Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (199,155)	$ (191,125)
Indefinite-Lived Intangible Assets [Line Items]
Intangible assets, gross	448,669	451,666
Accumulated Amortization	(199,155)	(191,125)
Intangible assets, net	249,514	260,541
Trade names
Indefinite-Lived Intangible Assets [Line Items]
Trade names	248,574	251,481
Student relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	200,095	200,185
Accumulated Amortization	(199,155)	(191,125)
Net	940	9,060
Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (199,155)	$ (191,125)

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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