Restructuring and Other Related Charges (Summary of Accrued Restructuring and Other Related Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Accrued restructuring costs, beginning balance	$ 111,874	$ 340
Restructuring and other related charges	27,787	448,966	$ 10,378
Cash payments	(112,550)	(324)
Non-cash adjustments	(15,147)	(336,744)
Other	1,770	(364)
Accrued restructuring costs, ending balance	13,734	111,874	340
Severance and Employee-Related Costs
Restructuring Reserve [Roll Forward]
Accrued restructuring costs, beginning balance	37,150	311
Restructuring and other related charges	17,510	45,212
Cash payments	(45,878)	(311)
Non-cash adjustments	0	(7,698)
Other	(56)	(364)
Accrued restructuring costs, ending balance	8,726	37,150	311
Content Impairments and Other Exit Costs
Restructuring Reserve [Roll Forward]
Accrued restructuring costs, beginning balance	74,724	29
Restructuring and other related charges	10,277	403,754
Cash payments	(66,672)	(13)
Non-cash adjustments	(15,147)	(329,046)
Other	1,826	0
Accrued restructuring costs, ending balance	$ 5,008	$ 74,724	$ 29