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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Significant Accounting Policies [Line Items] |  |  |  |
Cash | $ 396,619,000 | $ 425,316,000 | $ 545,419,000 | $ 866,253,000
Pre-tax recovery related to impairment of contract land deposits, net | 4,269,000 | 11,058,000 | $ 225,000 |
Contract land deposit assets impairment valuation allowances | $ 31,306,000 | 42,239,000 |  |
Senior Notes due 2022 [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Senior notes interest rate | 3.95% |  |  |
Senior notes maturity date | Sep. 15, 2022 |  |  |
Model Home Furniture and Fixtures [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 2 years |  |  |
Office Facilities and Other [Member] | Minimum [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |  |
Office Facilities and Other [Member] | Maximum [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |  |
Manufacturing Facilities [Member] | Minimum [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |  |
Manufacturing Facilities [Member] | Maximum [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |  |
Homebuilding [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Cash | $ 375,748,000 | 397,522,000 |  |
Restricted cash | 17,561,000 | 23,440,000 |  |
Impairment of goodwill | 0 |  |  |
Homebuilding [Member] | Heartland Homes Inc [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Goodwill acquired from business acquisition | 441,000 | 441,000 |  |
Finite-lived intangibles acquired from business acquisition, net of accumulated amortization | $ 2,158,000 | 3,541,000 |  |
Weighted average life of finite-lived intangible assets | 3 years |  |  |
Mortgage Banking [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Cash | $ 19,657,000 | 26,804,000 |  |
Restricted cash | $ 1,857,000 | 2,038,000 |  |
Mortgage Banking [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Typical length of days loans sold into secondary market | 30 days |  |  |
Mortgage Banking [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Rate Lock Commitments [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Notional or Principal Amount | $ 458,161,000 |  |  |
Mortgage Banking [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Forward Sales Contracts [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Notional or Principal Amount | 738,637,000 |  |  |
Consolidated Joint Venture |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Cash | $ 1,214,000 | $ 990,000 |  |

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