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Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | $ 3,362,771 |  | $ 3,165,933
Operating Lease, Right-of-Use Asset |  | $ 79 |
Contract land deposit reserve | (28,266) |  | (29,216)
Home Building [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 2,868,276 |  | 2,641,511
Cash and cash equivalents | 805,195 |  | 688,783
Operating Lease, Right-of-Use Asset | 65,519 |  | 0
Mortgage Banking [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 494,495 |  | 524,422
Cash and cash equivalents | 11,258 |  | 23,092
Operating Lease, Right-of-Use Asset | 12,370 |  | 0
Operating Segments [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 2,304,270 |  | 2,303,723
Operating Segments [Member] | Home Building [Member] | Mid Atlantic [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 1,043,004 |  | 1,018,953
Operating Segments [Member] | Home Building [Member] | North East [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 146,750 |  | 144,412
Operating Segments [Member] | Home Building [Member] | Mid East [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 294,293 |  | 290,815
Operating Segments [Member] | Home Building [Member] | South East [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 333,075 |  | 332,468
Operating Segments [Member] | Mortgage Banking [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 487,148 |  | 517,075
Corporate and Reconciling Items [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 1,058,501 |  | 862,210
Cash and cash equivalents | 805,195 |  | 688,783
Deferred taxes | 115,160 |  | 112,333
Intangible assets and goodwill | 49,950 |  | 49,989
Operating Lease, Right-of-Use Asset | 65,519 |  | 0
Contract land deposit reserve | (28,266) |  | (29,216)
Consolidation adjustments and other | $ 50,943 |  | $ 40,321

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