Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)	$ 71,793us-gaap_NetIncomeLoss	$ (41,794)us-gaap_NetIncomeLoss	$ (50,214)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	17,372	15,970	14,315
Reserve for doubtful accounts	88us-gaap_ProvisionForDoubtfulAccounts	0us-gaap_ProvisionForDoubtfulAccounts	0us-gaap_ProvisionForDoubtfulAccounts
Amortization of loan fees	523us-gaap_AmortizationOfFinancingCosts	109us-gaap_AmortizationOfFinancingCosts	0us-gaap_AmortizationOfFinancingCosts
Unit-based compensation expense	1,564us-gaap_RestrictedStockExpense	49us-gaap_RestrictedStockExpense	0us-gaap_RestrictedStockExpense
Loss (gain) and impairments on disposal of assets, net	157	0	(174)
Accounts receivable - Third-party	(54,377)	(105)	(290)
Accounts receivable - Affiliate	(40,625)	(11,431)	0
Inventories	1,799us-gaap_IncreaseDecreaseInInventories	(2,585)us-gaap_IncreaseDecreaseInInventories	(1,365)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses	(1,466)	769	17,342
Other assets	(1,547)	(501)	1,081
Accounts payable and accrued liabilities	122,741	6,912	(109,158)
Other long-term liabilities	(5)	5	(24)
Net cash provided by (used in) operating activities	118,017	(32,602)	(128,487)
Cash flows from investing activities:
Capital expenditures	(22,325)	(72,398)	(28,076)
Distributions to Predecessor affiliate	(21,068)	0	0
Proceeds from sale of assets	106	36	291
Net cash used in investing activities	(43,287)	(72,362)	(27,785)
Cash flows from financing activities:
Borrowings on revolving credit facility	269,000	0	0
Quarterly distribution to Western	(35,042)	0	0
Quarterly distribution to non-controlling interest holders	(18,394)	0	0
Proceeds from issuance of common units, net of underwriters' discount and commissions	0	325,263	0
Offering costs for issuance of common units	0us-gaap_PaymentsOfStockIssuanceCosts	(2,117)us-gaap_PaymentsOfStockIssuanceCosts	0us-gaap_PaymentsOfStockIssuanceCosts
Deferred financing costs	0us-gaap_PaymentsOfFinancingCosts	(2,616)us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts
Contributions from affiliate	0	113,317	156,273
Distribution to Western due to acquisitions	(320,000)	(244,884)	0
Net cash provided by (used in) financing activities	(104,436)	188,963	156,273
Net change in cash and cash equivalents	(29,706)	83,999	1
Cash and cash equivalents at beginning of year	84,004	5	4
Cash and cash equivalents at end of year	54,298	84,004	5
Supplemental Cash Flow Information [Abstract]
Income taxes paid	1us-gaap_IncomeTaxesPaidNet	0us-gaap_IncomeTaxesPaidNet	0us-gaap_IncomeTaxesPaidNet
Interest paid	1,837us-gaap_InterestPaidNet	0us-gaap_InterestPaidNet	0us-gaap_InterestPaidNet
Contribution of net assets from affiliate	60,870	146,513	0
Contribution of common units to Western	40,000	0	0
Equity of Predecessor retained by affiliate	(2,502)wnr_NetAssetsNotAssumedbySubsidiary	(34,829)wnr_NetAssetsNotAssumedbySubsidiary	0wnr_NetAssetsNotAssumedbySubsidiary
Underwriting discounts and commissions	0	(22,612)	0
Accrued capital expenditures	$ 1,363	$ (341)	$ 1,036

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The cash inflow from the capital received in cash from a partner in a partnership during the period.

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The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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Net Assets Not Assumed from Parent by Subsidiary after the closing of initial public offering.

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