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 from Operating Leases	$ 48,308
Operating Cash Flows from Finance Leases	974
Financing Cash Flows from Finance Leases	5,322
Right-of-Use Assets Obtained in Exchange for Lease Obligations:
Operating Leases	15,347
Finance Leases	$ 1,722