Murphy USA (MUSA) 10-Q 5 May 15 2015 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Mar. 31, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	Murphy USA Inc.
Trading Symbol	MUSA
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Entity Central Index Key	1573516
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Common Stock, Shares Outstanding	45,262,534

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets
Cash and cash equivalents	$287,671	$328,105	$369,424	$294,741
Accounts receivable-trade, less allowance for doubtful accounts of $4,456 in 2015 and $4,456 in 2014	165,257	140,091
Inventories, at lower of cost or market	184,972	182,914
Prepaid expenses and other current assets	10,620	14,772
Total current assets	648,520	665,882
Property, plant and equipment, at cost less accumulated depreciation and amortization of $746,804 in 2015 and $730,202 in 2014	1,263,740	1,253,124
Other assets	11,007	11,058
Total assets	1,923,267	1,930,064
Current liabilities
Current maturities of long-term debt	77
Trade accounts payable and accrued liabilities	411,903	386,999
Income taxes payable	5,912	25,600
Deferred income taxes	10,526	481
Total current liabilities	428,418	413,080
Long-term debt, including capitalized lease obligations	488,811	488,250
Deferred income taxes	113,488	118,609
Asset retirement obligations	22,702	22,245
Deferred credits and other liabilities	28,650	29,175
Total liabilities	1,082,069	1,071,359
Stockholders' Equity
Preferred Stock, par $0.01, (authorized 20,000,000 shares, none outstanding)
Common Stock, par $0.01, (authorized 200,000,000 shares, 46,767,164 and 46,767,164 shares issed at 2015 and 2014, respectively)	468	468
Treasury stock (1,504,630 and 1,056,689 shares held at March 31, 2015 and December 31, 2014, respectively)	-85,015	-51,073
Additional paid in capital (APIC)	551,374	557,871
Retained earnings	374,371	351,439
Total stockholders' equity	841,198	858,705	668,180	656,336
Total liabilities and stockholders' equity	$1,923,267	$1,930,064

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Consolidated Balance Sheets [Abstract]
Accounts receivable - trade, allowance for doubtful accounts	$4,456	$4,456
Property, plant and equipment, accumulated depreciation and amortization	$746,804	$730,202
Preferred stock par value	$0.01	$0.01
Preferred stock shares authorized	20,000,000	20,000,000
Preferred stock shares outstanding	0	0
Common stock par value	$0.01	$0.01
Common stock shares authorized	200,000,000	200,000,000
Common stock shares issued	46,767,164	46,767,164
Treasury stock, shares	1,504,630	1,056,689

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Revenues
Petroleum product sales	$2,358,079	[1]	$3,594,347	[1]
Merchandise sales	524,137		502,722
Ethanol sales and other	80,299		67,265
Total revenues	2,962,515		4,164,334
Costs and operating expenses
Petroleum product cost of goods sold	2,261,086	[1]	3,500,346	[1]
Merchandise cost of goods sold	450,553		432,462
Ethanol cost of goods sold	34,580		37,770
Station and other operating expenses	122,175		122,477
Depreciation and amortization	21,178		19,661
Selling, general and administrative	31,456		28,071
Accretion of asset retirement obligations	378		297
Total costs and operating expenses	2,921,406		4,141,084
Income from operations	41,109		23,250
Other income (expense)
Interest income	1,873		15
Interest expense	-8,329		-9,095
Gain (loss) on sale of assets	4		170
Other nonoperating income	5,364		112
Total other income (expense)	-1,088		-8,798
Income before income taxes	40,021		14,452
Income tax expense	17,089		5,600
Income from continuing operations	22,932		8,852
Income from discontinued operations, net of taxes			781
Net Income	$22,932		$9,633
Earnings per share - basic:
Income from continuing operations	$0.50		$0.19
Income from discontinued operations			$0.02
Net Income - basic	$0.50		$0.21
Earnings per share - diluted:
Income from continuing operations	$0.50		$0.19
Income from discontinued operations			$0.02
Net Income - diluted	$0.50		$0.21
Weighted-average shares outstanding (in thousands):
Basic	45,633		46,750
Diluted	46,036		46,884
[1]	Includes excise taxes of: $462,974 $445,404

Consolidated_Statements_of_Inc1

Consolidated Statements of Income (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Consolidated Statements of Income [Abstract]
Excise taxes	$462,974	$445,404

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating Activities
Net income	$22,932	$9,633
Adjustments to reconcile net income to net cash provided by operating activities
Income from discontinued operations, net of taxes		-781
Depreciation and amortization	21,178	19,661
Amortization of deferred major repair costs	347	169
Deferred and noncurrent income tax credits	-5,121	-4,556
Accretion on discounted liabilities	378	297
Pretax gains from sale of assets	-4	-170
Net (increase) decrease in noncash operating working capital	-7,811	84,752
Other operating activities - net	2,519	3,698
Net cash provided by continuing operations	34,418	112,703
Net cash provided by discontinued operations		134
Net cash provided by operating activities	34,418	112,837
Investing Activities
Property additions	-32,215	-23,739
Proceeds from sale of assets	82	279
Expenditures for major repairs	-362	-728
Investing activities of discontinued operations
Sales proceeds		1,097
Net cash required by investing activities	-32,495	-23,091
Financing Activities
Purchase of treasury stock	-39,435
Repayments of long-term debt	-15	-15,000
Debt issuance costs		-63
Amounts related to share-based compensation	-2,907
Net cash required by financing activities	-42,357	-15,063
Net increase (decrease) in cash and cash equivalents	-40,434	74,683
Cash and cash equivalents at January 1	328,105	294,741
Cash and cash equivalents at March 31	$287,671	$369,424

Consolidated_Statements_Of_Cha

Consolidated Statements Of Changes In Equity (USD $)	Common Stock [Member]	Treasury Stock [Member]	APIC [Member]	Retained Earnings [Member]	Total
In Thousands, except Share data
Balance at Dec. 31, 2013	$467		$548,293	$107,576	$656,336
Balance, shares at Dec. 31, 2013	46,743,633
Net income				9,633	9,633
Issuance of common stock	1		-312		-311
Issuance of common stock, shares	12,557
Share-based compensation expense			2,522		2,522
Balance at Mar. 31, 2014	468		550,503	117,209	668,180
Balance, shares at Mar. 31, 2014	46,756,190
Balance at Dec. 31, 2014	468	-51,073	557,871	351,439	858,705
Balance, shares at Dec. 31, 2014	46,767,164				46,767,164
Net income				22,932	22,932
Purchase of treasury stock		-39,435			-39,435
Issuance of treasury stock		5,493	-5,493
Amounts related to share-based compensation			-2,907		-2,907
Share-based compensation expense			1,903		1,903
Balance at Mar. 31, 2015	$468	($85,015)	$551,374	$374,371	$841,198
Balance, shares at Mar. 31, 2015	46,767,164				46,767,164

Description_Of_Business_And_Ba

Description Of Business And Basis Of Presentation	3 Months Ended
	Mar. 31, 2015
Description Of Business And Basis Of Presentation [Abstract]
Description Of Business And Basis Of Presentation	Note 1 — Description of Business and Basis of Presentation
	Description of business — Murphy USA Inc. (“Murphy USA” or the “Company”) markets refined products through a network of retail gasoline stations and to unbranded wholesale customers. Murphy USA’s owned retail stations are almost all located in close proximity to Walmart stores in 23 states and use the brand name Murphy USA®. Murphy USA also markets gasoline and other products at standalone stations under the Murphy Express brand. At March 31, 2015, Murphy USA had a total of 1,268 Company stations. The Company acquired a partially constructed ethanol production facility in Hereford, Texas, in late 2010. The Hereford facility is designed to produce 105 million gallons of corn-based ethanol per year, and it began operations near the end of the first quarter of 2011.
	Basis of Presentation — Murphy USA was incorporated in March 2013 and, in connection with its incorporation, Murphy USA issued 100 shares of common stock, par value $0.01 per share, to Murphy Oil Corporation (“Murphy Oil” or “Parent”) for $1.00. On August 30, 2013, Murphy USA was separated from Murphy Oil through the distribution of 100% of the common stock of Murphy USA to holders of Murphy Oil stock.
	In preparing the financial statements of Murphy USA in conformity with accounting principles generally accepted in the United States, management has made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues, expenses and the disclosure of contingent assets and liabilities. Actual results may differ from these estimates.
	Interim Financial Information — The interim period financial information presented in these consolidated financial statements is unaudited and includes all known accruals and adjustments, in the opinion of management, necessary for a fair presentation of the consolidated financial position of Murphy USA and its results of operations and cash flows for the periods presented. All such adjustments are of a normal and recurring nature.
	These interim consolidated financial statements should be read together with our audited financial statements for the years ended December 31, 2014, 2013 and 2012, included in our Annual Report on Form 10-K (File No. 001-35914), as filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934 on February 27, 2015.
	Recently Issued Accounting Standards— In April 2015, the FASB issued ASU No. 2015-03, “Simplifying the Presentation of Debt Issuance Costs,” which changes the presentation of debt issuance costs to more closely align with the presentation of debt discounts or premiums.  The debt issuance costs will continue to be amortized in the same way as before but presentation will reduce net debt at each financial statement date. The new standard is effective for all fiscal years beginning after December 15, 2015 and interim periods with those fiscal years.  Early adoption of this standard is permitted and the Company has elected to adopt this standard with the issuance of these financial statements.  See Note 4 for additional disclosures required by the adoption of this change in accounting principle.

RelatedParty_Transactions

Related-Party Transactions	3 Months Ended
	Mar. 31, 2015
Related-Party Transactions [Abstract]
Related-Party Transactions
	Note 2 — Related Party Transactions
	Transition Services Agreement
	In conjunction with the separation, we entered into a Transition Services Agreement (“Agreement”) with Murphy Oil on August 30, 2013.  This Agreement sets forth the terms on which Murphy Oil provides to us, and we provide to Murphy Oil, on a temporary basis, certain services or functions that the companies have historically shared.  Transition services include administrative, payroll, human resources, information technology and network transition services, tax, treasury and other support and corporate services.  The Agreement provides for the provision of specified transition services generally for a period of up to eighteen months, with a possible extension of six months, on a cost basis. Certain areas of the Agreement have been extended for the six month period.  We record the fee Murphy Oil charges us for these services as a component of general and administrative expenses.

Discontinued_Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2015
Discontinued Operations [Abstract]
Discontinued Operations	Note 3 – Discontinued Operations
	In November 2013, the Company announced that it had entered into negotiations to sell its Hankinson, North Dakota ethanol production facility as part of management’s strategic plan to exit non-core businesses. On December 19, 2013, the Company sold its wholly-owned subsidiary Hankinson Renewable Energy, LLC which owned and operated an ethanol manufacturing facility in Hankinson, North Dakota, and its related assets for $170,000,000 plus working capital adjustments of approximately $3,118,000. During January 2014, the final adjustments to working capital were made and the Company received an additional $1.1 million in sales proceeds which has been included in discontinued operations for the first quarter of 2014.  The Company has accounted for all operations related to Hankinson Renewable, LLC as discontinued operations for all periods presented. The after-tax gain from disposal of the subsidiary (including associated inventories) was $52,542,000 in 2013 with an additional $781,000 in 2014 related to the final working capital adjustment.
	The results of operations associated with the Hankinson discontinued operations for the 2014 period are presented in the following table.
	(Thousands of dollars)	Three Months Ended March 31, 2014
	Revenues	$	—
	Income from operations before income taxes		—
	Gain on sale before income taxes		1,202
	Total income from discontinued operations before taxes		1,202
	Provision for income taxes		421
	Income from discontinued operations	$	781

Change_In_Accounting_Principle

Change In Accounting Principle	3 Months Ended
	Mar. 31, 2015
Change In Accounting Principle [Abstract]
Change In Accounting Principle
	Note 4 – Change in Accounting Principle
	During the first quarter of 2015, the Company elected to early adopt the provisions of ASU 2015-03 “Simplifying the Presentation of Debt Issuance Costs”.  In accordance with provisions of the FASB ASU topic on “Accounting Changes and Error Corrections” all prior periods presented have been retrospectively adjusted to apply the change in accounting principle.  For a summary of the adjustments, see below:
		Previous Accounting Method		Effect of Change In	As Reported
	(thousands of dollars)	31-Mar-15		Accounting Principle	31-Mar-15
	Other assets	$	15,023	-4,016	11,007
	Long-term debt	$	492,827	-4,016	488,811
		As Originally Reported		Effect of Change In	As Currently Reported
		31-Dec-14		Accounting Principle	31-Dec-14
	Other assets	$	15,251	-4,193	11,058
	Long-term debt	$	492,443	-4,193	488,250

Inventories

Inventories	3 Months Ended
	Mar. 31, 2015
Inventories [Abstract]
Inventories
	Note 5 — Inventories
	Inventories consisted of the following:
		March 31,		December 31,
	(Thousands of dollars)	2015		2014
	Finished products - FIFO basis	$	236,765	$	205,213
	Less LIFO reserve - finished products		-164,493		-144,283
	Finished products - LIFO basis		72,272		60,930
	Store merchandise for resale		96,924		98,712
	Corn based products		10,394		17,873
	Materials and supplies		5,382		5,399
	Total inventories	$	184,972	$	182,914
	At March 31, 2015 and December 31, 2014, the replacement cost (market value) of last-in, first-out (LIFO) inventories exceeded the LIFO carrying value by $164,493,000 and $144,283,000, respectively. Corn based products consisted primarily of corn and wet distillers’ grains with solubles (WDGS), and were all valued on a first-in, first-out (FIFO) basis.
	In the first quarter of 2014, the Company recognized a benefit of $17,781,000 related to a LIFO decrement that existed at that date that was not expected to be restored at year-end.

