Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,029,598	$ 1,838,080
Accumulated impairment losses, beginning balance	(380,016)	(353,330)
Goodwill, net, beginning balance	1,649,582	1,484,750
Measurement period adjustment	(853)
Acquisitions	56,163	205,003
Impairment	(102,124)	(26,686)
Foreign currency exchange rate changes	(41,815)	(13,485)
Goodwill, ending balance	2,043,093	2,029,598
Accumulated impairment losses, ending balance	(482,140)	(380,016)
Goodwill, net, ending balance	1,560,953	1,649,582
Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1,186,236	1,183,379
Accumulated impairment losses, beginning balance	(331,151)	(331,151)
Goodwill, net, beginning balance	855,085	852,228
Measurement period adjustment	1,081
Acquisitions	0	16,342
Impairment	0	0
Foreign currency exchange rate changes	(41,815)	(13,485)
Goodwill, ending balance	1,145,502	1,186,236
Accumulated impairment losses, ending balance	(331,151)	(331,151)
Goodwill, net, ending balance	814,351	855,085
Education [Member] | Kaplan International [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	621,268	634,749
Accumulated impairment losses, beginning balance	0	0
Goodwill, net, beginning balance	621,268	634,749
Measurement period adjustment	0
Acquisitions		0
Foreign currency exchange rate changes	(41,707)	(13,481)
Goodwill, ending balance	579,561	621,268
Accumulated impairment losses, ending balance	0	0
Goodwill, net, ending balance	579,561	621,268
Education [Member] | Higher Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	174,564	174,564
Accumulated impairment losses, beginning balance	(111,324)	(111,324)
Goodwill, net, beginning balance	63,240	63,240
Measurement period adjustment	0
Acquisitions		0
Foreign currency exchange rate changes	0	0
Goodwill, ending balance	174,564	174,564
Accumulated impairment losses, ending balance	(111,324)	(111,324)
Goodwill, net, ending balance	63,240	63,240
Education [Member] | Supplemental Education [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	390,404	374,066
Accumulated impairment losses, beginning balance	(219,827)	(219,827)
Goodwill, net, beginning balance	170,577	154,239
Measurement period adjustment	1,081
Acquisitions		16,342
Foreign currency exchange rate changes	(108)	(4)
Goodwill, ending balance	391,377	390,404
Accumulated impairment losses, ending balance	(219,827)	(219,827)
Goodwill, net, ending balance	171,550	170,577
Television Broadcasting [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	190,815	190,815
Accumulated impairment losses, beginning balance	0	0
Goodwill, net, beginning balance	190,815	190,815
Measurement period adjustment	0
Acquisitions	0	0
Impairment	0	0
Foreign currency exchange rate changes	0	0
Goodwill, ending balance	190,815	190,815
Accumulated impairment losses, ending balance	0	0
Goodwill, net, ending balance	190,815	190,815
Manufacturing [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	234,993	234,993
Accumulated impairment losses, beginning balance	(34,302)	(7,616)
Goodwill, net, beginning balance	200,691	227,377
Measurement period adjustment	0
Acquisitions	0	0
Impairment	0	(26,686)
Foreign currency exchange rate changes	0	0
Goodwill, ending balance	234,993	234,993
Accumulated impairment losses, ending balance	(34,302)	(34,302)
Goodwill, net, ending balance	200,691	200,691
Graham Healthcare Group [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	118,329	98,421
Accumulated impairment losses, beginning balance	0	0
Goodwill, net, beginning balance	118,329	98,421
Measurement period adjustment	249
Acquisitions	17,292	19,908
Impairment	0	0
Foreign currency exchange rate changes	0	0
Goodwill, ending balance	135,870	118,329
Accumulated impairment losses, ending balance	0	0
Goodwill, net, ending balance	135,870	118,329
Automotive [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	45,826	39,121
Accumulated impairment losses, beginning balance	0	0
Goodwill, net, beginning balance	45,826	39,121
Measurement period adjustment	0
Acquisitions	38,871	6,705
Impairment	0	0
Foreign currency exchange rate changes	0	0
Goodwill, ending balance	84,697	45,826
Accumulated impairment losses, ending balance	0	0
Goodwill, net, ending balance	84,697	45,826
Other Businesses [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	253,399	91,351
Accumulated impairment losses, beginning balance	(14,563)	(14,563)
Goodwill, net, beginning balance	238,836	76,788
Measurement period adjustment	(2,183)
Acquisitions	0	162,048
Impairment	(102,124)	0
Foreign currency exchange rate changes	0	0
Goodwill, ending balance	251,216	253,399
Accumulated impairment losses, ending balance	(116,687)	(14,563)
Goodwill, net, ending balance	$ 134,529	$ 238,836