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Segment Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) Segment division | Sep. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | Segment |  |  | 2 |  |
Number of internal divisions | division |  |  | 2 |  |
Revenues | $ 3,352,895 | $ 2,985,281 | $ 8,999,353 | $ 8,059,205 |
Property and equipment | 1,390,209 |  | 1,390,209 |  | $ 1,276,032
Canada |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 342,016 | 522,618 | 1,029,667 | 1,376,149 |
Foreign Operations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 480,000 | $ 667,600 | 1,360,000 | $ 1,840,000 |
Property and equipment | $ 310,000 |  | $ 310,000 |  | $ 304,000
Foreign Operations | Canada |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of foreign revenues | 71.00% | 78.00% | 75.00% | 75.00% |

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