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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
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 $ 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