Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Leases:
Right-of-use assets, net	$ 47,662	$ 0
Current portion of operating lease liabilities	12,145	0
Operating lease liabilities	32,772	$ 0
Finance Leases:
Property, plant and equipment, net	2,346
Current maturities of long-term debt	1,125
Long-term debt	$ 1,144