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Segment Information, Nature of Operations, and Certain Concentrations - Profits (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Equity-based compensation expense | $ (34,296) | $ (64,841) | $ (64,473)
Consolidated income before taxes | 418,696 | 275,077 | 207,576
Operating Segments [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated income before taxes | 423,306 | 309,274 | 229,294
Operating Segments [Member] | Homebuilding Mid Atlantic [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated income before taxes | 276,399 | 189,089 | 148,373
Operating Segments [Member] | Homebuilding North East [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated income before taxes | 14,294 | 21,529 | 13,463
Operating Segments [Member] | Homebuilding Mid East [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated income before taxes | 55,537 | 39,847 | 27,194
Operating Segments [Member] | Homebuilding South East [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Consolidated income before taxes | 35,001 | 20,674 | 14,162
Operating Segments [Member] | Mortgage Banking [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Mortgage Banking | 42,075 | 38,135 | 26,102
Reconciling Items Sub-Total [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | (4,610) | (34,197) | (21,718)
Consolidated income before taxes | 418,696 | 275,077 | 207,576
Reconciling Items Sub-Total [Member] | Contract Land Deposit Reserve Adjustment [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | 5,313 | 5,333 | (2,878)
Reconciling Items Sub-Total [Member] | Equity-Based Compensation Expense [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Equity-based compensation expense | (34,296) | (64,841) | (64,473)
Reconciling Items Sub-Total [Member] | Corporate Capital Allocation [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | 116,457 | 91,507 | 71,226
Reconciling Items Sub-Total [Member] | Unallocated Corporate Overhead [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | (72,703) | (70,258) | (45,355)
Reconciling Items Sub-Total [Member] | Consolidation Adjustments and Other [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | 2,362 | 10,858 | 20,477
Reconciling Items Sub-Total [Member] | Corporate Interest Expense [Member] |  |  |
Segment Reporting, Profit Reconciling Item [Line Items] |  |  |
Segment reporting reconciling item for operating profit | $ (21,743) | $ (6,796) | $ (715)

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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 portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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