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Quarterly Results (Unaudited) (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
land inventory impairment | $ 57,500 |  | $ 31,500 |  |  |  |  |
Net realizable value adjustments (NRV) - land held for sale |  |  | 81,000 |  |  | $ 83,576 | $ 1,105 | $ (901)
Litigation Settlement, Expense |  |  |  |  |  |  | 15,000 | 20,000
Impairment Losses Related to Real Estate Partnerships |  |  | 8,000 |  |  | $ 8,017 | 0 | 0
Write-off of insurance receivables | -9297 | -5326 |  | -15000 |  | 29624 |  |
Gain (Loss) Related to Litigation Settlement |  |  | $ 19,800 |  |  |  |  |
Loss on debt retirements |  |  |  |  |  | $ 0 | 657 | 0
Adjustment to self insurance reserves | $ 75,300 |  |  |  | $ 55,200 | (95,100) | (55,200) | (62,200)
Reserves provided |  |  |  |  |  | (50) | 506 | (11,433)
Home Office Relocation [Member] |  |  |  |  |  |  |  |
Costs associated with the relocation of corporate headquarters |  |  |  |  |  |  | $ 8,300 | $ 4,400
Florida [Member] |  |  |  |  |  |  |  |
Product Warranty Expense |  |  |  |  |  | $ 12,400 |  |

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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