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v3.23.3

Business acquisitions - Narrative (Details) |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 28, 2023 USD ($) | Aug. 01, 2022 USD ($) entity | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | $ 518,655,000 |  | $ 518,655,000 |  | $ 515,140,000
Revenue |  |  | 469,193,000 | $ 446,921,000 | 1,383,143,000 | $ 1,452,578,000 |
Iponweb |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Revenue |  |  | 33,618,000 | $ 18,463,000 | 87,776,000 | $ 18,463,000 |
Iponweb |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  | 100.00% |  |  |  |  |
Number of legal entities acquired | entity |  | 9 |  |  |  |  |
Business combination, consideration transferred |  | $ 290,200,000 |  |  |  |  |
Business combination, contingent consideration, liability |  | 61,200,000 |  |  |  |  |
Business acquisition, equity interest issued or issuable, value assigned |  | $ 70,200,000 |  |  |  |  |
Lock-up period |  | 3 years |  |  |  |  |
Goodwill |  |  | $ 187,600,000 |  | 187,600,000 |  |
Transaction costs during the period |  |  |  |  | 0 |  | 12,600,000
Earnings or loss of acquiree since acquisition date |  |  |  |  | $ 9,100,000 |  |
Iponweb | Maximum |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination, contingent consideration, liability |  | $ 100,000,000 |  |  |  |  | $ 100,000,000
Brandcrush |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination, consideration transferred | $ 7,100,000 |  |  |  |  |  |
Goodwill | 5,000,000 |  |  |  |  |  |
Acquisition costs | 700,000 |  |  |  |  |  |
Brandcrush | Technology-based intangible assets |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets | $ 3,500,000 |  |  |  |  |  |

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