Segment Information - Reconciliation of segment adjusted operating income (loss) to net income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of segment adjusted operating income (loss) to net income (loss) from continuing operations before income taxes:
Net income (loss)	$ 49,904	$ (307,218)	$ (543,690)
Income (loss) from discontinued operations, net of tax			(20)
Income (loss) from continuing operations, net of tax	49,904	(307,218)	(543,710)
Income tax expense (benefit)	79,220	61,536	55,621
Income (loss) before income taxes	129,124	(245,682)	(488,089)
Investment (income) loss	(43,820)	(14,992)	(1,557)
Interest expense	185,285	177,895	171,476
(Gain)/loss on debt buybacks and exchanges	25,274	4,597	13,423
Impairments and other charges			66,731
Other, net	(726)	127,099	39,998
Total segment adjusted operating income (loss)	433,707	194,401	(80,787)
Operating segments
Reconciliation of segment adjusted operating income (loss) to net income (loss) from continuing operations before income taxes:
Net income (loss)	49,904	(307,218)	(543,690)
Income tax expense (benefit)	79,220	61,536	55,621
Income (loss) before income taxes	129,124	(245,682)	(488,089)
Investment (income) loss	(43,820)	(14,992)	(1,557)
Interest expense	185,285	177,895	171,476
Impairments and other charges			(66,731)
Other, net	(726)	127,099	39,998
Total segment adjusted operating income (loss)	433,707	194,401	(80,787)
Other reconciling items
Reconciliation of segment adjusted operating income (loss) to net income (loss) from continuing operations before income taxes:
Other reconciling items	$ 163,844	$ 150,081	$ 130,654