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Supplemental Cash Flow Information - Supplemental Cash Flow Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ (27,610)	$ (29,482)
Operating cash flows from finance leases	(27)	(17)
Financing cash flows from finance leases	(249)	(201)
Lease assets obtained in exchange for lease liabilities:
Operating leases	17,927	29,693
Finance leases	$ 1,505	$ 866

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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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