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Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | $ 3,089,823 | $ 2,989,279
Contract land deposit reserve | (27,968) | (29,999)
Home Building [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 2,716,614 | 2,584,880
Cash and cash equivalents | 598,789 | 645,087
Mortgage Banking [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 373,209 | 404,399
Cash and cash equivalents | 11,081 | 21,707
Operating Segments [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 2,289,437 | 2,160,009
Operating Segments [Member] | Home Building [Member] | Mid Atlantic [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 1,098,095 | 1,079,225
Operating Segments [Member] | Home Building [Member] | North East [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 160,541 | 143,008
Operating Segments [Member] | Home Building [Member] | Mid East [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 324,253 | 263,019
Operating Segments [Member] | Home Building [Member] | South East [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 340,686 | 277,705
Operating Segments [Member] | Mortgage Banking [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 365,862 | 397,052
Corporate and Reconciling Items [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 800,386 | 829,270
Cash and cash equivalents | 598,789 | 645,087
Deferred taxes | 115,824 | 111,953
Intangible assets and goodwill | 50,028 | 50,144
Contract land deposit reserve | (27,968) | (29,999)
Consolidation adjustments and other | $ 63,713 | $ 52,085

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