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Goodwill and intangible assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 864,513 | $ 868,307
Accumulated amortization | 552,602 | 510,833
Net carrying amount | 311,911 | 357,474
Indefinite-lived intangible assets: |  |
Total intangible assets | 478,697 | 524,350
Goodwill | 533,687 | 533,876
Mastheads |  |
Indefinite-lived intangible assets: |  |
Non-amortized intangible assets | 166,786 | 166,876
Advertiser relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 445,841 | 446,609
Accumulated amortization | 257,536 | 236,168
Net carrying amount | 188,305 | 210,441
Other customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 100,980 | 101,819
Accumulated amortization | 61,573 | 56,601
Net carrying amount | 39,407 | 45,218
Subscriber relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 250,822 | 251,099
Accumulated amortization | 169,549 | 155,528
Net carrying amount | 81,273 | 95,571
Other intangible assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 66,870 | 68,780
Accumulated amortization | 63,944 | 62,536
Net carrying amount | $ 2,926 | $ 6,244

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