Leases - Cash Flow (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of liabilities
Financing cash flows from finance leases	$ 1,571
Cash flows from operating activities	559
Cash flows from operating activities	71,181
Non-cash supplemental amounts
ROU assets obtained in exchange for new finance lease liabilities	198
ROU assets obtained in exchange for new operating lease liabilities	$ 15,532