LongTerm_Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2015
Long-Term Debt [Abstract]
Long-Term Debt
	Note 6 — Long-Term Debt
	Long-term debt consisted of the following:
		March 31,		December 31,
	(Thousands of dollars)	2015		2014
	6% senior notes due 2023 (net of unamortized discount of $7,341 at March 2015 and $7,557 at December 2014)	$	492,659	$	492,443
	Less unamortized debt issuance costs		-4,016		-4,193
	Total notes payable, net		488,643		488,250
	Capitalized lease obligations, vehicles, due through 2018		245		—
	Less current maturities		-77		—
	Total long-term debt	$	488,811	$	488,250
	Senior Notes
	On August 14, 2013, Murphy Oil USA, Inc., our primary operating subsidiary, issued 6.00% Senior Notes due 2023 (the “Senior Notes”) in an aggregate principal amount of $500 million. The Senior Notes are fully and unconditionally guaranteed by Murphy USA, and are guaranteed by certain 100% owned subsidiaries that guarantee our credit facilities. The indenture governing the Senior Notes contains restrictive covenants that limit, among other things, the ability of Murphy USA, Murphy Oil USA, Inc. and the restricted subsidiaries to incur additional indebtedness or liens, dispose of assets, make certain restricted payments or investments, enter into transactions with affiliates or merge with or into other entities.
	The Senior Notes and the guarantees rank equally with all of our and the guarantors’ existing and future senior unsecured indebtedness and effectively junior to our and the guarantors’ existing and future secured indebtedness (including indebtedness with respect to the credit facilities) to the extent of the value of the assets securing such indebtedness.  The Senior Notes are structurally subordinated to all of the existing and future third-party liabilities, including trade payables, of our existing and future subsidiaries that do not guarantee the notes.
	We used the net proceeds of the Senior Notes, together with borrowings under the credit facilities, to finance a cash dividend of $650 million from Murphy Oil USA, Inc. to Murphy Oil paid in connection with the separation.
	On June 17, 2014, we closed an exchange offer for our Senior Notes to make them eligible for public resale, as required by a registration rights agreement entered into in connection with the issuance of the Senior Notes.  All of the Senior Notes were tendered for exchange.
	Credit Facilities
	On August 30, 2013, we entered into a credit agreement in connection with the separation from Murphy Oil. The credit agreement provides for a committed $450 million asset-based loan (ABL) facility (with availability subject to the borrowing base described below) and provided for a $150 million term facility. It also provides for a $200 million uncommitted incremental facility. On August 30, 2013, Murphy Oil USA, Inc. borrowed $150 million under the term facility, the proceeds of which were used, together with the net proceeds of the offering of the Senior Notes, to finance a  $650 million cash dividend from Murphy Oil USA, Inc. to Murphy Oil. The term facility was repaid in full in May 2014.  On September 2, 2014, we amended the credit agreement to extend the maturity date to September 2, 2019 and amend the terms of various covenants.
	The borrowing base is expected, at any time of determination, to be an amount (net of reserves) equal to the sum of:
	•      100% of eligible cash at such time, plus
	•      90% of eligible credit card receivables at such time, plus
	•      90% of eligible investment grade accounts, plus
	•      85% of eligible other accounts, plus
	•      80% of eligible product supply/wholesale refined products inventory at such time, plus
	•      75% of eligible retail refined products inventory at such time, plus
	the lesser of (i) 70% of the average cost of eligible retail merchandise inventory at such time and (ii) 85% of the net orderly liquidation value of eligible retail merchandise inventory at such time.
	The ABL facility includes a $75 million sublimit on swingline loans and a $200 million sublimit for the issuance of letters of credit. Swingline loans and letters of credit issued under the ABL facility reduce availability under the ABL facility.
	Interest payable on the credit facilities is based on either:
	•    the London interbank offered rate, adjusted for statutory reserve requirements (the “Adjusted LIBO Rate”); or
	•the Alternate Base Rate, which is defined as the highest of (a) the prime rate, (b) the federal funds effective rate from time to time plus 0.50% per annum and (c) the one-month Adjusted LIBO Rate plus 1.00% per annum,
	plus, (A) in the case of Adjusted LIBO Rate borrowings, (i) with respect to the ABL facility, spreads ranging from 1.50% to 2.00% per annum depending on the average availability under the ABL facility or (ii) with respect to the term facility, spreads ranging from 2.75% to 3.00% per annum depending on a secured debt to EBITDA ratio and (B) in the case of Alternate Base Rate borrowings, (i) with respect to the ABL facility, spreads ranging from 0.50% to 1.00% per annum depending on the average availability under the ABL facility or (ii) with respect to the term facility, spreads ranging from 1.75% to 2.00% per annum depending on a secured debt to EBITDA ratio.
	The interest rate period with respect to the Adjusted LIBO Rate interest rate option can be set at one,  two,  three, or six months as selected by us in accordance with the terms of the credit agreement.
	We were obligated to make quarterly principal payments on the outstanding principal amount of the term facility beginning on the first anniversary of the effective date of the credit agreement in amounts equal to 10% of the term loans made on such effective date, with the remaining balance payable on the scheduled maturity date of the term facility. Borrowings under the credit facilities are prepayable at our option without premium or penalty. We were also required to prepay the term facility with the net cash proceeds of certain asset sales or casualty events, subject to certain exceptions. The credit agreement also includes certain customary mandatory prepayment provisions with respect to the ABL facility.
	The credit agreement contains certain covenants that limit, among other things, the ability of us and our subsidiaries to incur additional indebtedness or liens, to make certain investments, to enter into sale-leaseback transactions, to make certain restricted payments, to enter into consolidations, mergers or sales of material assets and other fundamental changes, to transact with affiliates, to enter into agreements restricting the ability of subsidiaries to incur liens or pay dividends, or to make certain accounting changes. In addition, the credit agreement requires us to maintain a fixed charge coverage ratio of a minimum of 1.0 to 1.0 when availability for at least three consecutive business days is less than the greater of (a) 17.5% of the lesser of the aggregate ABL facility commitments and the borrowing base and (b) $70,000,000 (including as of the most recent fiscal quarter end on the first date when availability is less than such amount).  As of March 31, 2015, our fixed charge coverage ratio was 1.17.
	After giving effect to the applicable restrictions on certain payments, which could include dividends under the credit agreement (which restrictions are only applicable when availability under the credit agreement does not exceed the greater of 25% of the lesser of the revolving commitments and the borrowing base and $100 million (and if availability under the credit agreement does not exceed the greater of 40% of the lesser of the revolving commitments and the borrowing base and $150 million, then our fixed charge coverage ratio must be at least 1.0 to 1.0) and the indenture, and subject to compliance with applicable law.  As of December 31, 2014, the Company had approximately $107.5 million of its net income and retained earnings free of such restrictions.
	All obligations under the credit agreement are guaranteed by Murphy USA and the subsidiary guarantors party thereto, and all obligations under the credit agreement, including the guarantees of those obligations, are secured by certain assets of Murphy USA, Murphy Oil USA, Inc. and the guarantors party thereto.

Asset_Retirement_Obligations_A

Asset Retirement Obligations (ARO)	3 Months Ended
	Mar. 31, 2015
Asset Retirement Obligations (ARO) [Abstract]
Asset Retirement Obligations (ARO)
	Note 7 — Asset Retirement Obligations (ARO)
	The majority of the ARO recognized by the Company at March 31, 2015 and December 31, 2014 related to the estimated costs to dismantle and abandon certain of its retail gasoline stations. The Company has not recorded an ARO for certain of its marketing assets because sufficient information is presently not available to estimate a range of potential settlement dates for the obligation. These assets are consistently being upgraded and are expected to be operational into the foreseeable future. In these cases, the obligation will be initially recognized in the period in which sufficient information exists to estimate the obligation.
	A reconciliation of the beginning and ending aggregate carrying amount of the ARO is shown in the following table.
		March 31,		December 31,
	(Thousands of dollars)	2015		2014
	Balance at beginning of period	$	22,245	$	17,130
	Accretion expense		378		1,200
	Liabilities incurred		79		3,915
	Balance at end of period	$	22,702	$	22,245
	The estimation of future ARO is based on a number of assumptions requiring professional judgment. The Company cannot predict the type of revisions to these assumptions that may be required in future periods due to the lack of availability of additional information.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Taxes [Abstract]
Income Taxes
	Note 8— Income Taxes
	The effective tax rate is calculated as the amount of income tax expense divided by income before income tax expense. For the three month periods ended March 31, 2015 and 2014, the Company’s effective tax rates were as follows:
		2015	2014
	Three months ended March 31	42.7%	38.7%
	The effective tax rate for the three months ended March 31, 2015 was higher than the U.S. Federal tax rate of 35% primarily due to certain discrete items that impacted income taxes in the period along with U.S. state tax expense.  The effective tax rate for the three months ended March 31, 2014 exceeded the U.S. Federal tax rate of 35% primarily due to U.S. state tax expense.
	The Company was included in Murphy Oil’s tax returns for the periods prior to the separation in multiple jurisdictions that remain subject to audit by taxing authorities. These audits often take years to complete and settle. As of March 31, 2015, the earliest year remaining open for Federal audit and/or settlement is 2010 and for the states it ranges from 2008-2011.  Although the Company believes that recorded liabilities for unsettled issues are adequate, additional gains or losses could occur in future periods from resolution of outstanding unsettled matters.

Incentive_Plans

Incentive Plans	3 Months Ended
	Mar. 31, 2015
Incentive Plans [Abstract]
Incentive Plans
	Note 9 — Incentive Plans
	2013 Long-Term Incentive Plan
	Effective August 30, 2013, certain of our employees participate in the Murphy USA 2013 Long-Term Incentive Plan which was subsequently amended and restated effective as of February 12, 2014 (the “MUSA 2013 Plan”). The MUSA 2013 Plan authorizes the Executive Compensation Committee of our Board of Directors (“the Committee”) to grant non-qualified or incentive stock options, stock appreciation rights, stock awards (including restricted stock and restricted stock unit awards), cash awards, and performance awards to our employees. No more than 5.5 million shares of MUSA common stock may be delivered under the MUSA 2013 Plan and no more than 1 million shares of common stock may be awarded to any one employee, subject to adjustment for changes in capitalization. The maximum cash amount payable pursuant to any “performance-based” award to any participant in any calendar year is $5 million.
	On February 10, 2015, the Committee granted nonqualified stock options for 72,350 shares at an exercise price of $70.57 per share under the terms of the MUSA 2013 Plan.  The Black-Scholes valuation for these awards is $20.18 per option.  The Committee also awarded time-based restricted stock units and performance-based restricted stock units (performance units) to certain employees on the same date.   There were 20,200 time-based restricted units granted at a grant date fair value of $70.57 along with 40,400 performance units.  Half of the performance units vest based on a 3-year return on average capital employed (ROACE) calculation and the other half vest based on a 3-year total shareholder return (TSR) calculation that compares MUSA to a group of 16 peer companies.  The portion of the awards that vest based on TSR qualify as a market condition and must be valued using a Monte Carlo valuation model.  For the TSR portion of the awards, the fair value was determined to be $100.33 per unit.  For the ROACE portion of the awards, the valuation will be based on the grant date fair value of $70.57 per unit and the number of awards will be periodically assessed to determine the probability of vesting.
	On February 11, 2015, the Committee also granted 35,250 time-based restricted stock units granted to certain employees with a grant date fair value of $70.57 per unit.
	2013 Stock Plan for Non-employee Directors
	Effective August 8, 2013, Murphy USA adopted the 2013 Murphy USA Stock Plan for Non-employee Directors (the “Directors Plan”).  The directors for Murphy USA are compensated with a mixture of cash payments and equity-based awards.  Awards under the Directors Plan may be in the form of restricted stock, restricted stock units, stock options, or a combination thereof.  An aggregate of 500,000 shares of common stock shall be available for issuance of grants under the Directors Plan.
	During the first quarter of 2015, the Company issued 12,924 restricted stock units to its non-employee directors at a weighted average grant date fair value of $71.51 per share.  These shares vest in three years from the grant date.
	For the three months ended March 31, 2015 and 2014, share based compensation was $1.9 million and $2.5 million, respectively.  The income tax benefit realized for the tax deductions from options exercised for the three months ended March 31, 2015 was $3.4 million.

