v3.26.1
Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Jun. 30, 2026
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 2,031,034 $ 2,031,034
Accumulated impairment losses, beginning balance (445,368) (445,368)
Goodwill, net, beginning balance 1,585,666 1,585,666
Acquisition   17,996
Impairment   (976)
Disposition   0
Foreign currency exchange rate changes   (2,113)
Goodwill, ending balance   2,045,941
Accumulated impairment losses, ending balance   (445,368)
Goodwill, net, ending balance   1,600,573
Education [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning balance 1,181,284 1,181,284
Accumulated impairment losses, beginning balance (331,151) (331,151)
Goodwill, net, beginning balance 850,133 850,133
Acquisition   0
Impairment   (976)
Disposition   0
Foreign currency exchange rate changes   (2,113)
Goodwill, ending balance   1,178,195
Accumulated impairment losses, ending balance   (331,151)
Goodwill, net, ending balance   847,044
Education [Member] | Kaplan International [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning balance 614,096 614,096
Accumulated impairment losses, beginning balance 0 0
Goodwill, net, beginning balance 614,096 614,096
Acquisition   0
Impairment (1,000) (976)
Disposition   0
Foreign currency exchange rate changes   (2,049)
Goodwill, ending balance   611,071
Accumulated impairment losses, ending balance   0
Goodwill, net, ending balance   611,071
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
Acquisition   0
Impairment   0
Disposition   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 392,624 392,624
Accumulated impairment losses, beginning balance (219,827) (219,827)
Goodwill, net, beginning balance 172,797 172,797
Acquisition   0
Impairment   0
Disposition   0
Foreign currency exchange rate changes   (64)
Goodwill, ending balance   392,560
Accumulated impairment losses, ending balance   (219,827)
Goodwill, net, ending balance   172,733
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
Acquisition   0
Impairment   0
Disposition   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 Division [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning balance 136,637 136,637
Accumulated impairment losses, beginning balance 0 0
Goodwill, net, beginning balance 136,637 136,637
Acquisition   17,996
Impairment   0
Disposition   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 Division [Member] | CSI [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning balance 87,140 87,140
Accumulated impairment losses, beginning balance 0 0
Goodwill, net, beginning balance 87,140 87,140
Acquisition   0
Impairment   0
Disposition   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 Division [Member] | Other Healthcare [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning balance 49,497 49,497
Accumulated impairment losses, beginning balance 0 0
Goodwill, net, beginning balance 49,497 49,497
Acquisition   17,996
Impairment   0
Disposition   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 272,523 272,523
Accumulated impairment losses, beginning balance (82,062) (82,062)
Goodwill, net, beginning balance 190,461 190,461
Acquisition   0
Impairment   0
Disposition   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 140,832 140,832
Accumulated impairment losses, beginning balance 0 0
Goodwill, net, beginning balance 140,832 140,832
Acquisition   0
Impairment   0
Disposition   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 108,943 108,943
Accumulated impairment losses, beginning balance (32,155) (32,155)
Goodwill, net, beginning balance $ 76,788 76,788
Acquisition   0
Impairment   0
Disposition   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