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Goodwill and Intangible Assets - Narrative (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) reportingUnit | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill impairment on business | $ 27,369 | $ 32,629 | $ 0
Goodwill | 1,591,474 | 1,531,455 | 1,525,000
Amortization expense | $ 156,700 | 185,700 | 156,400
Reportable segments |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill impairment on business |  | 32,629 |
Digital Media |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Number of reporting units | reportingUnit | 7 |  |
Digital Media | Reportable segments |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill impairment on business | $ 27,369 | 0 |
Goodwill | $ 1,065,989 | 996,659 | 942,934
Digital Media | Reportable segments | Digital Media Subsegment |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Number of reporting units | reportingUnit | 2 |  |
Goodwill | $ 86,900 |  |
Cybersecurity and Martech |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Number of reporting units | reportingUnit | 2 |  |
Cybersecurity and Martech | Reportable segments |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill impairment on business | $ 0 | 32,629 |
Goodwill | $ 525,485 | $ 534,796 | $ 582,066
Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted-Average Amortization Period | 1 year |  |
Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted-Average Amortization Period | 20 years |  |

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