Goodwill and Other Intangible Assets - Summary of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets, Net [Abstract]
Accumulated Amortization	$ (52,827)	$ (51,499)
Tradenames, net	151,645	142,848
Gross Carrying Amount	204,472	194,347
Net Carrying Amount	151,645	142,848
Trade Names
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	30,652
Accumulated Amortization	(30,652)
Total		0
Student rosters
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	20,455	19,231
Accumulated Amortization	(20,455)	(19,231)
Total	0	0
Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	1,720	1,616
Accumulated Amortization	(1,720)	(1,616)
Total	0	0
Trade Names
Finite-Lived Intangible Assets, Net [Abstract]
Accumulated Amortization	(30,652)	(30,652)
Gross Carrying Amount	182,297
Net Carrying Amount	151,645
Trade Names
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		30,652
Accumulated Amortization		(30,652)
Tradenames, net	$ 151,645	142,848
Total		0
Gross Carrying Amount		173,500
Net Carrying Amount		$ 142,848