Leases - Supplemental Cash Flow Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Leases
Operating cash flows from operating leases	$ 209,435
Operating cash flows from finance leases	4,637
Financing cash flows from finance leases	17,681
Operating leases	110,235
Finance leases	187,339
Right-of-use assets and liabilities recognized upon adoption of ASC 842	$ 733,584