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Segment Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) Segment Divisions | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | Segment |  |  | 2 |  |
Number of internal divisions | Divisions |  |  | 2 |  |
Revenues | $ 2,200,374 | $ 1,792,430 | $ 4,378,544 | $ 3,506,167 |
Property and equipment | 1,190,333 |  | 1,190,333 |  | $ 1,174,094
Foreign Operations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 524,500 | $ 335,600 | 1,180,000 | $ 688,000 |
Property and equipment | $ 331,600 |  | $ 331,600 |  | $ 320,700
Foreign Operations | Canada |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of foreign revenues | 80.00% | 78.00% | 82.00% | 73.00% |

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