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Leases - Schedule of Components of Lease Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Lease Cost [Line Items]    
Amortization of right-of-use assets $ 38,568 $ 31,081
Variable lease cost 74,332 74,476
Total lease cost 316,519 292,246
Operating, administrative and other    
Lease Cost [Line Items]    
Operating lease cost 204,415 189,106
Interest expense    
Lease Cost [Line Items]    
Interest on lease liabilities 1,847 1,317
Revenue    
Lease Cost [Line Items]    
Sublease income (2,643) (3,734)
Cost of revenue    
Lease Cost [Line Items]    
Amortization of right-of-use assets 32,700 25,500
Variable lease cost 17,100 17,500
Depreciation and amortization    
Lease Cost [Line Items]    
Amortization of right-of-use assets 5,900 5,600
Operating administration and other costs    
Lease Cost [Line Items]    
Variable lease cost $ 55,600 $ 57,000