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Segment Information, Nature of Operations, and Certain Concentrations - Revenues (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated revenues |  |  |  |  |  |  |  |  | $ 5,159,008 | $ 4,444,568 | $ 4,211,267
Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 1,528,084 | $ 1,374,467 | $ 1,221,111 | $ 941,538 | $ 1,306,632 | $ 1,185,160 | $ 1,084,080 | $ 799,187 | 5,065,200 | 4,375,059 | 4,134,481
Homebuilding [Member] | Mid Atlantic [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 3,022,789 | 2,617,108 | 2,439,387
Homebuilding [Member] | North East [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 432,145 | 376,862 | 332,681
Homebuilding [Member] | Mid East [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,014,920 | 892,513 | 908,198
Homebuilding [Member] | South East [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 595,346 | 488,576 | 454,215
Mortgage Banking [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Mortgage Banking | $ 27,191 | $ 27,884 | $ 22,522 | $ 16,211 | $ 21,406 | $ 18,006 | $ 17,974 | $ 12,123 | $ 93,808 | $ 69,509 | $ 76,786

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- Definition The noninterest income derived from mortgage banking activities (fees and commissions), excluding fees earned from servicing third-party assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13 (d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Revenue related to the sale of homes and home building activities including design, development, general contracting, and renovation services for residential buildings, including single-family houses, multifamily housing, townhouses, apartments, and modular housing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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