Leases - Summary of Leases Table (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating leases - Other assets	$ 5,313
Finance leases - Net property, plant, and equipment	8,133
Operating leases - Accrued liabilities	3,037
Finance leases - Short-term debt	8,128
Operating leases - Other liabilities	3,151
Total lease liabilities - operating leases	$ 6,188
Weighted-average remaining lease term (years) - operating leases	4 years
Weighted-average remaining lease term (years) - finance leases	1 year
Weighted-average discount rate - operating leases	4.60%
Weighted-average discount rate - finance leases	2.90%
Additions to ROU assets and lease liabilities - finance leases	$ 8,500