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Segment Information, Nature of Operations, and Certain Concentrations - Profit (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated Income before Taxes | $ 275,077 | $ 207,576 | $ 322,393
Mortgage Banking | 38,135 | 26,102 | 35,704
Equity-based compensation expense | (64,841) | (64,473) | (53,136)
Reportable Segment [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated Income before Taxes | 309,274 | 229,294 | 338,042
Contract land deposit reserve adjustment [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | 5,333 | (2,878) | 16,206
Corporate capital allocation [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | 91,507 | 71,226 | 65,971
Unallocated corporate overhead [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | (70,258) | (45,355) | (55,992)
Consolidation adjustments and other [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | 10,858 | 20,477 | 15,848
Corporate interest expense [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | (6,796) | (715) | (4,546)
Reconciling items sub-total [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | (34,197) | (21,718) | (15,649)
Homebuilding Mid Atlantic [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated Income before Taxes | 189,089 | 148,373 | 209,496
Homebuilding North East [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated Income before Taxes | 21,529 | 13,463 | 25,090
Homebuilding Mid East [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated Income before Taxes | 39,847 | 27,194 | 56,882
Homebuilding South East [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated Income before Taxes | $ 20,674 | $ 14,162 | $ 10,870

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- Definition Mortgage banking income from continuing operations before stock-based compensation expense and income taxes. + References No definition available. + Details
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- Definition Amount of an item in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, discontinued operations. + References No definition available. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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