XML 68 R56.htm IDEA: XBRL DOCUMENT v3.19.2
Inventory Financing Agreements - Washington Refinery Intermediation Agreement (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 11, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Supply Commitment [Line Items]          
Supply and exchange agreement expenses   $ 20,278,000 $ 10,544,000 $ 38,988,000 $ 18,921,000
Washington Refinery Intermediation Agreement          
Supply Commitment [Line Items]          
Percentage of receivables and inventory for deferred payment arrangement 95.00%        
Amount of deferred payment arrangement $ 90,000,000        
Unused capacity, commitment fee percentage 1.50%        
Outstanding receivable advance balance   62,500,000   62,500,000  
Supply and exchange agreement expenses   1,500,000   2,800,000  
Washington Refinery Intermediation Agreement | Shipping and Handling          
Supply Commitment [Line Items]          
Handling fees   900,000   1,700,000  
Washington Refinery Intermediation Agreement | Letter of Credit          
Supply Commitment [Line Items]          
Balance outstanding on the credit facility   $ 65,900,000   $ 65,900,000  
London Interbank Offered Rate (LIBOR) | Washington Refinery Intermediation Agreement          
Supply Commitment [Line Items]          
Margin on LIBOR rate 3.25%