Leases - Other Information (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 85,141	$ 81,827
Operating cash flows from operating leases	202,861	154,262
Financing cash flows from finance leases	130,129	74,446
Right-of-use assets obtained in exchange for lease obligations
Finance leases	374,529	357,137
Operating leases	$ 9,359	$ 65,906
Weighted-average remaining lease term - finance leases	14 years		14 years
Weighted-average remaining lease term - operating leases	12 years		12 years
Weighted-average discount rate - finance leases	7.00%		7.00%
Weighted-average discount rate - operating leases	4.00%		4.00%
Finance lease right-of-use assets	$ 1,889,573		$ 1,688,032
Accumulated amortization, finance lease, right-of-use asset	$ 689,200		$ 604,100

Cash Flow, Lessee [Abstract]

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Right-Of-Use Assets Obtained in Exchange for Lease Obligations [Abstract]

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Amount of interest paid on finance lease liability.

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Amount of cash outflow for principal payment on finance lease.

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Amount of accumulated amortization of right-of-use asset from finance lease.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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