Segment Disclosures - Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Revenue Reconciling Item [Line Items]
Total consolidated revenues	$ 1,388,183	$ 1,243,633	$ 2,532,209	$ 2,201,382
Homebuilding [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	1,361,741	1,221,111	2,483,245	2,162,649
Homebuilding [Member] \| Mid Atlantic [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	772,147	746,168	1,405,718	1,302,288
Homebuilding [Member] \| North East [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	108,766	114,375	205,919	197,368
Homebuilding [Member] \| Mid East [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	306,257	221,083	550,534	406,512
Homebuilding [Member] \| South East [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	174,571	139,485	321,074	256,481
Mortgage Banking [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Mortgage Banking	$ 26,442	$ 22,522	$ 48,964	$ 38,733

The noninterest income derived from mortgage banking activities (fees and commissions), excluding fees earned from servicing third-party assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13 (d))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Revenue related to the sale of homes and home building activities including design, development, general contracting, and renovation services for residential buildings, including single-family houses, multifamily housing, townhouses, apartments, and modular housing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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+ References

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