Leases Lease Expense Components (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Operating lease cost:
Fixed lease expense	$ 134,733	$ 128,110
Variable lease expense	30,059	28,571
Finance lease cost:
Amortization of leased assets	6,077	5,826
Interest on lease liabilities	3,603	3,775
Net Lease Cost	$ 174,472	$ 166,282

Amount of interest expense on finance lease liability.

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

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- Definition

Amount of lease cost recognized by lessee for lease contract.

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Amount of operating lease expense. Excludes sublease income.

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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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