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Basis of presentation, merger agreement and accounting policies - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total revenues	$ 650,791	$ 806,827	$ 2,005,885	$ 2,231,442
Distribution
Disaggregation of Revenue [Line Items]
Total revenues	358,451	361,585	1,107,584	1,113,292
Advertising & Marketing Services
Disaggregation of Revenue [Line Items]
Total revenues	273,378	309,661	847,631	904,299
Political
Disaggregation of Revenue [Line Items]
Total revenues	9,881	126,318	21,689	185,789
Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 9,081	$ 9,263	$ 28,981	$ 28,062

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