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OPERATING AND REPORTING SEGMENTS - Schedule of Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Corporate and unallocated costs |  |  |  |  |  |  |  |  |  | $ (159,020) | $ (146,093) | $ (138,478)
Interest expense |  |  |  |  |  |  |  |  |  | (2,177) | (8,370) | (785)
Other income, net |  |  |  |  |  |  |  |  |  | 6,662 | 9,577 | 11,217
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  |  | 0 | (5,635) | 0
Earnings before income taxes |  | $ 195,365 | $ 135,506 | $ 115,862 | $ 86,833 | $ 110,535 | $ 92,366 | $ 67,674 | $ 32,370 | 533,566 | 302,945 | 283,254
Operating Segments [Member] | Homebuilding |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  | 557,091 | 330,406 | 287,299
Operating Segments [Member] | Financial Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  | 16,388 | 20,579 | 24,044
Operating Segments [Member] | Reportable Subsegments [Member] | Homebuilding | West [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  | 213,918 | 141,435 | 134,852
Operating Segments [Member] | Reportable Subsegments [Member] | Homebuilding | Central [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  | 185,202 | 101,686 | 92,925
Operating Segments [Member] | Reportable Subsegments [Member] | Homebuilding | East [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  | 157,971 | 87,285 | 59,522
Corporate and Unallocated [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Corporate and unallocated costs | [1] |  |  |  |  |  |  |  |  | (44,398) | (43,612) | (38,521)
Segment Reconciling Items [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding segment operating income: |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | (2,177) | (8,370) | (785)
Other income, net | [2] |  |  |  |  |  |  |  |  | 6,662 | 9,577 | 11,217
Real Estate [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding revenue: |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ 1,409,937 | $ 1,138,091 | $ 1,033,079 | $ 901,013 | $ 1,136,848 | $ 940,880 | $ 864,610 | $ 708,145 | 4,482,120 | 3,650,483 | 3,513,419
Real Estate [Member] | Operating Segments [Member] | Homebuilding |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding revenue: |  |  |  |  |  |  |  |  |  |  |  |
Revenue | [3] |  |  |  |  |  |  |  |  | 4,482,120 | 3,650,483 | 3,513,419
Real Estate [Member] | Operating Segments [Member] | Reportable Subsegments [Member] | Homebuilding | West [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding revenue: |  |  |  |  |  |  |  |  |  |  |  |
Revenue | [3] |  |  |  |  |  |  |  |  | 1,800,223 | 1,422,516 | 1,436,334
Real Estate [Member] | Operating Segments [Member] | Reportable Subsegments [Member] | Homebuilding | Central [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding revenue: |  |  |  |  |  |  |  |  |  |  |  |
Revenue | [3] |  |  |  |  |  |  |  |  | 1,282,339 | 1,038,052 | 1,013,878
Real Estate [Member] | Operating Segments [Member] | Reportable Subsegments [Member] | Homebuilding | East [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding revenue: |  |  |  |  |  |  |  |  |  |  |  |
Revenue | [3] |  |  |  |  |  |  |  |  | $ 1,399,558 | $ 1,189,915 | $ 1,063,207
[1] | Balance consists primarily of corporate costs and numerous shared service functions such as finance and treasury that are not allocated to the homebuilding or financial reporting segments.
[2] | For the year ended December 31, 2018, Other income, net includes a favorable $4.8 million legal settlement from long-standing litigation related to a previous joint venture in Nevada.
[3] | Homebuilding revenue includes the following land closing revenue, by segment:
|  | Years Ended December 31,
Land closing revenue: |  | 2020 |  | 2019 |  | 2018
West |  | $ | 4,974 |  |  | $ | 12,463 |  |  | $ | 18,508 |
Central |  | 8,678 |  |  | 4,297 |  |  | 7,657 |
East |  | 4,079 |  |  | 29,094 |  |  | 12,542 |
Total |  | $ | 17,731 |  |  | $ | 45,854 |  |  | $ | 38,707 |

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