v3.26.3
Goodwill and Other Intangible Assets (Other Intangible Assets) (Details 2) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Amortized Intangible Assets [Line Items]    
Gross Carrying Amount $ 479,332 $ 509,378
Accumulated Amortization 435,697 447,747
Net Carrying Amount 43,635 61,631
Intangible Asset, Indefinite-Lived [Line Items]    
Indefinite-Lived Intangible Assets 170,339 170,805
Franchise Agreements [Member]    
Intangible Asset, Indefinite-Lived [Line Items]    
Indefinite-Lived Intangible Assets 97,002 97,002
Trade Names and Trademarks [Member]    
Intangible Asset, Indefinite-Lived [Line Items]    
Indefinite-Lived Intangible Assets 62,187 62,653
FCC licenses [Member]    
Intangible Asset, Indefinite-Lived [Line Items]    
Indefinite-Lived Intangible Assets 11,000 11,000
Other [Member]    
Intangible Asset, Indefinite-Lived [Line Items]    
Indefinite-Lived Intangible Assets 150 150
Student and Customer Relationships [Member]    
Amortized Intangible Assets [Line Items]    
Gross Carrying Amount 286,235 307,312
Accumulated Amortization 257,124 266,453
Net Carrying Amount $ 29,111 $ 40,859
Student and Customer Relationships [Member] | Minimum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 2 years 2 years
Student and Customer Relationships [Member] | Maximum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 10 years 10 years
Trade Names and Trademarks [Member]    
Amortized Intangible Assets [Line Items]    
Gross Carrying Amount $ 107,338 $ 114,227
Accumulated Amortization 95,613 98,147
Net Carrying Amount $ 11,725 $ 16,080
Trade Names and Trademarks [Member] | Minimum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 2 years 2 years
Trade Names and Trademarks [Member] | Maximum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 10 years 10 years
Network Affiliation Agreements [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 10 years 10 years
Gross Carrying Amount $ 17,400 $ 17,400
Accumulated Amortization 16,893 15,588
Net Carrying Amount 507 1,812
Databases and Technology [Member]    
Amortized Intangible Assets [Line Items]    
Gross Carrying Amount 30,496 32,376
Accumulated Amortization 28,811 30,293
Net Carrying Amount $ 1,685 $ 2,083
Databases and Technology [Member] | Minimum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 3 years 3 years
Databases and Technology [Member] | Maximum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 6 years 6 years
Other [Member]    
Amortized Intangible Assets [Line Items]    
Gross Carrying Amount $ 37,863 $ 38,063
Accumulated Amortization 37,256 37,266
Net Carrying Amount $ 607 $ 797
Other [Member] | Minimum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 1 year 1 year
Other [Member] | Maximum [Member]    
Amortized Intangible Assets [Line Items]    
Useful Life 8 years 8 years