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Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | $ 3,009,395 | $ 2,989,279
Contract land deposit reserve | (27,279) | (29,999)
Homebuilding [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 2,553,269 | 2,584,880
Cash and cash equivalents | 417,341 | 645,087
Mortgage Banking [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 456,126 | 404,399
Cash and cash equivalents | 14,209 | 21,707
Operating Segments [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 2,382,143 | 2,160,009
Operating Segments [Member] | Homebuilding [Member] | Mid Atlantic [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 1,139,958 | 1,079,225
Operating Segments [Member] | Homebuilding [Member] | North East [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 155,089 | 143,008
Operating Segments [Member] | Homebuilding [Member] | Mid East [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 322,718 | 263,019
Operating Segments [Member] | Homebuilding [Member] | South East [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 315,599 | 277,705
Operating Segments [Member] | Mortgage Banking [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 448,779 | 397,052
Corporate and Reconciling Items [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 627,252 | 829,270
Cash and cash equivalents | 417,341 | 645,087
Deferred taxes | 116,295 | 111,953
Intangible assets and goodwill | 50,066 | 50,144
Contract land deposit reserve | (27,279) | (29,999)
Consolidation adjustments and other | $ 70,829 | $ 52,085

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