Financial_Instruments_And_Risk

Financial Instruments And Risk Management

3 Months Ended

Mar. 31, 2015

Financial Instruments And Risk Management [Abstract]

Financial Instruments And Risk Management

Note 10— Financial Instruments and Risk Management

DERIVATIVE INSTRUMENTS — The Company makes limited use of derivative instruments to manage certain risks related to commodity prices. The use of derivative instruments for risk management is covered by operating policies and is closely monitored by the Company’s senior management. The Company does not hold any derivatives for speculative purposes and it does not use derivatives with leveraged or complex features. Derivative instruments are traded primarily with creditworthy major financial institutions or over national exchanges such as the New York Mercantile Exchange (“NYMEX”). To qualify for hedge accounting, the changes in the market value of a derivative instrument must historically have been, and would be expected to continue to be, highly effective at offsetting changes in the prices of the hedged item. To the extent that the change in fair value of a derivative instrument has less than perfect correlation with the change in the fair value of the hedged item, a portion of the change in fair value of the derivative instrument is considered ineffective and would normally be recorded in earnings during the affected period.

The Company is subject to commodity price risk related to corn that it will purchase in the future for feedstock and WDGS that it will sell in the future at its remaining ethanol production facility.   At March 31, 2015 and 2014, the Company had open physical delivery commitment contracts for purchase of approximately 8.8 million and 3.5 million bushels of corn, respectively, for processing at its ethanol plant. At March 31, 2015 and 2014, the Company had open physical delivery commitment contracts for sale of approximately 0.5 million and 0.5 million equivalent bushels, respectively, of WDGS. To manage the price risk associated with certain of these physical delivery commitments which have fixed prices, at March 31, 2015 and 2014, the Company had outstanding derivative contracts with a net short volume of 2.1 million and offsetting long and short volumes of 0.5 million bushels, respectively, that mature at future prices in effect on the expected date of delivery under the physical delivery commitment contracts.   Additionally, at March 31, 2015 and 2014, the Company had outstanding derivative contracts with net short volumes of 2.0 million and 1.9 million bushels of corn, respectively, to buy back when certain corn inventories are expected to be processed. The impact of marking to market these commodity derivative contracts increased income before taxes by $0.6 million and decreased income before taxes by $0.6 million for the three months ended March 31, 2015 and 2014, respectively.

At March 31, 2015 and December 31, 2014, the fair value of derivative instruments not designated as hedging instruments are presented in the following table.

31-Mar-15

31-Dec-14

(Thousands of dollars)

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Commodity derivative contracts

Accounts Receivable

$

673

Accounts Payable

$

113

Accounts Receivable

$

74

Accounts Payable

$

2,204

For the three month periods ended March 31, 2015 and 2014, the gains and losses recognized in the consolidated Statements of Income for derivative instruments not designated as hedging instruments are presented in the following table.

Gain (Loss)

(Thousands of dollars)

Statement of Income

Three Months Ended March 31,

Type of Derivative Contract

Location

2015

2014

Commodity

Fuel and ethanol costs of goods sold

$

2,197

$

-1,465

The Company offsets certain assets and liabilities related to derivative contracts when the legal right of offset exists. Derivative assets and liabilities which have offsetting positions at March 31, 2015 and December 31, 2014 are presented in the following tables:

Gross Amounts

Net Amounts of

Gross Amounts

Offset in the

Assets Presented in

of Recognized

Consolidated

the Consolidated

(Thousands of dollars)

Assets

Balance Sheet

Balance Sheet

At March 31, 2015

Commodity derivatives

$

694

$

-21

$

673

At December 31, 2014

Commodity derivatives

$

93

$

-19

$

74

Gross Amounts

Net Amounts of

Gross Amounts

Offset in the

Liabilities Presented

of Recognized

Consolidated

in the Consolidated

Liabilities

Balance Sheet

Balance Sheet

At March 31, 2015

Commodity derivatives

$

134

$

-21

$

113

At December 31, 2014

Commodity derivatives

$

2,223

$

-19

$

2,204

All commodity derivatives above are corn-based contracts associated with the Company’s Hereford plant. Net derivative assets are included in Accounts Receivable presented in the table on the prior page and are included in Accounts Receivable on the Consolidated Balance Sheets; likewise, net derivative liabilities in the above table are included in Accounts Payable in the table above and are included in Accounts Payable and Accrued Liabilities on the Consolidated Balance Sheets. These contracts permit net settlement and the Company generally avails itself of this right to settle net. At March 31, 2015 and December 31, 2014, cash deposits of $2.3 million and $2.8 million related to commodity derivative contracts were reported in Prepaid Expenses and Other Current Assets in the Consolidated Balance Sheets, respectively. These cash deposits have not been used to increase the reported net assets or reduce the reported net liabilities on the corn-based derivative contracts at March 31, 2015 or December 31, 2014, respectively.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share	Note 11 – Earnings Per Share
	Basic earnings per common share is computed by dividing net income available to common stockholders by the weighted average of common shares outstanding during the period.  Diluted earnings per common share adjusts basic earnings per common share for the effects of stock options and restricted stock in the periods where such items are dilutive.
	During May 2014, the Company executed a share repurchase program that was approved by the Board of Directors for approximately $50 million worth of common stock of the Company.   At the completion of this plan, the Company had acquired 1,040,636 shares of common stock for an average price of $48.07 per share including brokerage fees.  The Company is currently executing the previously announced share repurchase program of $250 million that is expected to be completed by the end of 2015.  As of March 31, 2015, 583,214 shares have been acquired under the $250 million repurchase authorization.
	The following table provides a reconciliation of basic and diluted earnings per share computations for the three months ended March 31, 2015 and 2014 (in thousands, except per share amounts):
		Three Months Ended March 31,
			2015		2014
	Earnings per common share:
	Net income attributable to common stockholders	$	22,932	$	9,633
	Weighted average common shares outstanding (in thousands)		45,633		46,750
	Total earnings per share	$	0.50	$	0.21
	Earnings per common share - assuming dilution:
	Net income attributable to common stockholders	$	22,932	$	9,633
	Weighted average common shares outstanding (in thousands)		45,633		46,750
	Common equivalent shares:
	Dilutive options		403		134
	Weighted average common shares outstanding - assuming dilution (in thousands)		46,036		46,884
	Earnings per share - assuming dilution	$	0.50	$	0.21

Other_Financial_Information

Other Financial Information	3 Months Ended
	Mar. 31, 2015
Other Financial Information [Abstract]
Other Financial Information	Note 12 — Other Financial Information
	ETHANOL SALES AND OTHER – Ethanol sales and other revenue in the Consolidated Income Statements include the following items:
		Three Months Ended March 31,
	(Thousands of dollars)	2015		2014
	Sales of ethanol and related plant products	$	41,748	$	48,789
	Renewable Identification Numbers (RINs) sales		37,599		17,593
	Other		952		883
	Total ethanol sales and other revenue	$	80,299	$	67,265
	CASH FLOW DISCLOSURES — Cash income taxes paid, net of refunds, were $27,598,000 and $50,100,000 for the three month periods ended March 31, 2015 and 2014, respectively. Interest paid was $15,444,000 and $16,250,000 for the three month periods ended March 31, 2015 and 2014, respectively.
		Three Months Ended March 31,
	(Thousands of dollars)	2015		2014
	Accounts receivable	$	-26,544	$	-19,160
	Inventories		-2,059		90,155
	Prepaid expenses		4,153		-253
	Accounts payable and accrued liabilities		26,281		53,990
	Income taxes payable		-19,687		-40,626
	Current deferred income tax liabilities		10,045		646
	Net decrease (increase) in noncash operating working capital	$	-7,811	$	84,752

Assets_And_Liabilities_Measure

Assets And Liabilities Measured At Fair Value	3 Months Ended
	Mar. 31, 2015
Assets And Liabilities Measured At Fair Value [Abstract]
Assets And Liabilities Measure At Fair Value	Note 13 — Assets and Liabilities Measured at Fair Value
	The Company carries certain assets and liabilities at fair value in its Consolidated Balance Sheets. The fair value hierarchy is based on the quality of inputs used to measure fair value, with Level 1 being the highest quality and Level 3 being the lowest quality. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included within Level 1. Level 3 inputs are unobservable inputs which reflect assumptions about pricing by market participants.
	The Company carries certain assets and liabilities at fair value in its Consolidated Balance Sheets. The fair value measurements for these assets and liabilities at March 31, 2015 and December 31, 2014 are presented in the following table.
		Fair Value Measurements
		at Reporting Date Using
				Quoted Prices		Significant
				In Active Markets		Other		Significant
		Fair Value		for Identical		Observable		Unobservable
		March 31,		Assets/(Liabilities)		Inputs		Inputs
	(Thousands of dollars)	2015		(Level 1)		(Level 2)		(Level 3)
	Assets
	Commodity derivative contracts	$	673		—	$	673		—
	Liabilities
	Commodity derivative contracts	$	-113		—	$	-113		—
		Fair Value Measurements
		at Reporting Date Using
				Quoted Prices		Significant
				In Active Markets		Other		Significant
		Fair Value		for Identical		Observable		Unobservable
		December 31,		Assets/(Liabilities)		Inputs		Inputs
	(Thousands of dollars)	2014		(Level 1)		(Level 2)		(Level 3)
	Assets
	Commodity derivative contracts	$	74		—	$	74		—
	Liabilities
	Commodity derivative contracts	$	-2,204		—	$	-2,204		—
	At the balance sheet date the fair value of commodity derivatives contracts for corn was determined based on market quotes for No. 2 yellow corn. The change in fair value of commodity derivatives is recorded in Fuel and ethanol cost of goods sold. The carrying value of the Company’s Cash and cash equivalents, Accounts receivable-trade and Trade accounts payable approximates fair value due to their short-term nature.
	The following table presents the carrying amounts and estimated fair values of financial instruments held by the Company at March 31, 2015 and December 31, 2014. The fair value of a financial instrument is the amount at which the instrument could be exchanged in a current transaction between willing parties. The table excludes Cash and cash equivalents, Accounts receivable-trade, Trade accounts payable and accrued liabilities, and capitalized lease obligations, all of which had fair values approximating carrying amounts. The fair value of Current and Long-term debt was estimated based on rates offered to the Company at that time for debt of the same maturities. The Company has off-balance sheet exposures relating to certain financial guarantees and letters of credit. The fair value of these, which represents fees associated with obtaining the instruments, was nominal.
		At March 31, 2015				At December 31, 2014
		Carrying				Carrying
	(Thousands of dollars)	Amount		Fair Value		Amount		Fair Value
	Financial liabilities
	Current and long-term debt	$	-492,659	$	-517,555	$	-492,443	$	-510,344

