Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss and tax credits carryforwards	$ 246,405	$ 410,456
Operating lease asset	135,365	140,500
Depreciation	45,702	45,717
Interest	25,029	32,282
Deferred compensation	23,219	16,997
Deferred revenue	11,432	10,913
Nondeductible reserves	9,470	24,835
Allowance for doubtful accounts	8,437	13,552
Unrealized loss	0	3,128
Total deferred tax assets	505,059	698,380
Deferred tax liabilities:
Operating lease liability	122,728	127,131
Investment in subsidiaries	74,310	71,183
Amortization of intangible assets	41,776	133,091
Deferred gain on Walden	14,652	0
Unrealized Gain	2,559	0
Other	0	1,918
Total deferred tax liabilities	256,025	333,323
Net deferred tax assets	249,034	365,057
Valuation allowance for deferred tax assets	(283,945)	(320,858)
Net deferred tax (liabilities) assets	$ (34,911)
Deferred tax assets, net		$ 44,199