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Commitments and Contingencies - Additional Information (Detail)
MMBTU in Millions
 1 Months Ended 9 Months Ended 12 Months Ended
Mar. 03, 2016
T
May 01, 2015
USD ($)
Mar. 31, 2016
USD ($)
Jan. 31, 2016
USD ($)
Sep. 30, 2015
USD ($)
Dec. 31, 2014
Violation
Sep. 30, 2016
USD ($)
MMBTU
Settlement
$ / MMBTU
Dec. 31, 2002
Subsidiary
Dec. 31, 2012
USD ($)
Commitments And Contingencies [Line Items]                  
Natural gas purchase commitments | MMBTU             11.2    
Month purchase commitment period ends natural gas             2018-06    
Natural gas purchase commitments weighted average cost, per unit | $ / MMBTU             3.22    
Natural gas purchase commitments weighted average cost, amount             $ 36,200,000    
Natural gas purchase commitments weighted average market value per unit | $ / MMBTU             2.92    
Natural gas purchase commitments weighted average market value, amount             $ 32,800,000    
Accrued liabilities for environmental matters             231,000    
Penalty related to discharge water permit                 $ 100,000
Estimated litigation liability             $ 0    
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    
Pre-litigation demand amount   $ 18,000,000              
Cherokee Facility [Member]                  
Commitments And Contingencies [Line Items]                  
Payment of liabilities for environmental matters     $ 100,000            
Number of alleged violations | Violation           11      
Environmental loss contingencies civil penalty paid     $ 26,000            
Hallowell Facility [Member]                  
Commitments And Contingencies [Line Items]                  
Number of subsidiaries that sold their operating assets | Subsidiary               2  
Coffeyville Resources Nitrogen Fertilizers L.L.C. [Member]                  
Commitments And Contingencies [Line Items]                  
Initial terms of agreement 3 years                
Purchase agreement advance written notice termination period 180 days                
Global Industrial Inc [Member]                  
Commitments And Contingencies [Line Items]                  
Claimed amount payable by Global for certain work       $ 3,600,000 $ 18,000,000        
Estimated amount paid to Global of disputed amount         6,000,000        
Adjusted Estimated Claim Amount       5,000,000          
Liability amount       $ 0          
Global Industrial Inc [Member] | EL Dorado Ammonia L.L.C [Member]                  
Commitments And Contingencies [Line Items]                  
Estimated amount paid to Global of disputed amount         $ 3,500,000        
Pryor Chemical Company [Member]                  
Commitments And Contingencies [Line Items]                  
Agreement termination notice date             Mar. 01, 2016    
Agreement Termination effective date             May 31, 2016    
Maximum purchase commitment of urea ammonium nitrate tons per year | T 30,000                
Maximum purchase commitment of urea ammonium nitrate tons per quarter | T 10,000                
Purchase agreement advance written notice termination period 90 days                
Pryor Chemical Company [Member] | Minimum [Member]                  
Commitments And Contingencies [Line Items]                  
Percentage of storage capacity utilized             75.00%