Contingencies

Contingencies	3 Months Ended
	Mar. 31, 2015
Contingencies [Abstract]
Contingencies
	Note 14 — Contingencies
	The Company’s operations and earnings have been and may be affected by various forms of governmental action. Examples of such governmental action include, but are by no means limited to: tax increases and retroactive tax claims; import and export controls; price controls; allocation of supplies of crude oil and petroleum products and other goods; laws and regulations intended for the promotion of safety and the protection and/or remediation of the environment; governmental support for other forms of energy; and laws and regulations affecting the Company’s relationships with employees, suppliers, customers, stockholders and others. Because governmental actions are often motivated by political considerations, may be taken without full consideration of their consequences, and may be taken in response to actions of other governments, it is not practical to attempt to predict the likelihood of such actions, the form the actions may take or the effect such actions may have on the Company.
	ENVIRONMENTAL MATTERS AND LEGAL MATTERS — Murphy USA is subject to numerous federal, state and local laws and regulations dealing with the environment. Violation of such environmental laws, regulations and permits can result in the imposition of significant civil and criminal penalties, injunctions and other sanctions. A discharge of hazardous substances into the environment could, to the extent such event is not insured, subject the Company to substantial expense, including both the cost to comply with applicable regulations and claims by neighboring landowners and other third parties for any personal injury, property damage and other losses that might result.
	The Company currently owns or leases, and has in the past owned or leased, properties at which hazardous substances have been or are being handled. Although the Company believes it has used operating and disposal practices that were standard in the industry at the time, hazardous substances may have been disposed of or released on or under the properties owned or leased by the Company or on or under other locations where they have been taken for disposal. In addition, many of these properties have been operated by third parties whose management of hazardous substances was not under the Company’s control. Under existing laws the Company could be required to remediate contaminated property (including contaminated groundwater) or to perform remedial actions to prevent future contamination. Certain of these contaminated properties are in various stages of negotiation, investigation, and/or cleanup, and the Company is investigating the extent of any related liability and the availability of applicable defenses. With the sale of the U.S. refineries in 2011, Murphy Oil retained certain liabilities related to environmental matters. Murphy Oil also obtained insurance covering certain levels of environmental exposures. The Company believes costs related to these sites will not have a material adverse effect on Murphy USA’s net income, financial condition or liquidity in a future period.
	Certain environmental expenditures are likely to be recovered by the Company from other sources, primarily environmental funds maintained by certain states. Since no assurance can be given that future recoveries from other sources will occur, the Company has not recorded a benefit for likely recoveries at March 31, 2015, however certain jurisdictions provide reimbursement for these expenses which have been considered in recording the net exposure.
	The U.S. Environmental Protection Agency (EPA) currently considers the Company a Potentially Responsible Party (PRP) at one Superfund site. The potential total cost to all parties to perform necessary remedial work at this site may be substantial. However, based on current negotiations and available information, the Company believes that it is a de minimis party as to ultimate responsibility at the Superfund site. Accordingly, the Company has not recorded a liability for remedial costs at the Superfund site at March 31, 2015. The Company could be required to bear a pro rata share of costs attributable to nonparticipating PRPs or could be assigned additional responsibility for remediation at this site or other Superfund sites. The Company believes that its share of the ultimate costs to clean-up this site will be immaterial and will not have a material adverse effect on its net income, financial condition or liquidity in a future period.
	Based on information currently available to the Company, the amount of future remediation costs to be incurred to address known contamination sites is not expected to have a material adverse effect on the Company’s future net income, cash flows or liquidity. However, there is the possibility that additional environmental expenditures could be required to address contamination, including as a result of discovering additional contamination or the imposition of new or revised requirements applicable to known contamination.
	In the case Freeny v. Murphy Oil Corporation and Murphy Oil USA, Inc. the plaintiffs allege that the Company has infringed on their electronic pricing system patent.  The Company’s claim is that our pricing system can be differentiated and in fact we have our own patent for our pricing system.  Murphy Oil USA, Inc. has agreed to defend and indemnify Murphy Oil Corporation in this matter as required by the terms of the Separation Agreement.  We are unable to estimate potential damages at this point and we are defending the claim vigorously.  Trial is currently set for June 2015.  At this time, management believes the probability of loss in this case is remote.  However, it is possible that an unfavorable outcome of this lawsuit or other contingency could have a material impact on the liquidity, results of operations, or financial condition of the Company in future periods.
	Other than as noted above, Murphy USA is engaged in a number of other legal proceedings, all of which the Company considers routine and incidental to its business. Based on information currently available to the Company, the ultimate resolution of those other legal matters is not expected to have a material adverse effect on the Company’s net income, financial condition or liquidity in a future period.
	INSURANCE — The Company maintains insurance coverage at levels that are customary and consistent with industry standards for companies of similar size. Murphy USA maintains statutory workers compensation insurance with a deductible of $0.5 million per occurrence and other insurance programs for general and auto liability. As of March 31, 2015, there were a number of outstanding claims that are of a routine nature. The estimated incurred but unpaid liabilities relating to these claims are included in Trade account payables and accrued liabilities on the Consolidated Balance Sheets. While the ultimate outcome of these claims cannot presently be determined, management believes that the accrued liability of $4.7 million will be sufficient to cover the related liability for all insurance claims and that the ultimate disposition of these claims will have no material effect on the Company’s financial position and results of operations.
	The Company has obtained insurance coverage as appropriate for the business in which it is engaged, but may incur losses that are not covered by insurance or reserves, in whole or in part, and such losses could adversely affect our results of operations and financial position.
	TAX MATTERS — Murphy USA is subject to extensive tax liabilities imposed by multiple jurisdictions, including income taxes, indirect taxes (excise/duty, sales/use and gross receipts taxes), payroll taxes, franchise taxes, withholding taxes and ad valorem taxes. New tax laws and regulations and changes in existing tax laws and regulations are continuously being enacted or proposed that could result in increased expenditures for tax liabilities in the future. Many of these liabilities are subject to periodic audits by the respective taxing authority. Subsequent changes to our tax liabilities because of these audits may subject us to interest and penalties.
	OTHER MATTERS — In the normal course of its business, the Company is required under certain contracts with various governmental authorities and others to provide financial guarantees or letters of credit that may be drawn upon if the Company fails to perform under those contracts. At March 31, 2015, the Company had contingent liabilities of $16.2 million on outstanding letters of credit. The Company has not accrued a liability in its balance sheet related to these financial guarantees and letters of credit because it is believed that the likelihood of having these drawn is remote.

Business_Segments

Business Segments	3 Months Ended
	Mar. 31, 2015
Business Segments [Abstract]
Business Segments
	Note 15 — Business Segments
	The Company has one operating segment which is Marketing.  This segment includes the bulk of the Company’s operating assets including retail marketing and product supply and wholesale operations.  The ethanol assets that remained after the disposition of Hankinson in 2013 were recast into the category with the prior Corporate assets and renamed “Corporate and other assets”.  In addition, due to the sale of the Hankinson entity, the Company also shows discontinued operations for the March 2014 year-to-date period for the prior Hankinson activity. Segment information is as follows:
				Three Months Ended
				31-Mar-15				31-Mar-14
		Total Assets at		External		Income		External		Income
	(Thousands of dollars)	March 31,		Revenues		(Loss)		Revenues		(Loss)
	Marketing	$	1,585,410	$	2,920,504	$	24,756	$	4,115,437	$	13,761
	Corporate and other assets		337,857		42,011		-1,824		48,897		-4,909
	Total operating segment		1,923,267		2,962,515		22,932		4,164,334		8,852
	Discontinued operations		—		—		—		—		781
	Total	$	1,923,267	$	2,962,515	$	22,932	$	4,164,334	$	9,633

