v3.26.1
Goodwill and Other Intangible Assets (Other Intangible Assets) (Details 2) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Amortized Intangible Assets [Line Items]    
Gross Carrying Amount $ 490,196 $ 509,378
Accumulated Amortization 440,787 447,747
Net Carrying Amount 49,409 61,631
Intangible Asset, Indefinite-Lived [Line Items]    
Indefinite-Lived Intangible Assets 170,337 170,805
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 62,185 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 296,900 307,312
Accumulated Amortization 263,999 266,453
Net Carrying Amount $ 32,901 $ 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 $ 107,337 $ 114,227
Accumulated Amortization 94,370 98,147
Net Carrying Amount $ 12,967 $ 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 16,457 15,588
Net Carrying Amount 943 1,812
Databases and Technology [Member]    
Amortized Intangible Assets [Line Items]    
Gross Carrying Amount 30,496 32,376
Accumulated Amortization 28,568 30,293
Net Carrying Amount $ 1,928 $ 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 $ 38,063 $ 38,063
Accumulated Amortization 37,393 37,266
Net Carrying Amount $ 670 $ 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