XML 86 R39.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Leases Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Operating lease cost $ 499,464 $ 459,619
Depreciation of financing lease right-of-use assets 51,629 59,258
Interest expense for financing lease liabilities 19,942 21,031
Variable lease costs $ 111,501 $ 105,922
Operating leases, Remaining Lease Term 11 years 1 month 6 days 11 years
Finance leases, Remaining Lease Term 11 years 6 months 11 years 7 months 6 days
Operating leases, Discount Rate 6.90% 7.10%
Financing leases, Discount Rate 5.90% 5.70%