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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Significant Accounting Policies [Line Items] |  |  |  |
Cash | $ 425,316,000 | $ 545,419,000 | $ 866,253,000 | $ 1,153,507,000
Pre-tax recovery related to impairment of contract land deposits | 11,058,000 | 225,000 | $ 5,313,000 |
Contract land deposit assets impairment valuation allowances | $ 42,239,000 | 56,074,000 |  |
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 | $ 397,522,000 | 514,780,000 |  |
Restricted cash | 23,440,000 | 24,106,000 |  |
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 | $ 3,541,000 | 4,923,000 |  |
Weighted average life of finite-lived intangible assets | 4 years |  |  |
Mortgage Banking [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Cash | $ 26,804,000 | 30,158,000 |  |
Restricted cash | $ 2,038,000 | 1,947,000 |  |
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 | $ 462,329,000 |  |  |
Mortgage Banking [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Forward Sales Contracts [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Notional or Principal Amount | 737,052,000 |  |  |
Consolidated Joint Venture |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Cash | $ 990,000 | 481,000 |  |
Restricted cash |  | $ 160,000 |  |

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