v3.26.3
Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2026
Sep. 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   18,121
Impairment   (976)
Disposition   0
Reclassification to assets held for sale   (51,786)
Foreign currency exchange rate changes   368
Goodwill, ending balance   1,996,761
Accumulated impairment losses, ending balance   (445,368)
Goodwill, net, ending balance   1,551,393
Education Division [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
Reclassification to assets held for sale   (51,786)
Foreign currency exchange rate changes   368
Goodwill, ending balance   1,128,890
Accumulated impairment losses, ending balance   (331,151)
Goodwill, net, ending balance   797,739
Education Division [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
Reclassification to assets held for sale   (51,786)
Foreign currency exchange rate changes   431
Goodwill, ending balance   561,765
Accumulated impairment losses, ending balance   0
Goodwill, net, ending balance   561,765
Education Division [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
Reclassification to assets held for sale   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 Division [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
Reclassification to assets held for sale   0
Foreign currency exchange rate changes   (63)
Goodwill, ending balance   392,561
Accumulated impairment losses, ending balance   (219,827)
Goodwill, net, ending balance   172,734
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
Reclassification to assets held for sale   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   18,121
Impairment   0
Disposition   0
Reclassification to assets held for sale   0
Foreign currency exchange rate changes   0
Goodwill, ending balance   154,758
Accumulated impairment losses, ending balance   0
Goodwill, net, ending balance   154,758
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
Reclassification to assets held for sale   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   18,121
Impairment   0
Disposition   0
Reclassification to assets held for sale   0
Foreign currency exchange rate changes   0
Goodwill, ending balance   67,618
Accumulated impairment losses, ending balance   0
Goodwill, net, ending balance   67,618
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
Reclassification to assets held for sale   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
Reclassification to assets held for sale   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
Reclassification to assets held for sale   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