v3.20.2
Revenue - Revenue Disaggregated by Product (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation of Revenue [Line Items]        
Net sales $ 105,091 $ 137,660 $ 180,172 $ 229,533
Net sales, exclusive of freight and other        
Disaggregation of Revenue [Line Items]        
Net sales 95,594 128,502 160,287 210,589
Ammonia        
Disaggregation of Revenue [Line Items]        
Net sales 36,765 49,954 50,911 63,306
UAN        
Disaggregation of Revenue [Line Items]        
Net sales 55,294 73,542 102,308 137,606
Urea products        
Disaggregation of Revenue [Line Items]        
Net sales 3,535 5,006 7,068 9,677
Freight revenue        
Disaggregation of Revenue [Line Items]        
Net sales 6,954 7,139 14,677 15,157
Other revenue        
Disaggregation of Revenue [Line Items]        
Net sales $ 2,543 $ 2,019 $ 5,208 $ 3,787