Guarantor_Subsidiaries

Guarantor Subsidiaries	3 Months Ended
	Mar. 31, 2015
Guarantor Subsidiaries [Abstract]
Guarantor Subsidiaries
	Note 16 – Guarantor Subsidiaries
	Certain of the Company’s 100% owned, domestic subsidiaries (the “Guarantor Subsidiaries”) fully and unconditionally guarantee, on a joint and several basis, certain of the outstanding indebtedness of the Company, including the 6.00% senior notes due 2023.  The following consolidating and combining schedules present financial information on a consolidated basis in conformity with the SEC’s Regulation S-X Rule 3-10(d):
	CONSOLIDATING BALANCE SHEET
	(unaudited)
	(Thousands of dollars)	31-Mar-15
	Assets		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Current assets
	Cash and cash equivalents		$	—	$	286,430	$	—	$	1,241	$	—	$	287,671
	Accounts receivable—trade, less allowance for doubtful accounts of $4,456 in 2015			—		163,239		—		2,018		—		165,257
	Inventories, at lower of cost or market			—		166,720		—		18,252		—		184,972
	Prepaid expenses and other current assets			—		8,137		—		2,483		—		10,620
	Total current assets			—		624,526		—		23,994		—		648,520
	Property, plant and equipment, at cost less accumulated depreciation and amortization of $746,804 in 2015			—		1,258,179		—		5,561		—		1,263,740
	Investments in subsidiaries			1,603,209		176,677		—		—		-1,779,886		—
	Other assets			—		10,476		—		531		—		11,007
	Deferred tax assets			—		—		—		19,322		-19,322		—
	Total assets		$	1,603,209	$	2,069,858	$	—	$	49,408	$	-1,799,208	$	1,923,267
	Liabilities and Stockholders' Equity
	Current liabilities
	Current maturities of long-term debt		$	—	$	77	$	—	$	—	$	—	$	77
	Inter-company accounts payable			90,783		46,129		-52,078		-84,834		—		—
	Trade accounts payable and accrued liabilities			—		409,202		—		2,701		—		411,903
	Income taxes payable			—		-1,070		16		6,966		—		5,912
	Deferred income taxes			—		10,568		—		-42		—		10,526
	Total current liabilities			90,783		464,906		-52,062		-75,209		—		428,418
	Long-term debt, including capitalized lease obligations			—		488,811		—		—		—		488,811
	Deferred income taxes			—		132,810		—		—		-19,322		113,488
	Asset retirement obligations			—		22,702		—		—		—		22,702
	Deferred credits and other liabilities			—		28,650		—		—		—		28,650
	Total liabilities			90,783		1,137,879		-52,062		-75,209		-19,322		1,082,069
	Stockholders' Equity
	Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)			—		—		—		—		—		—
	Common Stock, par $0.01 (authorized 200,000,000 shares, 46,767,164 shares issued at March 31, 2015)			468		1		60		—		-61		468
	Treasury Stock (1,504,630 shares held  at March 31, 2015)			-85,015		—		—		—		—		-85,015
	Additional paid in capital (APIC)			1,222,602		557,607		52,004		35,677		-1,316,516		551,374
	Retained earnings			374,371		374,371		-2		88,940		-463,309		374,371
	Total stockholders' equity			1,512,426		931,979		52,062		124,617		-1,779,886		841,198
	Total liabilities and stockholders' equity		$	1,603,209	$	2,069,858	$	—	$	49,408	$	-1,799,208	$	1,923,267
	CONSOLIDATING BALANCE SHEET
	(Thousands of dollars)	31-Dec-14
	Assets		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Current assets
	Cash and cash equivalents		$	—	$	327,163	$	—	$	942	$	—	$	328,105
	Accounts receivable—trade, less allowance for doubtful accounts of $4,456 in 2014			—		138,466		—		1,625		—		140,091
	Inventories, at lower of cost or market			—		157,046		—		25,868		—		182,914
	Prepaid expenses and other current assets			—		11,710		—		3,062		—		14,772
	Total current assets			—		634,385		—		31,497		—		665,882
	Property, plant and equipment, at cost less accumulated depreciation and amortization of $730,202 in 2014			—		1,248,081		—		5,043		—		1,253,124
	Investments in subsidiaries			1,580,277		177,263		—		—		-1,757,540		—
	Other assets			—		10,543		—		515		—		11,058
	Deferred tax assets			—		—		—		19,273		-19,273		—
	Total assets		$	1,580,277	$	2,070,272	$	—	$	56,328	$	-1,776,813	$	1,930,064
	Liabilities and Stockholders' Equity
	Current liabilities
	Current maturities of long-term debt		$	—	$	—	$	—	$	—	$	—	$	—
	Inter-company accounts payable			51,348		82,528		-52,077		-81,799		—		—
	Trade accounts payable and accrued liabilities			—		381,271		—		5,728		—		386,999
	Income taxes payable			—		18,348		14		7,238		—		25,600
	Deferred income taxes			—		522		—		-41		—		481
	Total current liabilities			51,348		482,669		-52,063		-68,874		—		413,080
	Long-term debt, including capitalized lease obligations			—		488,250		—		—		—		488,250
	Deferred income taxes			—		137,882		—		—		-19,273		118,609
	Asset retirement obligations			—		22,245		—		—		—		22,245
Deferred credits and other liabilities			—		29,175		—		—		—		29,175
Total liabilities			51,348		1,160,221		-52,063		-68,874		-19,273		1,071,359
Stockholders' Equity
Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)			—		—		—		—		—		—
Common Stock, par $0.01 (authorized 200,000,000 shares, 46,767,164 shares issued  at December 31, 2014)			468		1		60		—		-61		468
Treasury Stock (1,056,689 shares held  at December 31, 2014)			-51,073		—		—		—		—		-51,073
Additional paid in capital (APIC)			1,228,095		558,611		52,004		35,677		-1,316,516		557,871
Retained earnings			351,439		351,439		-1		89,525		-440,963		351,439
Total stockholders' equity			1,528,929		910,051		52,063		125,202		-1,757,540		858,705
Total liabilities and stockholders' equity		$	1,580,277	$	2,070,272	$	—	$	56,328	$	-1,776,813	$	1,930,064
CONSOLIDATING INCOME STATEMENT
(unaudited)
(Thousands of dollars)	Three Months Ended March 31, 2015
Revenues		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Petroleum product sales		$	—	$	2,390,481	$	—	$	—	$	-32,402	$	2,358,079
Merchandise sales			—		524,137		—		—		—		524,137
Ethanol sales and other			—		38,548		—		41,751		—		80,299
Total revenues		$	—	$	2,953,166	$	—	$	41,751	$	-32,402	$	2,962,515
Costs and operating expenses
Petroleum product cost of goods sold			—		2,293,488		—		—		-32,402		2,261,086
Merchandise cost of goods sold			—		450,553		—		—		—		450,553
Ethanol cost of goods sold			—		—		—		34,580		—		34,580
Station and other operating expenses			—		114,535		—		7,640		—		122,175
Depreciation and amortization			—		21,103		—		75		—		21,178
Selling, general and administrative			—		31,092		1		363		—		31,456
Accretion of asset retirement obligations			—		378		—		—		—		378
Total costs and operating expenses			—		2,911,149		1		42,658		-32,402		2,921,406
Income (loss) from operations		$	—	$	42,017	$	-1	$	-907	$	—	$	41,109
Other income (expense)
Interest income			—		1,873		—		—		—		1,873
Interest expense			—		-8,329		—		—		—		-8,329
Gain on sale of assets			—		4		—		—		—		4
Other nonoperating income			—		5,364		—		—		—		5,364
Total other income (expense)		$	—	$	-1,088	$	—	$	—	$	—	$	-1,088
Income (loss) from continuing operations before income taxes			—		40,929		-1		-907		—		40,021
Income tax expense (benefit)			—		17,411		—		-322		—		17,089
Income (loss) from continuing operations			—		23,518		-1		-585		—		22,932
Income from discontinued operations, net of taxes			—		—		—		—		—		—
Equity earnings (deficit) in affiliates, net of tax			22,932		-586		—		—		-22,346		—
Net Income (Loss)		$	22,932	$	22,932	$	-1	$	-585	$	-22,346	$	22,932
CONSOLIDATING INCOME STATEMENT
(unaudited)
(Thousands of dollars)	Three Months Ended March 31, 2014
Revenues		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Petroleum product sales		$	—	$	3,634,271	$	—	$	—	$	-39,924	$	3,594,347
Merchandise sales			—		502,722		—		—		—		502,722
Ethanol sales and other			—		18,476		—		48,789		—		67,265
Total revenues		$	—	$	4,155,469	$	—	$	48,789	$	-39,924	$	4,164,334
Costs and operating expenses
Petroleum product cost of goods sold			—		3,540,270		—		—		-39,924		3,500,346
Merchandise cost of goods sold			—		432,462		—		—		—		432,462
Ethanol cost of goods sold			—		—		—		37,770		—		37,770
Station and other operating expenses			—		113,815		—		8,662		—		122,477
Depreciation and amortization			—		19,634		—		27		—		19,661
Selling, general and administrative			—		27,625		1		445		—		28,071
Accretion of asset retirement obligations			—		297		—		—		—		297
Total costs and operating expenses			—		4,134,103		1		46,904		-39,924		4,141,084
Income (loss) from operations		$	—	$	21,366	$	-1	$	1,885	$	—	$	23,250
Other income (expense)
Interest income			—		15		—		—		—		15
Interest expense			—		-9,095		—		—		—		-9,095
Gain on sale of assets			—		170		—		—		—		170
Other nonoperating income			—		112		—		—		—		112
Total other income (expense)		$	—	$	-8,798	$	—	$	—	$	—	$	-8,798
Income (loss) from continuing operations before income taxes			—		12,568		-1		1,885		—		14,452
Income tax expense			—		4,932		—		668		—		5,600
Income (loss) from continuing operations			—		7,636		-1		1,217		—		8,852
Income from discontinued operations, net of taxes			—		—		—		781		—		781
Equity earnings (deficit) in affiliates, net of tax			—		—		—		—		—		—
Net Income (Loss)		$	—	$	7,636	$	-1	$	1,998	$	—	$	9,633
CONSOLIDATING STATEMENT OF CASH FLOW
(unaudited)
(Thousands of dollars)	Three Months Ended March 31, 2015
Operating Activities		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Net income (loss)		$	22,932	$	22,932	$	-1	$	-585	$	-22,346	$	22,932
Adjustments to reconcile net income to net cash provided by operating activities
Income from discontinued operations, net of tax			—		—		—		—		—		—
Depreciation and amortization			—		21,103		—		75		—		21,178
Amortization of deferred major repair costs			—		—		—		347		—		347
Deferred and noncurrent income tax charges (credits)			—		-5,073		—		-48		—		-5,121
Accretion on discounted liabilities			—		378		—		—		—		378
Pretax gains from sale of assets			—		-4		—		—		—		-4
Net decrease (increase) in noncash operating working capital			—		-12,313		—		4,502		—		-7,811
Equity in earnings (deficit)			-22,932		586		—		—		22,346		—
Other operating activities - net			—		2,519		—		—		—		2,519
Net cash provided by (required by) continuing operations			—		30,128		-1		4,291		—		34,418
Net cash provided by discontinued operations			—		—		—		—		—		—
Net cash provided by (required by) operating activities			—		30,128		-1		4,291		—		34,418
Investing Activities
Property additions			—		-31,622		—		-593		—		-32,215
Proceeds from sale of assets			—		82		—		—		—		82
Expenditures for major repairs			—		—		—		-362		—		-362
Investing activities of discontinued operations
Sales proceeds			—		—		—		—		—		—
Net cash required by investing activities			—		-31,540		—		-955		—		-32,495
Financing Activities
Purchase of treasury stock			-39,435		—		—		—		—		-39,435
Repayments of long-term debt			—		-15		—		—		—		-15
Debt issuance costs			—		—		—		—		—		—
Amounts related to share-based compensation activities			—		-2,907		—		—		—		-2,907
Net distributions to parent			39,435		-36,399		1		-3,037		—		—
Net cash provided by (required by) financing activities			—		-39,321		1		-3,037		—		-42,357
Net increase (decrease) in cash and cash equivalents			—		-40,733		—		299		—		-40,434
Cash and cash equivalents at January 1			—		327,163		—		942		—		328,105
Cash and cash equivalents at March 31		$	—	$	286,430	$	—	$	1,241	$	—	$	287,671
CONSOLIDATING STATEMENT OF CASH FLOW
(unaudited)
(Thousands of dollars)	Three Months Ended March 31, 2014
Operating Activities		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Net income (loss)		$	—	$	7,636	$	-1	$	1,998	$	—	$	9,633
Adjustments to reconcile net income to net cash provided by operating activities
Income from discontinued operations, net of tax			—		—		—		-781		—		-781
Depreciation and amortization			—		19,634		—		27		—		19,661
Amortization of deferred major repair costs			—		—		—		169		—		169
Deferred and noncurrent income tax charges (credits)			—		-5,573		—		1,017		—		-4,556
Accretion on discounted liabilities			—		297		—		—		—		297
Pretax gains from sale of assets			—		-170		—		—		—		-170
Net decrease in noncash operating working capital			—		80,464		—		4,288		—		84,752
Equity in earnings			—		—		—		—		—		—
Other operating activities - net			—		3,698		—		—		—		3,698
Net cash provided by (required by) continuing operations			—		105,986		-1		6,718		—		112,703
Net cash provided by discontinued operations			—		—		—		134				134
Net cash provided by (required by) operating activities			—		105,986		-1		6,852		—		112,837
Investing Activities
Property additions			—		-23,501		—		-238		—		-23,739
Proceeds from sale of assets			—		279		—		—		—		279
Expenditures for major repairs			—		—		—		-728		—		-728
Investing activities of discontinued operations
Sales proceeds			—		—		—		1,097		—		1,097
Net cash provided by (required by) investing activities			—		-23,222		—		131		—		-23,091
Financing Activities
Purchase of treasury stock			—		—		—		—		—		—
Repayments of long-term debt			—		-15,000		—		—		—		-15,000
Debt issuance costs			—		-63		—		—		—		-63
Amounts related to share-based compensation activities			—		—		—		—		—		—
Net distributions to parent			—		6,187		1		-6,188		—		—
Net cash provided by (required by) financing activities			—		-8,876		1		-6,188		—		-15,063
Net increase in cash and cash equivalents			—		73,888		—		795		—		74,683
Cash and cash equivalents at January 1			—		294,741		—		—		—		294,741
Cash and cash equivalents at March 31		$	—	$	368,629	$	—	$	795	$	—	$	369,424
CONSOLIDATING STATEMENT OF CHANGES IN EQUITY
(unaudited)
(Thousands of dollars)		Three Months Ended March 31, 2015
Statement of Stockholders' Equity		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Common Stock
Balance as of December 31, 2014		$	468	$	1	$	60	$	—	$	-61	$	468
Issuance of common stock			—		—		—		—		—		—
Balance as of March 31, 2015		$	468	$	1	$	60	$	—	$	-61	$	468
Treasury Stock
Balance as of December 31, 2014		$	-51,073	$	—	$	—	$	—	$	—	$	-51,073
Issuance of common stock			5,493		—		—		—		—		5,493
Repurchase of common stock			-39,435		—		—		—		—		-39,435
Balance as of March 31, 2015		$	-85,015	$	—	$	—	$	—	$	—	$	-85,015
APIC
Balance as of December 31, 2014		$	1,228,095	$	558,611	$	52,004	$	35,677	$	-1,316,516	$	557,871
Issuance of common stock			-5,493		—		—		—		—		-5,493
Amounts related to share-based compensation			—		-2,907		—		—		—		-2,907
Share-based compensation expense			—		1,903		—		—		—		1,903
Balance as of March 31, 2015		$	1,222,602	$	557,607	$	52,004	$	35,677	$	-1,316,516	$	551,374
Retained Earnings
Balance as of December 31, 2014		$	351,439	$	351,439	$	-1	$	89,525	$	-440,963	$	351,439
Net income			22,932		22,932		-1		-585		-22,346		22,932
Balance as of March 31, 2015		$	374,371	$	374,371	$	-2	$	88,940	$	-463,309	$	374,371
CONSOLIDATING STATEMENT OF CHANGES IN EQUITY
(unaudited)
(Thousands of dollars)		Three Months Ended March 31, 2014
Statement of Stockholders' Equity		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Common Stock
Balance as of December 31, 2013		$	467	$	1	$	60	$	—	$	-61	$	467
Issuance of common stock			1		—		—		—		—		1
Balance as of March 31, 2014		$	468	$	1	$	60	$	—	$	-61	$	468
Treasury Stock
Balance as of December 31, 2013		$	—	$	—	$	—	$	—	$	—	$	—
Issuance of common stock			—		—		—		—		—		—
Repurchase of common stock			—		—		—		—		—		—
Balance as of March 31, 2014		$	—	$	—	$	—	$	—	$	—	$	—
APIC
Balance as of December 31, 2013		$	1,228,370	$	548,758	$	52,004	$	35,677	$	-1,316,516	$	548,293
Issuance of common stock			—		-312		—		—		—		-312
Amounts related to share-based compensation			—		—		—		—		—		—
Share-based compensation expense			—		2,522		—		—		—		2,522
Balance as of March 31, 2014		$	1,228,370	$	550,968	$	52,004	$	35,677	$	-1,316,516	$	550,503
Retained Earnings
Balance as of December 31, 2013		$	—	$	38,954	$	—	$	68,622	$	—	$	107,576
Net income			107,576		76,259		-1		1,998		-176,199		9,633
Balance as of March 31, 2014		$	107,576	$	115,213	$	-1	$	70,620	$	-176,199	$	117,209

Description_Of_Business_And_Ba1

Description Of Business And Basis Of Presentation (Policies)	3 Months Ended
	Mar. 31, 2015
Description Of Business And Basis Of Presentation [Abstract]
Basis Of Presentation	Basis of Presentation — Murphy USA was incorporated in March 2013 and, in connection with its incorporation, Murphy USA issued 100 shares of common stock, par value $0.01 per share, to Murphy Oil Corporation (“Murphy Oil” or “Parent”) for $1.00. On August 30, 2013, Murphy USA was separated from Murphy Oil through the distribution of 100% of the common stock of Murphy USA to holders of Murphy Oil stock.
	In preparing the financial statements of Murphy USA in conformity with accounting principles generally accepted in the United States, management has made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues, expenses and the disclosure of contingent assets and liabilities. Actual results may differ from these estimates.
Recently Issued Accounting Standards	Recently Issued Accounting Standards— In April 2015, the FASB issued ASU No. 2015-03, “Simplifying the Presentation of Debt Issuance Costs,” which changes the presentation of debt issuance costs to more closely align with the presentation of debt discounts or premiums.  The debt issuance costs will continue to be amortized in the same way as before but presentation will reduce net debt at each financial statement date. The new standard is effective for all fiscal years beginning after December 15, 2015 and interim periods with those fiscal years.  Early adoption of this standard is permitted and the Company has elected to adopt this standard with the issuance of these financial statements.  See Note 4 for additional disclosures required by the adoption of this change in accounting principle.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2015
Discontinued Operations [Abstract]
Summary Of Results Of Operations Of Discontinued Operations
	(Thousands of dollars)	Three Months Ended March 31, 2014
	Revenues	$	—
	Income from operations before income taxes		—
	Gain on sale before income taxes		1,202
	Total income from discontinued operations before taxes		1,202
	Provision for income taxes		421
	Income from discontinued operations	$	781

