Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,031,034
Accumulated impairment losses, beginning balance	(445,368)
Goodwill, net, beginning balance	1,585,666
Acquisitions	17,996
Impairment	(976)
Foreign currency exchange rate changes	(3,197)
Goodwill, ending balance	2,045,833
Accumulated impairment losses, ending balance	(446,344)
Goodwill, net, ending balance	1,599,489
Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1,181,284
Accumulated impairment losses, beginning balance	(331,151)
Goodwill, net, beginning balance	850,133
Acquisitions	0
Impairment	(976)
Foreign currency exchange rate changes	(3,197)
Goodwill, ending balance	1,178,087
Accumulated impairment losses, ending balance	(332,127)
Goodwill, net, ending balance	845,960
Education [Member] | Kaplan International [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	614,096
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	614,096
Acquisitions	0
Impairment	(976)
Foreign currency exchange rate changes	(3,168)
Goodwill, ending balance	610,928
Accumulated impairment losses, ending balance	(976)
Goodwill, net, ending balance	609,952
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
Impairment	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	392,624
Accumulated impairment losses, beginning balance	(219,827)
Goodwill, net, beginning balance	172,797
Acquisitions	0
Impairment	0
Foreign currency exchange rate changes	(29)
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
Impairment	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	190,815
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	190,815
Healthcare [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	136,637
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	136,637
Acquisitions	17,996
Impairment	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	154,633
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	154,633
Healthcare [Member] | CSI [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	87,140
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	87,140
Acquisitions	0
Impairment	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	87,140
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	87,140
Healthcare [Member] | Other Healthcare [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	49,497
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	49,497
Acquisitions	17,996
Impairment	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	67,493
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	67,493
Manufacturing [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	272,523
Accumulated impairment losses, beginning balance	(82,062)
Goodwill, net, beginning balance	190,461
Acquisitions	0
Impairment	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	272,523
Accumulated impairment losses, ending balance	(82,062)
Goodwill, net, ending balance	190,461
Automotive [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	140,832
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	140,832
Acquisitions	0
Impairment	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	140,832
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	140,832
Other Businesses [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	108,943
Accumulated impairment losses, beginning balance	(32,155)
Goodwill, net, beginning balance	76,788
Acquisitions	0
Impairment	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	108,943
Accumulated impairment losses, ending balance	(32,155)
Goodwill, net, ending balance	$ 76,788