Investments and other assets - Narrative (Details) - USD ($)		3 Months Ended		12 Months Ended
	Jan. 25, 2024	Mar. 31, 2024	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Other non-operating items, net				$ 130,450,000	$ 16,613,000	$ 10,036,000
Capitalization of fees paid to lenders	$ 6,400,000
Reclassification of fees under previous credit facility agreement	$ 1,100,000
Investment One
Debt Securities, Available-for-Sale [Line Items]
Equity investments, impairment loss						$ 2,500,000
MadHive Inc
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sale of equity method investment			$ 26,400,000
After-tax gain on sale of equity method investment			$ 25,800,000		$ 25,800,000
Equity method investment, ownership percentage			19.00%
Broadcast Music Inc
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sale of equity method investment		$ 152,900,000
After-tax gain on sale of equity method investment		$ 152,900