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Commitments and Contingencies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2018
USD ($)
Settlement
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2018
USD ($)
Mar. 31, 2016
USD ($)
Commitments And Contingencies [Line Items]          
Expenses incurred in operating lease agreements $ 10,235,000 $ 9,813,000 $ 9,933,000    
Outstanding letters of credit 2,700,000        
Customer advances and deposits 1,783,000 $ 1,334,000      
Estimated share of the annual operating costs of pipeline, minimum 100,000        
Estimated share of the annual operating costs of pipeline, maximum $ 150,000        
Operating agreement The initial term of the operating agreement is through December 2053.        
Indemnify the sureties for payments $ 10,000,000        
Payments under employment and severance agreements 6,200,000        
Settle of invoices held in account payable 1,100,000        
Recovery from litigation settlement 4,600,000        
Accrued liabilities for environmental matters $ 183,000        
Penalty imposed to resolve outstanding permit violations       $ 124,000  
Percentage of payment of investigation costs agreed by Hallowell Facility 50.00%        
Insurance coverage of general liability and auto liability risks $ 100,000,000        
Product liability deductible per claim $ 250,000        
Confidential settlement agreement with family groups | Settlement 3        
Liability reserve $ 0        
Estimated litigation liability 18,450,000        
Global Industrial Inc [Member]          
Commitments And Contingencies [Line Items]          
Estimated litigation liability         $ 0
Property, Plant and Equipment [Member]          
Commitments And Contingencies [Line Items]          
Recovery from litigation settlement 200,000        
Cost of Sales [Member]          
Commitments And Contingencies [Line Items]          
Recovery from litigation settlement $ 4,400,000        
UAN Supply Agreement [Member]          
Commitments And Contingencies [Line Items]          
Initial terms of agreement expiry date 2019-05        
Notice of termination notice of termination at least twelve months prior to the end of term        
Ammonia Supply Agreement [Member]          
Commitments And Contingencies [Line Items]          
Initial terms of agreement expiry date 2020-06        
Notice of termination notice of termination at least nine months prior to the end of term        
Supply commitment, description the ammonia that (a) will be produced at the El Dorado Facility and (b) that is in excess of El Dorado’s needs.        
Pryor Chemical Company [Member]          
Commitments And Contingencies [Line Items]          
Litigation settlement, expense paid $ 500,000        
Litigation settlement,received $ 4,000,000        
Pryor Chemical Company [Member] | UAN Supply Agreement [Member]          
Commitments And Contingencies [Line Items]          
Required period for notice of termination 90 days        
Coffeyville Resources Nitrogen Fertilizers L.L.C. [Member] | UAN Supply Agreement [Member]          
Commitments And Contingencies [Line Items]          
Required period for notice of termination 180 days        
Leidos Constructors, LLC [Member] | Global Industrial Inc [Member] | Accounts Payable [Member]          
Commitments And Contingencies [Line Items]          
Claim amount not approved for payment         $ 3,500,000