Lease Accounting - Lessee, Other Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ (19,280)
Operating cash flows from finance leases	(2,165)
Financing cash flows from finance leases	(9,374)
Right-of-use assets obtained in exchange for lease obligations
Operating leases	8,308	$ 0
Finance leases	$ 26,122	$ 10,585
Weighted-average remaining lease term (years)
Operating leases	6 years 6 months
Finance leases	4 years 7 months 6 days
Weighted-average discount rate
Operating leases	4.10%
Finance leases	5.50%