Leases - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$ 86,452	$ 99,490
Operating cash flows used for financing leases	69	52
Financing cash flows from finance leases	1,418	901
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	2,369	10,565
Finance leases	$ 1,695	$ 1,080