Leases - Supplemental Cash Flow Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 34,791
Operating cash flows for finance leases	3,928
Financing cash flows for finance leases	13,921
ROU assets added for operating leases:
Operating leases	$ 20,266