Change_In_Accounting_Principle1

Change In Accounting Principle (Tables)	3 Months Ended
	Mar. 31, 2015
Change In Accounting Principle [Abstract]
Summary Of Adjustments From Change In Accounting Principle
		Previous Accounting Method		Effect of Change In	As Reported
	(thousands of dollars)	31-Mar-15		Accounting Principle	31-Mar-15
	Other assets	$	15,023	-4,016	11,007
	Long-term debt	$	492,827	-4,016	488,811
		As Originally Reported		Effect of Change In	As Currently Reported
		31-Dec-14		Accounting Principle	31-Dec-14
	Other assets	$	15,251	-4,193	11,058
	Long-term debt	$	492,443	-4,193	488,250

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2015
Inventories [Abstract]
Summary Of Inventory
		March 31,		December 31,
	(Thousands of dollars)	2015		2014
	Finished products - FIFO basis	$	236,765	$	205,213
	Less LIFO reserve - finished products		-164,493		-144,283
	Finished products - LIFO basis		72,272		60,930
	Store merchandise for resale		96,924		98,712
	Corn based products		10,394		17,873
	Materials and supplies		5,382		5,399
	Total inventories	$	184,972	$	182,914

LongTerm_Debt_Tables

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Long-Term Debt [Abstract]
Summary Of Long-Term Debt
		March 31,		December 31,
	(Thousands of dollars)	2015		2014
	6% senior notes due 2023 (net of unamortized discount of $7,341 at March 2015 and $7,557 at December 2014)	$	492,659	$	492,443
	Less unamortized debt issuance costs		-4,016		-4,193
	Total notes payable, net		488,643		488,250
	Capitalized lease obligations, vehicles, due through 2018		245		—
	Less current maturities		-77		—
	Total long-term debt	$	488,811	$	488,250

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	3 Months Ended
	Mar. 31, 2015
Asset Retirement Obligations (ARO) [Abstract]
Reconciliation Of Beginning And Ending Aggregate Carrying Amount Of Asset Retirement Obligation
		March 31,		December 31,
	(Thousands of dollars)	2015		2014
	Balance at beginning of period	$	22,245	$	17,130
	Accretion expense		378		1,200
	Liabilities incurred		79		3,915
	Balance at end of period	$	22,702	$	22,245

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2015
Income Taxes [Abstract]
Summary Of Effective Income Tax Rates
		2015	2014
	Three months ended March 31	42.7%	38.7%

Financial_Instruments_And_Risk1

Financial Instruments And Risk Management (Tables)

3 Months Ended

Mar. 31, 2015

Financial Instruments And Risk Management [Abstract]

Fair Value Of Derivative Instruments Not Designated As Hedging Instruments

31-Mar-15

31-Dec-14

(Thousands of dollars)

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Commodity derivative contracts

Accounts Receivable

$

673

Accounts Payable

$

113

Accounts Receivable

$

74

Accounts Payable

$

2,204

Recognized Gains And Losses For Derivative Instruments Not Designated As Hedging Instruments

Gain (Loss)

(Thousands of dollars)

Statement of Income

Three Months Ended March 31,

Type of Derivative Contract

Location

2015

2014

Commodity

Fuel and ethanol costs of goods sold

$

2,197

$

-1,465

Summary Of Offsetting Assets

Gross Amounts

Net Amounts of

Gross Amounts

Offset in the

Assets Presented in

of Recognized

Consolidated

the Consolidated

(Thousands of dollars)

Assets

Balance Sheet

Balance Sheet

At March 31, 2015

Commodity derivatives

$

694

$

-21

$

673

At December 31, 2014

Commodity derivatives

$

93

$

-19

$

74

Summary Of Offsetting Liabilities

Gross Amounts

Net Amounts of

Gross Amounts

Offset in the

Liabilities Presented

of Recognized

Consolidated

in the Consolidated

Liabilities

Balance Sheet

Balance Sheet

At March 31, 2015

Commodity derivatives

$

134

$

-21

$

113

At December 31, 2014

Commodity derivatives

$

2,223

$

-19

$

2,204

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Reconciliation of Basic And Diluted Earnings Per Share Computations
		Three Months Ended March 31,
			2015		2014
	Earnings per common share:
	Net income attributable to common stockholders	$	22,932	$	9,633
	Weighted average common shares outstanding (in thousands)		45,633		46,750
	Total earnings per share	$	0.50	$	0.21
	Earnings per common share - assuming dilution:
	Net income attributable to common stockholders	$	22,932	$	9,633
	Weighted average common shares outstanding (in thousands)		45,633		46,750
	Common equivalent shares:
	Dilutive options		403		134
	Weighted average common shares outstanding - assuming dilution (in thousands)		46,036		46,884
	Earnings per share - assuming dilution	$	0.50	$	0.21

Other_Financial_Information_Ta

Other Financial Information (Tables)	3 Months Ended
	Mar. 31, 2015
Other Financial Information [Abstract]
Schedule Of Ethanol Sales And Other Revenue
		Three Months Ended March 31,
	(Thousands of dollars)	2015		2014
	Sales of ethanol and related plant products	$	41,748	$	48,789
	Renewable Identification Numbers (RINs) sales		37,599		17,593
	Other		952		883
	Total ethanol sales and other revenue	$	80,299	$	67,265
Summary Of Changes In Operating Working Capital
		Three Months Ended March 31,
	(Thousands of dollars)	2015		2014
	Accounts receivable	$	-26,544	$	-19,160
	Inventories		-2,059		90,155
	Prepaid expenses		4,153		-253
	Accounts payable and accrued liabilities		26,281		53,990
	Income taxes payable		-19,687		-40,626
	Current deferred income tax liabilities		10,045		646
	Net decrease (increase) in noncash operating working capital	$	-7,811	$	84,752

Assets_And_Liabilities_Measure1

Assets And Liabilities Measured At Fair Value (Tables)	3 Months Ended
	Mar. 31, 2015
Assets And Liabilities Measured At Fair Value [Abstract]
Schedule Of Fair Value Of Assets And Liabilities
		Fair Value Measurements
		at Reporting Date Using
				Quoted Prices		Significant
				In Active Markets		Other		Significant
		Fair Value		for Identical		Observable		Unobservable
		March 31,		Assets/(Liabilities)		Inputs		Inputs
	(Thousands of dollars)	2015		(Level 1)		(Level 2)		(Level 3)
	Assets
	Commodity derivative contracts	$	673		—	$	673		—
	Liabilities
	Commodity derivative contracts	$	-113		—	$	-113		—
		Fair Value Measurements
		at Reporting Date Using
				Quoted Prices		Significant
				In Active Markets		Other		Significant
		Fair Value		for Identical		Observable		Unobservable
		December 31,		Assets/(Liabilities)		Inputs		Inputs
	(Thousands of dollars)	2014		(Level 1)		(Level 2)		(Level 3)
	Assets
	Commodity derivative contracts	$	74		—	$	74		—
	Liabilities
	Commodity derivative contracts	$	-2,204		—	$	-2,204		—
Schedule Of Carrying Amounts And Estimated Fair Value Of Financial Instruments
		At March 31, 2015				At December 31, 2014
		Carrying				Carrying
	(Thousands of dollars)	Amount		Fair Value		Amount		Fair Value
	Financial liabilities
	Current and long-term debt	$	-492,659	$	-517,555	$	-492,443	$	-510,344

Business_Segments_Tables

Business Segments (Tables)	3 Months Ended
	Mar. 31, 2015
Business Segments [Abstract]
Summary Of Information By Business Segment
				Three Months Ended
				31-Mar-15				31-Mar-14
		Total Assets at		External		Income		External		Income
	(Thousands of dollars)	March 31,		Revenues		(Loss)		Revenues		(Loss)
	Marketing	$	1,585,410	$	2,920,504	$	24,756	$	4,115,437	$	13,761
	Corporate and other assets		337,857		42,011		-1,824		48,897		-4,909
	Total operating segment		1,923,267		2,962,515		22,932		4,164,334		8,852
	Discontinued operations		—		—		—		—		781
	Total	$	1,923,267	$	2,962,515	$	22,932	$	4,164,334	$	9,633

