 |
Fair value, option, changes in fair value, gain (loss) |  | $ (14,407) | $ 4,296 |

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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