Discontinued Operations and Assets Held for Sale - Schedule of Carrying Amounts of the Major Classes of Assets and Liabilities Classified as Held For Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Total assets held for sale	$ 6,164	$ 1,917,435
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Total liabilities held for sale	10,849	702,256
Discontinued Operations, Held-for-sale
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Cash and cash equivalents	0	270,164
Receivables, net	0	113,386
Property and equipment, net	0	259,471
Goodwill and tradenames	0	1,202,496
Operating lease assets	6,164	136,806
Other assets	0	183,742
Valuation allowance on held-for-sale disposal groups	0	(248,630)
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Deferred revenue and student deposits	0	87,793
Operating leases, including current portion	10,849	151,413
Long-term debt, seller notes and finance leases, including current portion	0	171,451
Other liabilities	$ 0	$ 291,599