Other Operating Expense (Income) - Additional Information (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019 USD ($) $ / ft²	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Other Operating Income Expenses [Line Items]
Impairment of right-of use assets | $		$ 3,886
Written down of assets at salvage value | $	$ 0		$ 0
Pic Onyx Inc
Other Operating Income Expenses [Line Items]
Impairment related to investment | $	4,130
Other Operating Expenses
Other Operating Income Expenses [Line Items]
Impairment of right-of use assets | $	35,194	3,886
Impairment | $			8,101
Written down of assets at salvage value | $	0		0
Impairment | $	$ 169,872	$ 8,101
Fair value impaired assets	34,421
Salvage value of major equipment at idled location	3.50%
Salvage value of major equipment at active location	7.00%
Salvage value of equipment	0.00%
Goodwill impairment | $			$ 3,500
Other Operating Expenses | Land | Market Approach | Minimum [Member]
Other Operating Income Expenses [Line Items]
Value of comparable property	0.20
Other Operating Expenses | Land | Market Approach | Maximum
Other Operating Income Expenses [Line Items]
Value of comparable property	5.00
Other Operating Expenses | Building Improvements | Cost Approach | Minimum [Member]
Other Operating Income Expenses [Line Items]
Value of comparable property	21.00
Other Operating Expenses | Building Improvements | Cost Approach | Maximum
Other Operating Income Expenses [Line Items]
Value of comparable property	56.00
Other Operating Expenses | Machinery and Equipment | Minimum [Member]
Other Operating Income Expenses [Line Items]
Range of salvage value	0.00%		0.00%
Other Operating Expenses | Machinery and Equipment | Maximum
Other Operating Income Expenses [Line Items]
Range of salvage value	7.00%		7.00%
Other Operating Expenses | Toomsboro Facility | Market Approach
Other Operating Income Expenses [Line Items]
Value of comparable property	18.00
Other Operating Expenses | Toomsboro Facility | Market Approach | Minimum [Member]
Other Operating Income Expenses [Line Items]
Value of comparable property	14.21
Other Operating Expenses | Toomsboro Facility | Market Approach | Maximum
Other Operating Income Expenses [Line Items]
Value of comparable property	21.79
Other Operating Expenses | New Iberia Facility | Market Approach
Other Operating Income Expenses [Line Items]
Value of comparable property	10.00
Other Operating Expenses | New Iberia Facility | Market Approach | Minimum [Member]
Other Operating Income Expenses [Line Items]
Value of comparable property	6.37
Other Operating Expenses | New Iberia Facility | Market Approach | Maximum
Other Operating Income Expenses [Line Items]
Value of comparable property	12.67
Other Operating Expenses | Eufaula Facility | Market Approach
Other Operating Income Expenses [Line Items]
Value of comparable property	15.00
Other Operating Expenses | Eufaula Facility | Market Approach | Minimum [Member]
Other Operating Income Expenses [Line Items]
Value of comparable property	11.25
Other Operating Expenses | Eufaula Facility | Market Approach | Maximum
Other Operating Income Expenses [Line Items]
Value of comparable property	19.55
Other Operating Expenses | Marshfield Facility | Market Approach
Other Operating Income Expenses [Line Items]
Value of comparable property	15.00
Excess land fair value	0.10
Other Operating Expenses | Marshfield Facility | Market Approach | Minimum [Member]
Other Operating Income Expenses [Line Items]
Value of comparable property	11.40
Other Operating Expenses | Marshfield Facility | Market Approach | Maximum
Other Operating Income Expenses [Line Items]
Value of comparable property	18.75