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Segment Information, Nature of Operations, and Certain Concentrations - Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | ---
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | $ 2,515,131 | $ 2,351,335 |  |
Cash and cash equivalents | 425,316 | 545,419 | $ 866,253 | $ 1,153,507
Contract land deposit reserve | (42,239) | (56,074) |  |
Homebuilding [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 2,135,581 | 2,088,019 |  |
Consolidated variable interest entity | 1,749 | 3,590 |  |
Cash and cash equivalents | 397,522 | 514,780 |  |
Deferred taxes | 161,805 | 165,189 |  |
Intangible assets and goodwill | 3,982 | 5,364 |  |
Mortgage Banking [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 379,550 | 263,316 |  |
Cash and cash equivalents | 26,804 | 30,158 |  |
Operating Segments [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 1,895,779 | 1,615,009 |  |
Operating Segments [Member] | Homebuilding [Member] | Mid Atlantic [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 994,804 | 917,689 |  |
Operating Segments [Member] | Homebuilding [Member] | North East [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 133,106 | 103,631 |  |
Operating Segments [Member] | Homebuilding [Member] | Mid East [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 220,094 | 192,781 |  |
Operating Segments [Member] | Homebuilding [Member] | South East [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 175,572 | 144,939 |  |
Operating Segments [Member] | Mortgage Banking [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 372,203 | 255,969 |  |
Reconciling Items [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 619,352 | 736,326 |  |
Consolidated variable interest entity | 1,749 | 3,590 |  |
Cash and cash equivalents | 397,522 | 514,780 |  |
Deferred taxes | 161,805 | 165,189 |  |
Intangible assets and goodwill | 52,909 | 54,291 |  |
Contract land deposit reserve | (42,239) | (56,074) |  |
Consolidation adjustments and other | $ 47,606 | $ 54,550 |  |

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