Segment Disclosures - Profit before Taxes (Detail) (USD $) | 3 Months Ended |
In Thousands, unless otherwise specified | Mar. 31, 2015 | Mar. 31, 2014 |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | $62,363 | $49,707 |
Corporate Capital Allocation [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | 36,945 | 28,966 |
Homebuilding Mid Atlantic [Member] | Corporate Capital Allocation [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | 23,411 | 18,156 |
Homebuilding North East [Member] | Corporate Capital Allocation [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | 3,310 | 2,449 |
Homebuilding Mid East [Member] | Corporate Capital Allocation [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | 5,935 | 5,298 |
Homebuilding South East [Member] | Corporate Capital Allocation [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | 4,289 | 3,063 |
Mortgage Banking [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 5,779 | 991 |
Operating Segments [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 73,052 | 56,955 |
Operating Segments [Member] | Homebuilding Mid Atlantic [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 44,566 | 41,012 |
Operating Segments [Member] | Homebuilding North East [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 5,983 | 6,306 |
Operating Segments [Member] | Homebuilding Mid East [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 7,063 | -249 |
Operating Segments [Member] | Homebuilding South East [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 8,815 | 8,046 |
Operating Segments [Member] | Mortgage Banking [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 6,625 | 1,840 |
Segment Reconciling Items [Member] | Contract Land Deposit Reserve Adjustment [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | 903 | 1,983 |
Segment Reconciling Items [Member] | Equity-Based Compensation Expense [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | -13,399 | -10,703 |
Segment Reconciling Items [Member] | Corporate Capital Allocation [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | 36,945 | 28,966 |
Segment Reconciling Items [Member] | Unallocated Corporate Overhead [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | -29,984 | -25,960 |
Segment Reconciling Items [Member] | Corporate Interest Expense [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Segment reporting reconciling amount for operating profit | -5,803 | -5,675 |
Consolidation adjustments and other [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | 649 | 4,141 |
Reconciling Items Sub-Total [Member] | | |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] | | |
Consolidated profit before taxes | ($10,689) | ($7,248) |