Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,105,333
Accumulated impairment losses, beginning balance	(580,139)
Goodwill, net, beginning balance	1,525,194
Acquisitions	4,204
Impairment	(7,502)
Dispositions	(1,684)
Foreign currency exchange rate changes	14,296
Goodwill, ending balance	2,122,149
Accumulated impairment losses, ending balance	(587,641)
Goodwill, net, ending balance	1,534,508
Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1,163,991
Accumulated impairment losses, beginning balance	(331,151)
Goodwill, net, beginning balance	832,840
Acquisitions	4,204
Impairment	0
Dispositions	(1,684)
Foreign currency exchange rate changes	14,296
Goodwill, ending balance	1,180,807
Accumulated impairment losses, ending balance	(331,151)
Goodwill, net, ending balance	849,656
Education [Member] | Kaplan International [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	598,000
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	598,000
Acquisitions	4,204
Dispositions	(1,684)
Foreign currency exchange rate changes	14,337
Goodwill, ending balance	614,857
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	614,857
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	391,427
Accumulated impairment losses, beginning balance	(219,827)
Goodwill, net, beginning balance	171,600
Acquisitions	0
Dispositions	0
Foreign currency exchange rate changes	(41)
Goodwill, ending balance	391,386
Accumulated impairment losses, ending balance	(219,827)
Goodwill, net, ending balance	171,559
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
Impairment	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	0
Impairment	0
Dispositions
Foreign currency exchange rate changes	0
Goodwill, ending balance	234,993
Accumulated impairment losses, ending balance	(82,062)
Goodwill, net, ending balance	152,931
Healthcare [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	135,038
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	135,038
Acquisitions	0
Impairment	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
Impairment	0
Dispositions
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	(166,926)
Goodwill, net, beginning balance	84,290
Acquisitions	0
Impairment	(7,502)
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