Discontinued Operations and Assets Held for Sale - Summary of Major Classes of Assets and Liabilities Reclassified to Held for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets of Discontinued Operations
Subtotal: assets of Discontinued Operations	$ 2,108,700	$ 3,807,529
Liabilities of Discontinued Operations
Total liabilities held for sale	969,887	1,450,141
Discontinued operations
Assets of Discontinued Operations
Cash and cash equivalents	113,016	333,455
Receivables, net	152,557	209,704
Property and equipment, net	243,030	741,119
Goodwill	648,018	1,003,765
Tradenames	438,477	665,207
Operating lease right-of-use assets, net	169,991	399,345
Other assets	336,484	446,458
Subtotal: assets of Discontinued Operations	2,101,573	3,799,053
Liabilities of Discontinued Operations
Deferred revenue and student deposits	203,865	176,255
Operating leases, including current portion	185,473	388,202
Long-term debt, seller notes and finance leases, including current portion	180,112	304,355
Other liabilities	400,437	581,329
Other Land And Buildings | Assets classified as held for sale
Assets of Discontinued Operations
Property and equipment, net	$ 7,127	$ 8,476