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Revenues (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 398,185 | $ 332,393
Point in time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 5,965 | 6,497
Over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 392,220 | 325,896
Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 398,185 | 332,392
Operating Segments | Digital Media |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 226,874 | 162,691
Operating Segments | Digital Media | Advertising |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 174,124 | 115,265
Operating Segments | Digital Media | Subscription |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 50,881 | 45,428
Operating Segments | Digital Media | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,869 | 1,998
Operating Segments | Cloud Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 171,429 | 169,784
Operating Segments | Cloud Services | Subscription |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 171,337 | 169,748
Operating Segments | Cloud Services | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 92 | 36
Corporate |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 1
Elimination of inter-segment |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ (118) | $ (83)

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