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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