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Segment Information, Nature of Operations, and Certain Concentrations - Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | $ 2,643,943 | $ 2,511,718 |  |
Cash and cash equivalents | 396,619 | 425,316 | $ 545,419 | $ 866,253
Contract land deposit reserve | (31,306) | (42,239) |  |
Homebuilding [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 2,233,346 | 2,132,168 |  |
Consolidated variable interest entity | 1,251 | 1,749 |  |
Cash and cash equivalents | 375,748 | 397,522 |  |
Deferred taxes | 170,652 | 161,805 |  |
Intangible assets and goodwill | 2,599 | 3,982 |  |
Mortgage Banking [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 410,597 | 379,550 |  |
Cash and cash equivalents | 19,657 | 26,804 |  |
Operating Segments [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 2,021,710 | 1,895,779 |  |
Operating Segments [Member] | Homebuilding [Member] | Mid Atlantic [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 1,054,779 | 994,804 |  |
Operating Segments [Member] | Homebuilding [Member] | North East [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 126,720 | 133,106 |  |
Operating Segments [Member] | Homebuilding [Member] | Mid East [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 222,736 | 220,094 |  |
Operating Segments [Member] | Homebuilding [Member] | South East [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 214,225 | 175,572 |  |
Operating Segments [Member] | Mortgage Banking [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 403,250 | 372,203 |  |
Reconciling Items [Member] |  |  |  |
Segment Reporting Asset Reconciling Item [Line Items] |  |  |  |
Assets | 622,233 | 615,939 |  |
Consolidated variable interest entity | 1,251 | 1,749 |  |
Cash and cash equivalents | 375,748 | 397,522 |  |
Deferred taxes | 170,652 | 161,805 |  |
Intangible assets and goodwill | 51,526 | 52,909 |  |
Contract land deposit reserve | (31,306) | (42,239) |  |
Consolidation adjustments and other | $ 54,362 | $ 44,193 |  |

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