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

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

TEGNA INC 10-Q