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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, 2022
Dec. 31, 2021
Schedule of Acquired Intangible Assets by Major Class [Line Items]    
Finite-lived intangible assets, gross carrying amount $ 839,015 $ 910,592
Finite-lived intangible assets, accumulated amortization (203,879) (212,540)
Intangible assets, net (excluding goodwill) 635,136 698,052
Customer relationships [Member]    
Schedule of Acquired Intangible Assets by Major Class [Line Items]    
Finite-lived intangible assets, gross carrying amount 569,009 606,409
Finite-lived intangible assets, accumulated amortization (146,948) (151,258)
Marketing assets [Member]    
Schedule of Acquired Intangible Assets by Major Class [Line Items]    
Finite-lived intangible assets, gross carrying amount 69,643 74,731
Finite-lived intangible assets, accumulated amortization (8,371) (7,269)
Developed technology [Member]    
Schedule of Acquired Intangible Assets by Major Class [Line Items]    
Finite-lived intangible assets, gross carrying amount 182,463 211,552
Finite-lived intangible assets, accumulated amortization (46,571) (54,013)
Content [Member]    
Schedule of Acquired Intangible Assets by Major Class [Line Items]    
Finite-lived intangible assets, gross carrying amount 17,900 17,900
Finite-lived intangible assets, accumulated amortization $ (1,989) $ 0