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Acquisition - Merger Related Indebtedness (Details)
Apr. 01, 2016
USD ($)
Senior Notes | Second Lien Notes due 2021  
Business Acquisition [Line Items]  
Debt instrument face amount $ 320,000,000.0
Debt instrument, percentage rate (as a percent) 6.50%
Line of Credit | Wells Fargo Credit Agreement | Letter of Credit  
Business Acquisition [Line Items]  
Borrowing capacity $ 10,000,000
Line of Credit | Wells Fargo Credit Agreement | Term Loan  
Business Acquisition [Line Items]  
Borrowing capacity 50,000,000
CVR Partners, LP | Line of Credit | Wells Fargo Credit Agreement | East Dubuque Merger  
Business Acquisition [Line Items]  
Payment of revolving debt $ 49,400,000