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Telford Acquisition - Narrative (Details) £ / shares in Units, $ in Thousands, £ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Oct. 01, 2019 USD ($) | Oct. 01, 2019 GBP (£) £ / shares
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 6,910,501 | $ 5,645,142 | $ 5,381,384 | $ 5,889,168 | $ 7,119,407 | $ 5,925,101 | $ 5,714,073 | $ 5,135,510 | $ 23,826,195 | $ 23,894,091 | $ 21,340,088 |  |
Operating income | $ 443,896 | $ 211,408 | $ 94,165 | $ 220,290 | $ 513,841 | $ 316,630 | $ 284,417 | $ 144,987 | 969,759 | 1,259,875 | 1,087,989 |  |
Operational net income |  |  |  |  |  |  |  |  | 969,969 | 1,361,345 | 1,379,006 |  |
Direct transaction and integration costs |  |  |  |  |  |  |  |  | $ 1,756 | 15,292 | 9,124 |  |
Telford Homes |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Share price | £ / shares |  |  |  |  |  |  |  |  |  |  |  |  | £ 3,500
Business combination, cash consideration |  |  |  |  |  |  |  |  |  |  |  | $ 328,500 | £ 267.1
Revenue |  |  |  |  |  |  |  |  |  | 97,500 |  |  |
Operating income |  |  |  |  |  |  |  |  |  | 1,000 |  |  |
Operational net income |  |  |  |  |  |  |  |  |  | 1,400 |  |  |
Direct transaction and integration costs |  |  |  |  |  |  |  |  |  | 15,000 |  |  |
Increased amortization expense |  |  |  |  |  |  |  |  |  | 1,000 | 1,500 |  |
Increased interest expense |  |  |  |  |  |  |  |  |  |  | $ 4,100 |  |
Removal of direct costs |  |  |  |  |  |  |  |  |  | 15,000 |  |  |
Telford Homes | Trademark |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  |  |  |  |  | $ 400 |  |  |

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