Leases - Supplemental cash flow information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 12,331	$ 11,076
Operating cash flows for finance leases	33	0
Financing cash flows for finance leases	721	0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	10,968	9,249
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 1,930	$ 452