Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) $ in Thousands	3 Months Ended
	Mar. 31, 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
Foreign currency exchange rate changes	(11,878)
Goodwill, ending balance	2,093,455
Accumulated impairment losses, ending balance	(580,139)
Goodwill, net, ending balance	1,513,316
Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1,163,991
Accumulated impairment losses, beginning balance	(331,151)
Goodwill, net, beginning balance	832,840
Foreign currency exchange rate changes	(11,878)
Goodwill, ending balance	1,152,113
Accumulated impairment losses, ending balance	(331,151)
Goodwill, net, ending balance	820,962
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
Foreign currency exchange rate changes	(11,829)
Goodwill, ending balance	586,171
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	586,171
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
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
Foreign currency exchange rate changes	(49)
Goodwill, ending balance	391,378
Accumulated impairment losses, ending balance	(219,827)
Goodwill, net, ending balance	171,551
Television Broadcasting [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	190,815
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	190,815
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
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
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
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
Foreign currency exchange rate changes	0
Goodwill, ending balance	251,216
Accumulated impairment losses, ending balance	(166,926)
Goodwill, net, ending balance	$ 84,290