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Goodwill And Other Intangible Assets (Fair Values Of Intangible Assets Acquired In Various Business Combinations By Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Acquired Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross carrying amount	$ 383,685	$ 842,268
Finite-lived intangible assets, accumulated amortization	(250,804)	(260,331)
Intangible assets, net (excluding goodwill)	132,881	581,937
Customer relationships [Member]
Schedule of Acquired Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross carrying amount	243,203	570,104
Finite-lived intangible assets, accumulated amortization	(173,720)	(174,982)
Marketing assets [Member]
Schedule of Acquired Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross carrying amount	29,876	71,308
Finite-lived intangible assets, accumulated amortization	(11,660)	(11,985)
Developed technology [Member]
Schedule of Acquired Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross carrying amount	110,606	182,956
Finite-lived intangible assets, accumulated amortization	(65,424)	(69,386)
Content [Member]
Schedule of Acquired Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross carrying amount	0	17,900
Finite-lived intangible assets, accumulated amortization	$ 0	$ (3,978)