Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 89,179	$ 125,307
Operating cash flows from finance leases	4,429	8,355
Financing cash flows from finance leases	$ 19,778	$ 32,090