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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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