Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Subject to amortization
Accumulated amortization	$ (152,627)	$ (135,703)
Total
Intangible assets, gross	460,817	462,123
Intangible assets, net	308,190	326,420
Trade names
Not Subject to amortization
Indefinite-lived intangible assets	258,340	259,262
Student relationships
Subject to amortization
Gross carrying amount	202,477	202,861
Accumulated amortization	(152,627)	(135,703)
Net	$ 49,850	$ 67,158