Guarantor_Subsidiaries_Tables

Guarantor Subsidiaries (Tables)	3 Months Ended
	Mar. 31, 2015
Guarantor Subsidiaries [Abstract]
Consolidating Balance Sheet
	CONSOLIDATING BALANCE SHEET
	(unaudited)
	(Thousands of dollars)	31-Mar-15
	Assets		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Current assets
	Cash and cash equivalents		$	—	$	286,430	$	—	$	1,241	$	—	$	287,671
	Accounts receivable—trade, less allowance for doubtful accounts of $4,456 in 2015			—		163,239		—		2,018		—		165,257
	Inventories, at lower of cost or market			—		166,720		—		18,252		—		184,972
	Prepaid expenses and other current assets			—		8,137		—		2,483		—		10,620
	Total current assets			—		624,526		—		23,994		—		648,520
	Property, plant and equipment, at cost less accumulated depreciation and amortization of $746,804 in 2015			—		1,258,179		—		5,561		—		1,263,740
	Investments in subsidiaries			1,603,209		176,677		—		—		-1,779,886		—
	Other assets			—		10,476		—		531		—		11,007
	Deferred tax assets			—		—		—		19,322		-19,322		—
	Total assets		$	1,603,209	$	2,069,858	$	—	$	49,408	$	-1,799,208	$	1,923,267
	Liabilities and Stockholders' Equity
	Current liabilities
	Current maturities of long-term debt		$	—	$	77	$	—	$	—	$	—	$	77
	Inter-company accounts payable			90,783		46,129		-52,078		-84,834		—		—
	Trade accounts payable and accrued liabilities			—		409,202		—		2,701		—		411,903
	Income taxes payable			—		-1,070		16		6,966		—		5,912
	Deferred income taxes			—		10,568		—		-42		—		10,526
	Total current liabilities			90,783		464,906		-52,062		-75,209		—		428,418
	Long-term debt, including capitalized lease obligations			—		488,811		—		—		—		488,811
	Deferred income taxes			—		132,810		—		—		-19,322		113,488
	Asset retirement obligations			—		22,702		—		—		—		22,702
	Deferred credits and other liabilities			—		28,650		—		—		—		28,650
	Total liabilities			90,783		1,137,879		-52,062		-75,209		-19,322		1,082,069
	Stockholders' Equity
	Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)			—		—		—		—		—		—
	Common Stock, par $0.01 (authorized 200,000,000 shares, 46,767,164 shares issued at March 31, 2015)			468		1		60		—		-61		468
	Treasury Stock (1,504,630 shares held  at March 31, 2015)			-85,015		—		—		—		—		-85,015
	Additional paid in capital (APIC)			1,222,602		557,607		52,004		35,677		-1,316,516		551,374
	Retained earnings			374,371		374,371		-2		88,940		-463,309		374,371
	Total stockholders' equity			1,512,426		931,979		52,062		124,617		-1,779,886		841,198
	Total liabilities and stockholders' equity		$	1,603,209	$	2,069,858	$	—	$	49,408	$	-1,799,208	$	1,923,267
	CONSOLIDATING BALANCE SHEET
	(Thousands of dollars)	31-Dec-14
	Assets		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Current assets
	Cash and cash equivalents		$	—	$	327,163	$	—	$	942	$	—	$	328,105
	Accounts receivable—trade, less allowance for doubtful accounts of $4,456 in 2014			—		138,466		—		1,625		—		140,091
	Inventories, at lower of cost or market			—		157,046		—		25,868		—		182,914
	Prepaid expenses and other current assets			—		11,710		—		3,062		—		14,772
	Total current assets			—		634,385		—		31,497		—		665,882
	Property, plant and equipment, at cost less accumulated depreciation and amortization of $730,202 in 2014			—		1,248,081		—		5,043		—		1,253,124
	Investments in subsidiaries			1,580,277		177,263		—		—		-1,757,540		—
	Other assets			—		10,543		—		515		—		11,058
	Deferred tax assets			—		—		—		19,273		-19,273		—
	Total assets		$	1,580,277	$	2,070,272	$	—	$	56,328	$	-1,776,813	$	1,930,064
	Liabilities and Stockholders' Equity
	Current liabilities
	Current maturities of long-term debt		$	—	$	—	$	—	$	—	$	—	$	—
	Inter-company accounts payable			51,348		82,528		-52,077		-81,799		—		—
	Trade accounts payable and accrued liabilities			—		381,271		—		5,728		—		386,999
	Income taxes payable			—		18,348		14		7,238		—		25,600
	Deferred income taxes			—		522		—		-41		—		481
	Total current liabilities			51,348		482,669		-52,063		-68,874		—		413,080
	Long-term debt, including capitalized lease obligations			—		488,250		—		—		—		488,250
	Deferred income taxes			—		137,882		—		—		-19,273		118,609
	Asset retirement obligations			—		22,245		—		—		—		22,245
	Deferred credits and other liabilities			—		29,175		—		—		—		29,175
	Total liabilities			51,348		1,160,221		-52,063		-68,874		-19,273		1,071,359
Stockholders' Equity
Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding)			—		—		—		—		—		—
Common Stock, par $0.01 (authorized 200,000,000 shares, 46,767,164 shares issued  at December 31, 2014)			468		1		60		—		-61		468
Treasury Stock (1,056,689 shares held  at December 31, 2014)			-51,073		—		—		—		—		-51,073
Additional paid in capital (APIC)			1,228,095		558,611		52,004		35,677		-1,316,516		557,871
Retained earnings			351,439		351,439		-1		89,525		-440,963		351,439
Total stockholders' equity			1,528,929		910,051		52,063		125,202		-1,757,540		858,705
Total liabilities and stockholders' equity		$	1,580,277	$	2,070,272	$	—	$	56,328	$	-1,776,813	$	1,930,064
Consolidating Income Statement
	CONSOLIDATING INCOME STATEMENT
	(unaudited)
	(Thousands of dollars)	Three Months Ended March 31, 2015
	Revenues		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Petroleum product sales		$	—	$	2,390,481	$	—	$	—	$	-32,402	$	2,358,079
	Merchandise sales			—		524,137		—		—		—		524,137
	Ethanol sales and other			—		38,548		—		41,751		—		80,299
	Total revenues		$	—	$	2,953,166	$	—	$	41,751	$	-32,402	$	2,962,515
	Costs and operating expenses
	Petroleum product cost of goods sold			—		2,293,488		—		—		-32,402		2,261,086
	Merchandise cost of goods sold			—		450,553		—		—		—		450,553
	Ethanol cost of goods sold			—		—		—		34,580		—		34,580
	Station and other operating expenses			—		114,535		—		7,640		—		122,175
	Depreciation and amortization			—		21,103		—		75		—		21,178
	Selling, general and administrative			—		31,092		1		363		—		31,456
	Accretion of asset retirement obligations			—		378		—		—		—		378
	Total costs and operating expenses			—		2,911,149		1		42,658		-32,402		2,921,406
	Income (loss) from operations		$	—	$	42,017	$	-1	$	-907	$	—	$	41,109
	Other income (expense)
	Interest income			—		1,873		—		—		—		1,873
	Interest expense			—		-8,329		—		—		—		-8,329
	Gain on sale of assets			—		4		—		—		—		4
	Other nonoperating income			—		5,364		—		—		—		5,364
	Total other income (expense)		$	—	$	-1,088	$	—	$	—	$	—	$	-1,088
	Income (loss) from continuing operations before income taxes			—		40,929		-1		-907		—		40,021
	Income tax expense (benefit)			—		17,411		—		-322		—		17,089
	Income (loss) from continuing operations			—		23,518		-1		-585		—		22,932
	Income from discontinued operations, net of taxes			—		—		—		—		—		—
	Equity earnings (deficit) in affiliates, net of tax			22,932		-586		—		—		-22,346		—
	Net Income (Loss)		$	22,932	$	22,932	$	-1	$	-585	$	-22,346	$	22,932
	CONSOLIDATING INCOME STATEMENT
	(unaudited)
	(Thousands of dollars)	Three Months Ended March 31, 2014
	Revenues		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Petroleum product sales		$	—	$	3,634,271	$	—	$	—	$	-39,924	$	3,594,347
	Merchandise sales			—		502,722		—		—		—		502,722
	Ethanol sales and other			—		18,476		—		48,789		—		67,265
	Total revenues		$	—	$	4,155,469	$	—	$	48,789	$	-39,924	$	4,164,334
	Costs and operating expenses
	Petroleum product cost of goods sold			—		3,540,270		—		—		-39,924		3,500,346
	Merchandise cost of goods sold			—		432,462		—		—		—		432,462
	Ethanol cost of goods sold			—		—		—		37,770		—		37,770
	Station and other operating expenses			—		113,815		—		8,662		—		122,477
	Depreciation and amortization			—		19,634		—		27		—		19,661
	Selling, general and administrative			—		27,625		1		445		—		28,071
	Accretion of asset retirement obligations			—		297		—		—		—		297
	Total costs and operating expenses			—		4,134,103		1		46,904		-39,924		4,141,084
	Income (loss) from operations		$	—	$	21,366	$	-1	$	1,885	$	—	$	23,250
	Other income (expense)
	Interest income			—		15		—		—		—		15
	Interest expense			—		-9,095		—		—		—		-9,095
	Gain on sale of assets			—		170		—		—		—		170
	Other nonoperating income			—		112		—		—		—		112
	Total other income (expense)		$	—	$	-8,798	$	—	$	—	$	—	$	-8,798
	Income (loss) from continuing operations before income taxes			—		12,568		-1		1,885		—		14,452
	Income tax expense			—		4,932		—		668		—		5,600
	Income (loss) from continuing operations			—		7,636		-1		1,217		—		8,852
	Income from discontinued operations, net of taxes			—		—		—		781		—		781
	Equity earnings (deficit) in affiliates, net of tax			—		—		—		—		—		—
	Net Income (Loss)		$	—	$	7,636	$	-1	$	1,998	$	—	$	9,633
Consolidating Statement Of Cash Flow	CONSOLIDATING STATEMENT OF CASH FLOW
	(unaudited)
	(Thousands of dollars)	Three Months Ended March 31, 2015
	Operating Activities		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Net income (loss)		$	22,932	$	22,932	$	-1	$	-585	$	-22,346	$	22,932
	Adjustments to reconcile net income to net cash provided by operating activities
	Income from discontinued operations, net of tax			—		—		—		—		—		—
	Depreciation and amortization			—		21,103		—		75		—		21,178
	Amortization of deferred major repair costs			—		—		—		347		—		347
	Deferred and noncurrent income tax charges (credits)			—		-5,073		—		-48		—		-5,121
	Accretion on discounted liabilities			—		378		—		—		—		378
	Pretax gains from sale of assets			—		-4		—		—		—		-4
	Net decrease (increase) in noncash operating working capital			—		-12,313		—		4,502		—		-7,811
	Equity in earnings (deficit)			-22,932		586		—		—		22,346		—
	Other operating activities - net			—		2,519		—		—		—		2,519
	Net cash provided by (required by) continuing operations			—		30,128		-1		4,291		—		34,418
	Net cash provided by discontinued operations			—		—		—		—		—		—
	Net cash provided by (required by) operating activities			—		30,128		-1		4,291		—		34,418
	Investing Activities
	Property additions			—		-31,622		—		-593		—		-32,215
	Proceeds from sale of assets			—		82		—		—		—		82
	Expenditures for major repairs			—		—		—		-362		—		-362
	Investing activities of discontinued operations
	Sales proceeds			—		—		—		—		—		—
	Net cash required by investing activities			—		-31,540		—		-955		—		-32,495
	Financing Activities
	Purchase of treasury stock			-39,435		—		—		—		—		-39,435
	Repayments of long-term debt			—		-15		—		—		—		-15
	Debt issuance costs			—		—		—		—		—		—
	Amounts related to share-based compensation activities			—		-2,907		—		—		—		-2,907
	Net distributions to parent			39,435		-36,399		1		-3,037		—		—
	Net cash provided by (required by) financing activities			—		-39,321		1		-3,037		—		-42,357
	Net increase (decrease) in cash and cash equivalents			—		-40,733		—		299		—		-40,434
	Cash and cash equivalents at January 1			—		327,163		—		942		—		328,105
	Cash and cash equivalents at March 31		$	—	$	286,430	$	—	$	1,241	$	—	$	287,671
	CONSOLIDATING STATEMENT OF CASH FLOW
	(unaudited)
	(Thousands of dollars)	Three Months Ended March 31, 2014
	Operating Activities		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Net income (loss)		$	—	$	7,636	$	-1	$	1,998	$	—	$	9,633
	Adjustments to reconcile net income to net cash provided by operating activities
	Income from discontinued operations, net of tax			—		—		—		-781		—		-781
	Depreciation and amortization			—		19,634		—		27		—		19,661
	Amortization of deferred major repair costs			—		—		—		169		—		169
	Deferred and noncurrent income tax charges (credits)			—		-5,573		—		1,017		—		-4,556
	Accretion on discounted liabilities			—		297		—		—		—		297
	Pretax gains from sale of assets			—		-170		—		—		—		-170
	Net decrease in noncash operating working capital			—		80,464		—		4,288		—		84,752
	Equity in earnings			—		—		—		—		—		—
	Other operating activities - net			—		3,698		—		—		—		3,698
	Net cash provided by (required by) continuing operations			—		105,986		-1		6,718		—		112,703
	Net cash provided by discontinued operations			—		—		—		134				134
	Net cash provided by (required by) operating activities			—		105,986		-1		6,852		—		112,837
	Investing Activities
	Property additions			—		-23,501		—		-238		—		-23,739
	Proceeds from sale of assets			—		279		—		—		—		279
	Expenditures for major repairs			—		—		—		-728		—		-728
	Investing activities of discontinued operations
	Sales proceeds			—		—		—		1,097		—		1,097
	Net cash provided by (required by) investing activities			—		-23,222		—		131		—		-23,091
	Financing Activities
	Purchase of treasury stock			—		—		—		—		—		—
	Repayments of long-term debt			—		-15,000		—		—		—		-15,000
	Debt issuance costs			—		-63		—		—		—		-63
Amounts related to share-based compensation activities			—		—		—		—		—		—
Net distributions to parent			—		6,187		1		-6,188		—		—
Net cash provided by (required by) financing activities			—		-8,876		1		-6,188		—		-15,063
Net increase in cash and cash equivalents			—		73,888		—		795		—		74,683
Cash and cash equivalents at January 1			—		294,741		—		—		—		294,741
Cash and cash equivalents at March 31		$	—	$	368,629	$	—	$	795	$	—	$	369,424
Consolidating Statement Of Changes In Equity	CONSOLIDATING STATEMENT OF CHANGES IN EQUITY
	(unaudited)
	(Thousands of dollars)		Three Months Ended March 31, 2015
	Statement of Stockholders' Equity		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Common Stock
	Balance as of December 31, 2014		$	468	$	1	$	60	$	—	$	-61	$	468
	Issuance of common stock			—		—		—		—		—		—
	Balance as of March 31, 2015		$	468	$	1	$	60	$	—	$	-61	$	468
	Treasury Stock
	Balance as of December 31, 2014		$	-51,073	$	—	$	—	$	—	$	—	$	-51,073
	Issuance of common stock			5,493		—		—		—		—		5,493
	Repurchase of common stock			-39,435		—		—		—		—		-39,435
	Balance as of March 31, 2015		$	-85,015	$	—	$	—	$	—	$	—	$	-85,015
	APIC
	Balance as of December 31, 2014		$	1,228,095	$	558,611	$	52,004	$	35,677	$	-1,316,516	$	557,871
	Issuance of common stock			-5,493		—		—		—		—		-5,493
	Amounts related to share-based compensation			—		-2,907		—		—		—		-2,907
	Share-based compensation expense			—		1,903		—		—		—		1,903
	Balance as of March 31, 2015		$	1,222,602	$	557,607	$	52,004	$	35,677	$	-1,316,516	$	551,374
	Retained Earnings
	Balance as of December 31, 2014		$	351,439	$	351,439	$	-1	$	89,525	$	-440,963	$	351,439
	Net income			22,932		22,932		-1		-585		-22,346		22,932
	Balance as of March 31, 2015		$	374,371	$	374,371	$	-2	$	88,940	$	-463,309	$	374,371
	CONSOLIDATING STATEMENT OF CHANGES IN EQUITY
	(unaudited)
	(Thousands of dollars)		Three Months Ended March 31, 2014
	Statement of Stockholders' Equity		Parent Company		Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations		Consolidated
	Common Stock
	Balance as of December 31, 2013		$	467	$	1	$	60	$	—	$	-61	$	467
	Issuance of common stock			1		—		—		—		—		1
	Balance as of March 31, 2014		$	468	$	1	$	60	$	—	$	-61	$	468
	Treasury Stock
	Balance as of December 31, 2013		$	—	$	—	$	—	$	—	$	—	$	—
	Issuance of common stock			—		—		—		—		—		—
	Repurchase of common stock			—		—		—		—		—		—
	Balance as of March 31, 2014		$	—	$	—	$	—	$	—	$	—	$	—
	APIC
	Balance as of December 31, 2013		$	1,228,370	$	548,758	$	52,004	$	35,677	$	-1,316,516	$	548,293
	Issuance of common stock			—		-312		—		—		—		-312
	Amounts related to share-based compensation			—		—		—		—		—		—
	Share-based compensation expense			—		2,522		—		—		—		2,522
	Balance as of March 31, 2014		$	1,228,370	$	550,968	$	52,004	$	35,677	$	-1,316,516	$	550,503
	Retained Earnings
	Balance as of December 31, 2013		$	—	$	38,954	$	—	$	68,622	$	—	$	107,576
	Net income			107,576		76,259		-1		1,998		-176,199		9,633
	Balance as of March 31, 2014		$	107,576	$	115,213	$	-1	$	70,620	$	-176,199	$	117,209

