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Segment Information, Nature of Operations, and Certain Concentrations - Segment Reporting, Other Significant Reconciling Items (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Interest Income: |  |  |
Interest income | $ 4,504 | $ 5,702 | $ 5,411
Other unallocated interest income | 1,388 | 3,202 | 5,301
Consolidated interest income | 5,892 | 8,904 | 10,712
Interest Expense: |  |  |
Consolidated interest expense | 7,529 | 1,892 | 6,029
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 8,100 | 6,672 | 7,263
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | 12,365 | 11,444 | 6,943
Corporate capital allocation | 91,507 | 71,226 | 65,971
Mortgage Banking [Member] |  |  |
Interest Income: |  |  |
Interest income | 4,504 | 5,702 | 5,411
Interest Expense: |  |  |
Consolidated interest expense | 546 | 875 | 1,126
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 397 | 295 | 362
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | 1,169 | 1,049 | 883
Homebuilding Mid Atlantic [Member] |  |  |
Interest Expense: |  |  |
Consolidated interest expense | 59,310 | 48,971 | 45,082
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 3,886 | 3,353 | 3,369
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | 3,595 | 3,784 | 2,165
Corporate capital allocation | 59,144 | 48,697 | 44,758
Homebuilding North East [Member] |  |  |
Interest Expense: |  |  |
Consolidated interest expense | 8,196 | 5,776 | 5,936
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 631 | 409 | 515
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | 1,703 | 424 | 440
Corporate capital allocation | 8,187 | 5,763 | 5,926
Homebuilding Mid East [Member] |  |  |
Interest Expense: |  |  |
Consolidated interest expense | 15,043 | 11,080 | 9,669
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 1,473 | 1,398 | 1,224
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | 1,886 | 5,611 | 2,247
Corporate capital allocation | 15,039 | 11,074 | 9,657
Homebuilding South East [Member] |  |  |
Interest Expense: |  |  |
Consolidated interest expense | 9,145 | 5,701 | 5,641
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 808 | 729 | 758
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | 1,260 | 369 | 583
Corporate capital allocation | 9,137 | 5,692 | 5,630
Reportable Segment [Member] |  |  |
Interest Expense: |  |  |
Consolidated interest expense | 92,240 | 72,403 | 67,454
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 7,195 | 6,184 | 6,228
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | 9,613 | 11,237 | 6,318
Corporate capital allocation [Member] |  |  |
Interest Expense: |  |  |
Consolidated other interest expense | 91,507 | 71,226 | 65,971
Senior Notes And Other Interest [Member] |  |  |
Interest Expense: |  |  |
Consolidated other interest expense | 6,796 | 715 | 4,546
Unallocated corporate overhead [Member] |  |  |
Depreciation and Amortization: |  |  |
Consolidated depreciation and amortization | 905 | 488 | 1,035
Expenditures for Property and Equipment: |  |  |
Consolidated expenditures for property and equipment | $ 2,752 | $ 207 | $ 625

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- Definition Total expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment; if the amount: (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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