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Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
USD ($)
Goodwill [Roll Forward]  
Goodwill, beginning balance $ 2,087,677
Accumulated impairment losses, beginning balance (587,641)
Goodwill, net, beginning balance 1,500,036
Acquisitions 42,777
Dispositions (1,204)
Foreign currency exchange rate changes 30,359
Goodwill, ending balance 2,159,609
Accumulated impairment losses, ending balance (587,641)
Goodwill, net, ending balance 1,571,968
Education [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 1,146,335
Accumulated impairment losses, beginning balance (331,151)
Goodwill, net, beginning balance 815,184
Acquisitions 1,262
Dispositions (1,204)
Foreign currency exchange rate changes 30,359
Goodwill, ending balance 1,176,752
Accumulated impairment losses, ending balance (331,151)
Goodwill, net, ending balance 845,601
Education [Member] | Kaplan International [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 580,495
Accumulated impairment losses, beginning balance 0
Goodwill, net, beginning balance 580,495
Acquisitions 0
Dispositions (1,204)
Foreign currency exchange rate changes 30,302
Goodwill, ending balance 609,593
Accumulated impairment losses, ending balance 0
Goodwill, net, ending balance 609,593
Education [Member] | Higher Education [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 174,564
Accumulated impairment losses, beginning balance (111,324)
Goodwill, net, beginning balance 63,240
Acquisitions 0
Dispositions 0
Foreign currency exchange rate changes 0
Goodwill, ending balance 174,564
Accumulated impairment losses, ending balance (111,324)
Goodwill, net, ending balance 63,240
Education [Member] | Supplemental Education [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 391,276
Accumulated impairment losses, beginning balance (219,827)
Goodwill, net, beginning balance 171,449
Acquisitions 1,262
Dispositions 0
Foreign currency exchange rate changes 57
Goodwill, ending balance 392,595
Accumulated impairment losses, ending balance (219,827)
Goodwill, net, ending balance 172,768
Television Broadcasting [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 190,815
Accumulated impairment losses, beginning balance 0
Goodwill, net, beginning balance 190,815
Acquisitions 0
Dispositions 0
Foreign currency exchange rate changes 0
Goodwill, ending balance 190,815
Accumulated impairment losses, ending balance 0
Goodwill, net, ending balance 190,815
Manufacturing [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 234,993
Accumulated impairment losses, beginning balance (82,062)
Goodwill, net, beginning balance 152,931
Acquisitions 41,515
Dispositions 0
Foreign currency exchange rate changes 0
Goodwill, ending balance 276,508
Accumulated impairment losses, ending balance (82,062)
Goodwill, net, ending balance 194,446
Healthcare [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 135,038
Accumulated impairment losses, beginning balance 0
Goodwill, net, beginning balance 135,038
Acquisitions 0
Dispositions 0
Foreign currency exchange rate changes 0
Goodwill, ending balance 135,038
Accumulated impairment losses, ending balance 0
Goodwill, net, ending balance 135,038
Automotive [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 129,280
Accumulated impairment losses, beginning balance 0
Goodwill, net, beginning balance 129,280
Acquisitions 0
Dispositions 0
Foreign currency exchange rate changes 0
Goodwill, ending balance 129,280
Accumulated impairment losses, ending balance 0
Goodwill, net, ending balance 129,280
Other Businesses [Member]  
Goodwill [Roll Forward]  
Goodwill, beginning balance 251,216
Accumulated impairment losses, beginning balance (174,428)
Goodwill, net, beginning balance 76,788
Acquisitions 0
Dispositions 0
Foreign currency exchange rate changes 0
Goodwill, ending balance 251,216
Accumulated impairment losses, ending balance (174,428)
Goodwill, net, ending balance $ 76,788