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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue Recognition [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following table presents our revenues disaggregated by geography, based on the billing addresses of our customers:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (In thousands)
U.S. | $ | 193,392 |  |  | $ | 190,980 |  |  | $ | 577,395 |  |  | $ | 563,981 |
EMEA | 51,480 |  |  | 53,047 |  |  | 155,221 |  |  | 159,831 |
China | 30,647 |  |  | 27,094 |  |  | 88,337 |  |  | 79,502 |
Other | 32,902 |  |  | 34,656 |  |  | 100,165 |  |  | 104,203 |
Total revenues | $ | 308,421 |  |  | $ | 305,777 |  |  | $ | 921,118 |  |  | $ | 907,517 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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