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Segment Information Revenues By Region (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Revenues from External Customers [Line Items] |  |  |  |
Revenues | $ 509,594 | $ 635,037 | $ 1,108,009 | $ 1,249,613
United States and Canada [Member] |  |  |  |
Revenues from External Customers [Line Items] |  |  |  |
Revenues | 369,862 | 417,909 | 755,187 | 815,475
Europe, Middle East, and Africa [Member] |  |  |  |
Revenues from External Customers [Line Items] |  |  |  |
Revenues | 107,799 | 167,314 | 274,783 | 338,556
Other [Member] |  |  |  |
Revenues from External Customers [Line Items] |  |  |  |
Revenues | $ 31,933 | $ 49,814 | $ 78,039 | $ 95,582

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