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Segment Information (Land-Related Charges By Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information |  |  |
Total land-related charges | $ 191,912 | $ 19,336 | $ 11,467
Northeast [Member] |  |  |
Segment Reporting Information |  |  |
Total land-related charges | 51,362 | 2,079 | 3,301
Southeast [Member] |  |  |
Segment Reporting Information |  |  |
Total land-related charges | 55,689 | 3,089 | 3,022
Florida [Member] |  |  |
Segment Reporting Information |  |  |
Total land-related charges | 9,702 | 715 | 4,555
Texas [Member] |  |  |
Segment Reporting Information |  |  |
Total land-related charges | 2,521 | 515 | 295
Midwest [Member] |  |  |
Segment Reporting Information |  |  |
Total land-related charges | 8,917 | 3,383 | 2,319
West [Member] |  |  |
Segment Reporting Information |  |  |
Total land-related charges | 56,995 | 8,960 | (2,615)
Other Homebuilding [Member] |  |  |
Segment Reporting Information |  |  |
Total land-related charges | $ 6,726 | $ 595 | $ 590

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- Details
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- Details
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