Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 1,313,245	$ 1,299,949
Less accumulated depreciation and amortization	376,771	325,701
Property, plant and equipment, net	$ 936,474	974,248
Machinery, Equipment and Automotive [Member]
Property Plant And Equipment [Line Items]
Useful lives in years	25 years
Property, plant and equipment, gross	$ 1,204,695	1,189,438
Buildings and Improvements [Member]
Property Plant And Equipment [Line Items]
Useful lives in years	26 years
Property, plant and equipment, gross	$ 38,810	39,032
Land Improvements [Member]
Property Plant And Equipment [Line Items]
Useful lives in years	34 years
Property, plant and equipment, gross	$ 8,223	8,076
Furniture, Fixtures and Store Equipment [Member]
Property Plant And Equipment [Line Items]
Useful lives in years	3 years
Property, plant and equipment, gross	$ 1,122	1,122
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	31,575	28,753
Capital Spare Parts [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	24,245	28,945
Land [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 4,575	$ 4,583