SEGMENT INFORMATION Table 2 - Revenues by Geographic Area (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Revenues By Geographic Areas | |||||||||||
| Revenues | $ 450,535 | $ 440,566 | $ 435,488 | $ 487,430 | $ 471,757 | $ 441,418 | $ 437,804 | $ 405,703 | $ 1,814,019 | $ 1,756,682 | $ 2,084,040 |
| United States | |||||||||||
| Revenues By Geographic Areas | |||||||||||
| Revenues | 1,406,626 | 1,352,936 | 1,599,088 | ||||||||
| Netherlands | |||||||||||
| Revenues By Geographic Areas | |||||||||||
| Revenues | 322,251 | 313,395 | 386,282 | ||||||||
| Other | |||||||||||
| Revenues By Geographic Areas | |||||||||||
| Revenues | $ 85,142 | $ 90,351 | $ 98,670 | ||||||||