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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
 9 Months Ended
Sep. 30, 2020
USD ($)
Facility
Summary Of Significant Accounting Policies [Line Items]  
Number of facilities for manufacture and distribution of products | Facility 4
Tax benefit recognized greater than 50%
El Dorado Chemical Company [Member]  
Summary Of Significant Accounting Policies [Line Items]  
Litigation settlement received from other party $ 4.3
Litigation settlement, services and parts awarded from other party 2.8
Litigation settlement, expense paid 2.7
Settle of invoices held in account payable 3.2
El Dorado Chemical Company [Member] | Property, Plant and Equipment [Member]  
Summary Of Significant Accounting Policies [Line Items]  
Recovery from litigation settlement 1.9
Cost of Sales [Member] | El Dorado Chemical Company [Member]  
Summary Of Significant Accounting Policies [Line Items]  
Recovery from litigation settlement $ 5.7