Breakdown of Revenue and Non-Current Assets by Geographical Areas - Revenue by Significant Other Countries (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 and Long-Lived Assets [Line Items] | ||||
Revenue | $ 528,869 | $ 563,973 | $ 1,630,218 | $ 1,622,661 |
United States | ||||
Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
Revenue | 186,366 | 198,342 | 559,786 | 578,806 |
Germany | ||||
Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
Revenue | 47,460 | 48,318 | 150,607 | 132,814 |
United Kingdom | ||||
Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
Revenue | 22,109 | 28,352 | 70,887 | 82,971 |
Japan | ||||
Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
Revenue | $ 83,792 | $ 94,103 | $ 260,116 | $ 266,813 |