Goodwill and Other Intangible Assets - Summary of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets, Net [Abstract]
Accumulated Amortization	$ (55,591)	$ (52,827)
Tradenames, net	169,183	151,645
Gross Carrying Amount	224,774	204,472
Net Carrying Amount	169,183	151,645
Tradenames
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	30,652
Accumulated Amortization	(30,652)
Net Carrying Amount		0
Student rosters
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	23,001	20,455
Accumulated Amortization	(23,001)	(20,455)
Net Carrying Amount	0	0
Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	1,938	1,720
Accumulated Amortization	(1,938)	(1,720)
Net Carrying Amount	0	0
Tradenames
Finite-Lived Intangible Assets, Net [Abstract]
Accumulated Amortization	(30,652)	(30,652)
Gross Carrying Amount	199,835
Net Carrying Amount	169,183
Tradenames
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		30,652
Accumulated Amortization		(30,652)
Tradenames, net	$ 169,183	151,645
Net Carrying Amount		0
Gross Carrying Amount		182,297
Net Carrying Amount		$ 151,645