Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	[1]
Operating Leases
Operating lease right-of-use assets	$ 23,901	$ 0
Current portion of operating lease liabilities included in Other accrued liabilities	7,722
Operating lease liabilities	16,656	0
Total operating lease liabilities	24,378
Finance Leases
Property, plant and equipment, at cost	15,367
Accumulated depreciation	(3,941)
Property, plant and equipment, net	11,426
Current installments of finance lease obligations	6,758	5,409
Finance lease obligations	717	$ 6,272
Total finance lease obligations	$ 7,475
Weighted Average Remaining Lease Term (years)
Operating leases	6 years 3 months 3 days
Finance leases	11 months 19 days
Weighted Average Discount Rate
Operating leases	5.27%
Finance leases	6.83%

[1] Financial information has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 2 – Significant Accounting Policies and Practices.