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Inventory And Land Held For Sale (Narrative) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
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Jun. 30, 2017 USD ($) inactive_community inacitve_lot | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Inventory Disclosure [Abstract] |  |  |  |
Number of communities | inactive_community | 17 |  |  |
Number of lots | inacitve_lot | 4,600 |  |  |
Net Realizable Value Adjustments Land Held For Sale Total - land held for sale | $ (81,000) | $ (11,489) | $ (83,576) | $ (1,105)
Carrying value of land parcels | 151,000 |  |  |
Inventory adjustments NRV |  |  | 2,600 |
Inventory [Line Items] |  |  |  |
Land impairments |  | $ 70,965 | 88,952 | $ 1,074
Impaired Community |  |  |  |
Inventory [Line Items] |  |  |  |
Entitlement period sought |  | 10 years |  |
Land impairments |  | $ 59,200 |  |
All Other Communities |  |  |  |
Inventory [Line Items] |  |  |  |
Land impairments |  | $ 11,800 | 4,500 |
May 2017 Strategic Review Communities [Member] |  |  |  |
Inventory [Line Items] |  |  |  |
Land impairments | $ 31,500 |  |  |
Large Project Impairment [Member] |  |  |  |
Inventory [Line Items] |  |  |  |
Land impairments |  |  | $ 53,000 |

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