Leases - Future Minimum Lease Payments Under Non-Cancelable Operating and Capital Leases (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Operating leases
2021	$ 480,439
2022	504,789
2023	464,023
2024	412,419
2025	361,447
Thereafter	1,437,965
Total future minimum lease payments due under operating leases	3,661,082
Less portion representing interest, operating lease liabilities	(552,915)
Present value of lease liabilities, operating leases	3,108,167
Finance leases
2021	35,039
2022	35,124
2023	35,645
2024	35,669
2025	35,539
Thereafter	174,907
Total future minimum payments due under finance leases	351,923
Less portion representing interest, financing lease liabilities	(77,631)
Financing lease obligations	$ 274,292