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Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 6 Months Ended 12 Months Ended
May. 01, 2015
USD ($)
Oct. 31, 2014
Violations
Jun. 30, 2015
USD ($)
T
Dec. 31, 2002
Subsidiary
Dec. 31, 2012
USD ($)
Commitments And Contingencies [Line Items]          
Accrued liabilities for environmental matters     $ 497,000    
Penalty related to discharge water permit         $ 100,000
Percentage of payment of investigation costs agreed by Hallowell Facility     50.00%    
Insurance coverage of general liability risks     $ 100,000,000    
Product liability deductible per claim     250,000    
Pre-litigation demand amount $ 30,000,000        
Estimated litigation liability     0    
Insurance Claims [Member]          
Commitments And Contingencies [Line Items]          
Accrued general liability insurance claims     694,000    
Insurance Policy One [Member] | Climate Control [Member]          
Commitments And Contingencies [Line Items]          
Product liability deductible per claim     250,000    
Insurance Policy Two [Member] | Climate Control [Member]          
Commitments And Contingencies [Line Items]          
Product liability deductible per claim     $ 500,000    
Orica International [Member] | Ammonium Nitrate Supply Agreement [Member]          
Commitments And Contingencies [Line Items]          
Ammonium nitrate supply agreement maturity date     Apr. 09, 2015    
Notice of termination     Required notice of termination of one year    
Orica International [Member] | Ammonium Nitrate Supply Agreement [Member] | Minimum [Member]          
Commitments And Contingencies [Line Items]          
Current purchase agreement quantity with Orica International | T     240,000    
Hallowell Facility [Member]          
Commitments And Contingencies [Line Items]          
Number of subsidiaries under Chemical Business that sold their operating assets | Subsidiary       2  
El Dorado Facility [Member] | Nitric Acid Plant [Member]          
Commitments And Contingencies [Line Items]          
Project costs capitalized     $ 121,000,000    
El Dorado Facility [Member] | Ammonia Plant [Member]          
Commitments And Contingencies [Line Items]          
Project costs capitalized     243,000,000    
El Dorado Facility [Member] | Minimum [Member] | Nitric Acid Plant [Member]          
Commitments And Contingencies [Line Items]          
Estimated range of project costs to construct plant     140,000,000    
El Dorado Facility [Member] | Minimum [Member] | Ammonia Plant [Member]          
Commitments And Contingencies [Line Items]          
Estimated range of project costs to construct plant     405,000,000    
El Dorado Facility [Member] | Maximum [Member] | Nitric Acid Plant [Member]          
Commitments And Contingencies [Line Items]          
Estimated range of project costs to construct plant     142,000,000    
El Dorado Facility [Member] | Maximum [Member] | Ammonia Plant [Member]          
Commitments And Contingencies [Line Items]          
Estimated range of project costs to construct plant     420,000,000    
Cherokee Facility [Member]          
Commitments And Contingencies [Line Items]          
Accrued liabilities for environmental matters     100,000    
Number of alleged violations | Violations   11      
Environmental loss contingencies civil penalty     $ 26,000