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Long-Term Debt and Finance Lease Obligations - Petroleum ABL (Details) - Amended and Restated Asset Based (Petroleum ABL) Credit Agreement - Credit Parties
Nov. 14, 2017
USD ($)
Debt Instrument [Line Items]  
Borrowing capacity $ 400,000,000
Uncommitted incremental facility 200,000,000
Letter of Credit  
Debt Instrument [Line Items]  
Borrowing capacity 60,000,000
Swingline Loans  
Debt Instrument [Line Items]  
Borrowing capacity $ 40,000,000