Leases - Schedule of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating Leases
Operating lease cost	$ 17,506	$ 29,848	$ 61,763	$ 78,662
Finance Leases
Amortization of right-of-use assets	11,386	0	27,747	0
Interest on lease liabilities	620	0	1,600	0
Short-term lease cost	1,001	2,527	3,326	6,459
Variable lease cost	3,899	5,286	10,943	11,582
Total lease cost	$ 34,412	$ 37,661	$ 105,379	$ 96,703