Leases - Schedule of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Leases
Operating lease cost	$ 18,304	$ 18,027	$ 36,165	$ 44,257
Finance Leases
Amortization of right-of-use assets	5,649	10,194	13,455	16,361
Interest on lease liabilities	278	540	572	980
Short-term lease cost	1,205	1,311	3,060	2,325
Variable lease cost	1,813	3,304	3,774	7,044
Total lease cost	$ 27,249	$ 33,376	$ 57,026	$ 70,967

Finance Lease, Lease Cost

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Operating Lease, Cost

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No definition available.

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- Definition

Amount of interest expense on finance lease liability.

+ References

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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