Restructuring and Other Related Charges (Summary of Accrued Restructuring and Other Related Costs) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 111,874,000
Restructuring and other related charges	$ 6,041,000	$ 0	11,974,000	$ 0
Cash payments			(88,506,000)
Other			651,000
Ending Balance	35,993,000		35,993,000
Severance and Employee-Related Costs
Restructuring Reserve [Roll Forward]
Beginning Balance			37,150,000
Restructuring and other related charges			13,775,000
Cash payments			(36,270,000)
Other			(34,000)
Ending Balance	14,621,000		14,621,000
Content Impairments and Other Exit Costs
Restructuring Reserve [Roll Forward]
Beginning Balance			74,724,000
Restructuring and other related charges			(1,801,000)
Cash payments			(52,236,000)
Other			685,000
Ending Balance	$ 21,372,000		$ 21,372,000