Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 474,545		$ 329,011
Receivables	87,580		69,276
Intercompany receivables	0		0
Real estate inventories	3,012,622		3,065,436
Investments in unconsolidated entities	36,040		11,745
Goodwill and other intangible assets, net	159,626		159,893
Investments in subsidiaries	0		0
Deferred tax assets, net	39,744		49,904
Other assets	167,747		173,425
Total assets	3,977,904		3,858,690
Liabilities
Accounts payable	71,086		66,120
Intercompany payables	0		0
Accrued expenses and other liabilities	314,818		322,043
Loans payable	250,000		250,000
Senior notes	1,166,189		1,033,985
Total liabilities	1,802,093		1,672,148
Equity
Total stockholders’ equity	2,175,799		2,186,530
Noncontrolling interests	12		12
Total equity	2,175,811	$ 2,115,293	2,186,542	$ 2,086,643	$ 2,057,036	$ 2,056,937
Total liabilities and equity	3,977,904		3,858,690
Reporting Entity | Issuer
Assets
Cash and cash equivalents	393,481		186,200
Receivables	27,555		26,016
Intercompany receivables	421,075		576,846
Real estate inventories	699,708		737,662
Investments in unconsolidated entities	0		0
Goodwill and other intangible assets, net	156,604		156,604
Investments in subsidiaries	1,968,697		1,870,885
Deferred tax assets, net	9,021		9,020
Other assets	5,192		14,676
Total assets	3,681,333		3,577,909
Liabilities
Accounts payable	16,911		14,915
Intercompany payables	0		0
Accrued expenses and other liabilities	72,434		92,479
Loans payable	250,000		250,000
Senior notes	1,166,189		1,033,985
Total liabilities	1,505,534		1,391,379
Equity
Total stockholders’ equity	2,175,799		2,186,530
Noncontrolling interests	0		0
Total equity	2,175,799		2,186,530
Total liabilities and equity	3,681,333		3,577,909
Reporting Entity | Guarantor Subsidiaries
Assets
Cash and cash equivalents	81,064		142,811
Receivables	60,025		43,260
Intercompany receivables	0		0
Real estate inventories	2,312,914		2,327,774
Investments in unconsolidated entities	36,040		11,745
Goodwill and other intangible assets, net	3,022		3,289
Investments in subsidiaries	0		0
Deferred tax assets, net	30,723		40,884
Other assets	162,555		158,749
Total assets	2,686,343		2,728,512
Liabilities
Accounts payable	54,175		51,205
Intercompany payables	421,075		576,846
Accrued expenses and other liabilities	242,384		229,564
Loans payable	0		0
Senior notes	0		0
Total liabilities	717,634		857,615
Equity
Total stockholders’ equity	1,968,697		1,870,885
Noncontrolling interests	12		12
Total equity	1,968,709		1,870,897
Total liabilities and equity	2,686,343		2,728,512
Consolidating Adjustments
Assets
Cash and cash equivalents	0		0
Receivables	0		0
Intercompany receivables	(421,075)		(576,846)
Real estate inventories	0		0
Investments in unconsolidated entities	0		0
Goodwill and other intangible assets, net	0		0
Investments in subsidiaries	(1,968,697)		(1,870,885)
Deferred tax assets, net	0		0
Other assets	0		0
Total assets	(2,389,772)		(2,447,731)
Liabilities
Accounts payable	0		0
Intercompany payables	(421,075)		(576,846)
Accrued expenses and other liabilities	0		0
Loans payable	0		0
Senior notes	0		0
Total liabilities	(421,075)		(576,846)
Equity
Total stockholders’ equity	(1,968,697)		(1,870,885)
Noncontrolling interests	0		0
Total equity	(1,968,697)		(1,870,885)
Total liabilities and equity	$ (2,389,772)		$ (2,447,731)