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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Lessee, Lease, Description [Line Items]    
Operating lease cost $ 197,128 $ 159,913
Short-term lease cost 15,849 14,412
Variable lease cost 55,494 39,134
Sublease income (22,064) (5,119)
Total operating lease costs 246,407 208,340
Real Estate Arrangements    
Lessee, Lease, Description [Line Items]    
Operating lease cost 83,574 63,893
Short-term lease cost 229 111
Variable lease cost 21,235 15,610
Sublease income (22,064) (5,119)
Total operating lease costs 82,974 74,495
Co-location Arrangements    
Lessee, Lease, Description [Line Items]    
Operating lease cost 113,554 96,020
Short-term lease cost 15,620 14,301
Variable lease cost 34,259 23,524
Sublease income 0 0
Total operating lease costs $ 163,433 $ 133,845