Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) $ in Thousands	6 Months Ended
	Jun. 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	(933)
Acquisitions	5,971
Foreign currency exchange rate changes	(36,972)
Goodwill, ending balance	1,997,664
Accumulated impairment losses, ending balance	(380,016)
Goodwill, net, ending balance	1,617,648
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	1,000
Acquisitions	0
Foreign currency exchange rate changes	(36,972)
Goodwill, ending balance	1,150,264
Accumulated impairment losses, ending balance	(331,151)
Goodwill, net, ending balance	819,113
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	(36,962)
Goodwill, ending balance	584,306
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	584,306
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	1,000
Foreign currency exchange rate changes	(10)
Goodwill, ending balance	391,394
Accumulated impairment losses, ending balance	(219,827)
Goodwill, net, ending balance	171,567
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	250
Acquisitions	5,971
Foreign currency exchange rate changes	0
Goodwill, ending balance	124,550
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	124,550
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	0
Foreign currency exchange rate changes	0
Goodwill, ending balance	45,826
Accumulated impairment losses, ending balance	0
Goodwill, net, ending balance	45,826
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