Related Party Transactions - Additional Information (Detail) - USD ($)		3 Months Ended	12 Months Ended
	Jan. 02, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 25, 2018
Related Party Transaction [Line Items]
Debt issuance costs							$ 15,200,000
Accrued Liabilities And Other Liabilities			$ 31,698,000	$ 50,990,000
Accelerated stock compensation expense				$ 2,700,000
Number of shares with accelerated vesting (in shares)				312,369
Dividends on convertible preferred stocks			300,000	$ 300,000	$ 300,000
Preferred stock, accumulated dividends			1,300,000
Extinguishment of estimated death benefit liability		$ (5,951,000)		(5,951,000)
Proceeds from sale of business				2,730,000
Term of agreement						2 years
Affiliate of LSB Funding [Member]
Related Party Transaction [Line Items]
Debt issuance costs			100,000
Consent fee incurred, associated with issuance of new notes			300,000
Daniel D. Greenwell [Member]
Related Party Transaction [Line Items]
Principal amount of notes sold				500,000
Accrued Liabilities And Other Liabilities				2,800,000
Dividends on convertible preferred stocks			0	0	0
Affiliate of SBC [Member]
Related Party Transaction [Line Items]
Principal amount of notes sold				50,000,000
Fee paid to affiliate				2,700,000
Two Employees of SBC and Affiliates Serving as Directors [Member]
Related Party Transaction [Line Items]
Directors fees			300,000		300,000	$ 300,000
Barry H. Golsen [Member]
Related Party Transaction [Line Items]
Directors fees			$ 100,000	$ 100,000	100,000
Jack E. Golsen [Member]
Related Party Transaction [Line Items]
Current term expiring date			Dec. 31, 2017
Retirement date			Dec. 31, 2017
Jack E. Golsen [Member] | Industrial Acquisitions LLC and Industrial Products LLC [Member]
Related Party Transaction [Line Items]
Loss on sales of businesses					800,000
Jack E. Golsen [Member] | Operating Other Expense [Member] | Industrial Acquisitions LLC and Industrial Products LLC [Member]
Related Party Transaction [Line Items]
Proceeds from sale of business					3,500,000
Jack E. Golsen [Member] | Operating Other Expense [Member] | Death Benefit Agreement [Member]
Related Party Transaction [Line Items]
Extinguishment of estimated death benefit liability					$ 1,400,000
Jack E. Golsen [Member] | Transition Agreement [Member]
Related Party Transaction [Line Items]
Agreement commencement date	Jan. 01, 2018
Payment of annual cash retainer fee	$ 480,000
Amount payable to cover certain monthly expense	4,400
Severance agreement, one-time payment	$ 2,320,000
Steven J. Golsen [Member]
Related Party Transaction [Line Items]
Consulting fee						$ 400,000