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Related Party Transactions (Indirect Charges) (Details) (Western Refining, Inc. [Member], USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Related Party Transaction [Line Items]    
Related Party Transaction, Expenses from Transactions with Related Party $ 10,990us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty $ 10,483us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
General and Administrative Expense [Member]    
Related Party Transaction [Line Items]    
Related Party Transaction, Expenses from Transactions with Related Party 1,983us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= wnr_WesternRefiningInc.Member		 1,825us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_GeneralAndAdministrativeExpenseMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= wnr_WesternRefiningInc.Member
Operating Expense [Member]    
Related Party Transaction [Line Items]    
Related Party Transaction, Expenses from Transactions with Related Party $ 9,007us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= wnr_WesternRefiningInc.Member		 $ 8,658us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= wnr_WesternRefiningInc.Member