Goodwill and Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross/net carrying amount		$ 3,721
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Net Carrying Amount	$ 88,936	3,721
RU Segment
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	35,500
Accumulated Amortization	1,285
Net Carrying Amount	34,215
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	86,500
Accumulated Amortization	1,285
Net Carrying Amount	85,215
Trade name
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross/net carrying amount		1,998
Trade name | RU Segment
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross/net carrying amount	26,500
Accreditation, licensing and Title IV
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross/net carrying amount		1,686
Accreditation, licensing and Title IV | RU Segment
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross/net carrying amount	24,500
Affiliation agreements
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross/net carrying amount		$ 37
Affiliation agreements | RU Segment
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross/net carrying amount	51,000
Student Roster | RU Segment
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	20,000
Accumulated Amortization	833
Net Carrying Amount	19,167
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	833
Curricula | RU Segment
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	14,000
Accumulated Amortization	389
Net Carrying Amount	13,611
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	389
Lead conversions | RU Segment
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	1,500
Accumulated Amortization	63
Net Carrying Amount	1,437
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ 63