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Segment Information Revenues By Region (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Revenues from External Customers [Line Items] |  |  |  |  |
Revenues |  | $ 595,962 | $ 486,747 | $ 1,789,073 | $ 1,467,421
United States and Canada [Member] |  |  |  |  |
Revenues from External Customers [Line Items] |  |  |  |  |
Revenues |  | 376,676 | 259,796 | 1,080,709 | 824,630
Europe, Middle East, and Africa [Member] |  |  |  |  |
Revenues from External Customers [Line Items] |  |  |  |  |
Revenues |  | 177,356 | 171,924 | 564,178 | 493,505
Other [Member] |  |  |  |  |
Revenues from External Customers [Line Items] |  |  |  |  |
Revenues | [1] | $ 41,930 | $ 55,027 | $ 144,186 | $ 149,286
[1] | The Other region includes our operations in Latin America and Asia Pacific.

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