Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) $ in Thousands	3 Months Ended
	Mar. 31, 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
Reclassification to assets held for sale	(1,070)
Foreign currency exchange rate changes	10,433
Goodwill, ending balance	2,097,040
Accumulated impairment losses, ending balance	(587,641)
Goodwill, net, ending balance	1,509,399
Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1,146,335
Accumulated impairment losses, beginning balance	(331,151)
Goodwill, net, beginning balance	815,184
Reclassification to assets held for sale	(1,070)
Foreign currency exchange rate changes	10,433
Goodwill, ending balance	1,155,698
Accumulated impairment losses, ending balance	(331,151)
Goodwill, net, ending balance	824,547
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
Reclassification to assets held for sale	(1,070)
Foreign currency exchange rate changes	10,424
Goodwill, ending balance	589,849
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	589,849
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
Reclassification to assets held for sale	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
Reclassification to assets held for sale	0
Foreign currency exchange rate changes	9
Goodwill, ending balance	391,285
Accumulated impairment losses, ending balance	(219,827)
Goodwill, net, ending balance	171,458
Television Broadcasting [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	190,815
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	190,815
Reclassification to assets held for sale	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
Reclassification to assets held for sale	0
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
Reclassification to assets held for sale	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
Reclassification to assets held for sale	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
Reclassification to assets held for sale	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