Leases - Supplemental cash flow information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 39,429	$ 36,932
Operating cash flows for finance leases	96	0
Financing cash flows for finance leases	2,445	0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	36,782	26,710
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 3,964	$ 2,316