Goodwill and Other Intangible Assets (Other Intangible Assets) (Details 2) - USD ($) $ in Thousands	Jun. 30, 2024		Dec. 31, 2023
Amortized Intangible Assets [Line Items]
Gross Carrying Amount	$ 495,426		$ 521,752
Accumulated Amortization	422,418		409,558
Net Carrying Amount	73,008		112,194
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	187,379		187,862
Franchise Agreements [Member]
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	92,158		92,158
Trade Names and Trademarks [Member]
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	84,050		84,533
FCC licenses [Member]
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	11,000		11,000
Other [Member]
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	171		171
Student and Customer Relationships [Member]
Amortized Intangible Assets [Line Items]
Gross Carrying Amount	282,234		283,098
Accumulated Amortization	246,479		236,776
Net Carrying Amount	$ 35,755		$ 46,322
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	$ 117,971		$ 143,389
Accumulated Amortization	90,563		90,558
Net Carrying Amount	$ 27,408		$ 52,831
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	[1]	15 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	12,977		13,348
Net Carrying Amount	4,423		4,052
Databases and Technology [Member]
Amortized Intangible Assets [Line Items]
Gross Carrying Amount	36,307		36,538
Accumulated Amortization	36,192		35,712
Net Carrying Amount	$ 115		$ 826
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	$ 41,514		$ 41,327
Accumulated Amortization	36,207		33,164
Net Carrying Amount	$ 5,307		$ 8,163
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

[1] As of December 31, 2023, the trade names and trademarks’ maximum useful life was 15 years.