Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,029,598
Accumulated impairment losses, beginning balance	(380,016)
Goodwill, net, beginning balance	1,649,582
Measurement period adjustments	(853)
Acquisitions	56,902
Foreign currency exchange rate changes	(74,191)
Goodwill, ending balance	2,011,456
Accumulated impairment losses, ending balance	(380,016)
Goodwill, net, ending balance	1,631,440
Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1,186,236
Accumulated impairment losses, beginning balance	(331,151)
Goodwill, net, beginning balance	855,085
Measurement period adjustments	1,081
Acquisitions	0
Foreign currency exchange rate changes	(74,191)
Goodwill, ending balance	1,113,126
Accumulated impairment losses, ending balance	(331,151)
Goodwill, net, ending balance	781,975
Education [Member] | Kaplan International [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	621,268
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	621,268
Measurement period adjustments	0
Foreign currency exchange rate changes	(74,068)
Goodwill, ending balance	547,200
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	547,200
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
Measurement period adjustments	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	390,404
Accumulated impairment losses, beginning balance	(219,827)
Goodwill, net, beginning balance	170,577
Measurement period adjustments	1,081
Foreign currency exchange rate changes	(123)
Goodwill, ending balance	391,362
Accumulated impairment losses, ending balance	(219,827)
Goodwill, net, ending balance	171,535
Television Broadcasting [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	190,815
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	190,815
Measurement period adjustments	0
Acquisitions	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	(34,302)
Goodwill, net, beginning balance	200,691
Measurement period adjustments	0
Acquisitions	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	234,993
Accumulated impairment losses, ending balance	(34,302)
Goodwill, net, ending balance	200,691
Healthcare [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	118,329
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	118,329
Measurement period adjustments	249
Acquisitions	18,031
Foreign currency exchange rate changes	0
Goodwill, ending balance	136,609
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	136,609
Automotive [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	45,826
Accumulated impairment losses, beginning balance	0
Goodwill, net, beginning balance	45,826
Measurement period adjustments	0
Acquisitions	38,871
Foreign currency exchange rate changes	0
Goodwill, ending balance	84,697
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	84,697
Other Businesses [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	253,399
Accumulated impairment losses, beginning balance	(14,563)
Goodwill, net, beginning balance	238,836
Measurement period adjustments	(2,183)
Acquisitions	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	251,216
Accumulated impairment losses, ending balance	(14,563)
Goodwill, net, ending balance	$ 236,653