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Telford Acquisition - Additional Information (Detail) £ / shares in Units, $ in Thousands, £ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 01, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Oct. 01, 2019 GBP (£) £ / shares
Business Acquisition [Line Items] |  |  |  |  |
Revenue |  | $ 23,894,091 | $ 21,340,088 | $ 18,628,787 |
Operating income |  | 1,259,875 | 1,087,989 | 1,078,682 |
Operational net income |  | 1,361,345 | 1,379,006 | 1,171,333 |
Direct transaction and integration costs |  | 15,292 | 9,124 | $ 27,351 |
Telford Homes Plc [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Date of business purchase agreement | Oct. 01, 2019 |  |  |  |
Share price | £ / shares |  |  |  |  | £ 3.50
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 |  |  |
Amortization expense |  | 400 |  |  |
Increased amortization expense |  | 1,000 | 1,500 |  |
Increased interest expense |  |  | $ 4,100 |  |
Removal of direct costs |  | $ 15,000 |  |  |

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