Description_Of_Business_And_Ba2

Description Of Business And Basis Of Presentation (Details) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended
	Aug. 30, 2013	Mar. 31, 2013	Mar. 31, 2015	Dec. 31, 2014
Description Of Business And Basis Of Presentation [Line Items]
Percentage of shares of stock distributed	100.00%
Number of states in which entity operates			23
Number of stations			1,268
Common stock shares issued		100
Common stock par value		$0.01	0.01	$0.01
Proceeds from issuance of common stock		$1
Texas [Member]
Description Of Business And Basis Of Presentation [Line Items]
Per annum production capacity of facility			105,000,000

RelatedParty_Transactions_Deta

Related-Party Transactions (Details)	3 Months Ended
	Mar. 31, 2015
Related-Party Transactions [Abstract]
Transition services agreement period	18 months
Transition services agreement extension period	6 months

Discontinued_Operations_Narrat

Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended	1 Months Ended		12 Months Ended
	Mar. 31, 2014	Jan. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales proceeds	$1,097,000
Hankinson Renewable Energy, LLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales proceeds			170,000,000
Working capital adjustments		1,100,000	3,118,000
After-tax gain (loss) from disposal of refineries				$781,000	$52,542,000

Discontinued_Operations_Summar

Discontinued Operations (Summary Of Results Of Operations Of Discontinued Operations) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations	$781
Hankinson Renewable Energy, LLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale before income taxes	1,202
Total income from discontinued operations before taxes	1,202
Provision for income taxes	421
Income from discontinued operations	$781

Change_In_Accounting_Principle2

Change In Accounting Principle (Summary Of Adjustments From Change In Accounting Principle) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	$11,007	$11,058
Long-term debt	488,811	488,250
Previous Accounting Method [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	15,023	15,251
Long-term debt	492,827	492,443
Effect Of Change In Accounting Principle [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	-4,016	-4,193
Long-term debt	($4,016)	($4,193)

Inventories_Narrative_Details

Inventories (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2014
Inventories [Abstract]
Excess of LIFO replacement cost over carrying value		$164,493,000	$144,283,000
Benefit related to LIFO decrement	$17,781,000

Inventories_Summary_Of_Invento

Inventories (Summary Of Inventory) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Inventories [Abstract]
Finished products - FIFO basis	$236,765	$205,213
Less LIFO reserve - finished products	-164,493	-144,283
Finished products - LIFO basis	72,272	60,930
Store merchandise for resale	96,924	98,712
Corn based products	10,394	17,873
Materials and supplies	5,382	5,399
Total inventories	$184,972	$182,914

LongTerm_Debt_Narrative_Detail

Long-Term Debt (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended
	Mar. 31, 2015	Dec. 31, 2013	Aug. 30, 2013	Dec. 31, 2014	Aug. 14, 2013
Debt Instrument [Line Items]
Senior notes	$492,659,000			$492,443,000	$500,000,000
Cash dividend to former parent		650,000,000
Fixed charge coverage ratio	117.00%
Fixed charge coverage ratio threshold, percentage of aggregate facility commitments and borrowing base	17.50%
Fixed charge coverage ratio threshold, amount of aggregate facility commitments and borrowing base	70,000,000
Net income and retained earnings free of restrictions				107,500,000
Dividend restrictions	After giving effect to the applicable restrictions on certain payments, which could include dividends under the credit agreement (which restrictions are only applicable when availability under the credit agreement does not exceed the greater of 25% of the lesser of the revolving commitments and the borrowing base and $100 million (and if availability under the credit agreement does not exceed the greater of 40% of the lesser of the revolving commitments and the borrowing base and $150 million, then our fixed charge coverage ratio must be at least 1.0 to 1.0) and the indenture, and subject to compliance with applicable law. As of December 31, 2014, the Company had approximately $107.5 million of its net income and retained earnings free of such restrictions.
Dividend restriction threshold as a percentage of revolving commitments and borrowing base	25.00%
Dividend restriction threshold as amount of availability	100,000,000
Dividend restriction threshold as a percentage of revolving commitments and borrowing base with consideration of fixed charge coverage ratio	40.00%
Dividend restriction threshold as amount of availability with consideration of fixed charge coverage ratio	150,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate					6.00%
Asset-Based Loan Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	450,000,000
Asset-Based Loan Facility, Third Amendment [Member]
Debt Instrument [Line Items]
Maturity date	2-Sep-19
Term Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	150,000,000
Proceeds borrowed from credit facility			150,000,000
Quarterly principal payment	10.00%
Incremental Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	200,000,000
Swing Line [Member]
Debt Instrument [Line Items]
Line of credit facility, sublimit	75,000,000
Letter Of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, sublimit	$200,000,000
Cash [Member]
Debt Instrument [Line Items]
Percentage of asset available to borrow against	100.00%
Credit Card Receivables [Member]
Debt Instrument [Line Items]
Percentage of asset available to borrow against	90.00%
Investment Grade Accounts [Member]
Debt Instrument [Line Items]
Percentage of asset available to borrow against	90.00%
Other Accounts [Member]
Debt Instrument [Line Items]
Percentage of asset available to borrow against	85.00%
Midstream Refined Products Inventory [Member]
Debt Instrument [Line Items]
Percentage of asset available to borrow against	80.00%
Refined Retail Products Inventory [Member]
Debt Instrument [Line Items]
Percentage of asset available to borrow against	75.00%
Retail Merchandise Inventory [Member]
Debt Instrument [Line Items]
Percentage of asset available to borrow against	70.00%
Percentage of net orderly liquidation value available to borrow against	85.00%
Federal Funds Rate [Member]
Debt Instrument [Line Items]
Spread over variable rate	0.50%
LIBO Rate [Member]
Debt Instrument [Line Items]
Spread over variable rate	1.00%
Minimum [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	100.00%
Period for fixed charge coverage ratio threshold	3 days
Dividend restrictions, minimum fixed charge coverage ratio	100.00%
Minimum [Member] | LIBO Rate [Member] | Asset-Based Loan Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	1.50%
Minimum [Member] | LIBO Rate [Member] | Term Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	2.75%
Minimum [Member] | Alternative Base Rate [Member] | Asset-Based Loan Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	0.50%
Minimum [Member] | Alternative Base Rate [Member] | Term Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	1.75%
Maximum [Member] | LIBO Rate [Member] | Asset-Based Loan Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	2.00%
Maximum [Member] | LIBO Rate [Member] | Term Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	3.00%
Maximum [Member] | Alternative Base Rate [Member] | Asset-Based Loan Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	1.00%
Maximum [Member] | Alternative Base Rate [Member] | Term Facility [Member]
Debt Instrument [Line Items]
Spread over variable rate	2.00%
Term 1 [Member] | LIBO Rate [Member]
Debt Instrument [Line Items]
Interest period	1 month
Term 2 [Member] | LIBO Rate [Member]
Debt Instrument [Line Items]
Interest period	2 months
Term 3 [Member] | LIBO Rate [Member]
Debt Instrument [Line Items]
Interest period	3 months
Term 4 [Member] | LIBO Rate [Member]
Debt Instrument [Line Items]
Interest period	6 months

LongTerm_Debt_Summary_Of_LongT

Long-Term Debt (Summary Of Long-Term Debt) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Aug. 14, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
6% senior notes due 2023 (net of unamortized discount of $7,341 at March 2015 and $7,557 at December 2014)	$492,659	$492,443	$500,000
Less unamortized debt issuance costs	-4,016	-4,193
Total notes payable, net	488,643	488,250
Capitalized lease obligations, vehicles, due through 2018	245
Less current maturities	-77
Total long-term debt	488,811	488,250
6% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Interest rate	6.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate			6.00%
Unamortized discount	$7,341	$7,557

Asset_Retirement_Obligations_A1

Asset Retirement Obligations (ARO) (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Asset Retirement Obligations (ARO) [Abstract]
Balance at beginning of period	$22,245	$17,130	$17,130
Accretion expense	378	297	1,200
Liabilities incurred	79		3,915
Balance at end of period	$22,702		$22,245

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Taxes Disclosure [Line Items]
U.S. Federal statutory rate	35.00%	35.00%
Federal [Member]
Income Taxes Disclosure [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2010
State [Member] | Minimum [Member]
Income Taxes Disclosure [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2008
State [Member] | Maximum [Member]
Income Taxes Disclosure [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2011

Income_Taxes_Summary_Of_Effect

Income Taxes (Summary Of Effective Income Tax Rates) (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Taxes [Abstract]
Effective tax rate	42.70%	38.70%

Incentive_Plans_Narrative_Deta

Incentive Plans (Narrative) (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Feb. 10, 2015	Feb. 11, 2015	Aug. 08, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$1,903,000	$2,522,000
Total income tax benefits realized from tax deductions related to stock option exercises under share-based payment arrangements	3,400,000
2013 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized for incentive plan	5,500,000
Maximum number of shares per employee	1,000,000
2013 Long-Term Incentive Plan [Member] | Nonqualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			72,350
Shares granted, exercise price			$70.57
Shares granted, fair value determination method	Black-Scholes
Shares granted, fair value			$20.18
2013 Long-Term Incentive Plan [Member] | Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued			20,200	35,250
Restricted stock units issued, weighted average grant date fair value			$70.57	$70.57
2013 Long-Term Incentive Plan [Member] | Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount payable	$5,000,000
Restricted stock units issued			40,400
2013 Long-Term Incentive Plan [Member] | Return On Average Capital Employed Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued, weighted average grant date fair value			$70.57
Award vesting period	3 years
2013 Long-Term Incentive Plan [Member] | Total Shareholder Return Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted, fair value determination method	Monte Carlo
Restricted stock units issued, weighted average grant date fair value			$100.33
Award vesting period	3 years
Number of companies in total shareholder return peer comparison group	16
2013 Stock Plan For Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized for incentive plan					500,000
Award vesting period	3 years
2013 Stock Plan For Non-Employee Directors [Member] | Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued	12,924
Restricted stock units issued, weighted average grant date fair value	$71.51

Financial_Instruments_And_Risk2

Financial Instruments And Risk Management (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	bu	bu
Derivative [Line Items]
Purchase commitment contracts of bushels of corn	8,800,000	3,500,000
Sale commitment contracts of bushels of wet and dried grain with solubles	500,000	500,000
Increase (decrease) in income before taxes due to the impact of marking to market of derivative contracts	$0.60	($0.60)
Cash deposits related to commodity derivative contracts	$2.30		$2.80
Price Risk Derivative [Member] | Short [Member]
Derivative [Line Items]
Outstanding derivative contracts to sell bushels of corn	2,100,000	500,000
Price Risk Derivative [Member] | Long [Member]
Derivative [Line Items]
Outstanding derivative contracts to sell bushels of corn		500,000
Repurchase Agreement [Member] | Short [Member]
Derivative [Line Items]
Outstanding derivative contracts to sell bushels of corn	2,000,000	1,900,000

Financial_Instruments_And_Risk3

Financial Instruments And Risk Management (Summary Of Fair Value And Recognized Gains And Losses Of Derivative Instruments Not Designated As Hedging Instruments) (Details) (Commodity Contract [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Derivative [Line Items]
Derivative contracts	$673		$74
Derivative contracts	113		2,204
Accounts Receivable [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative contracts	673		74
Accounts Payable [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative contracts	113		2,204
Fuel And Ethanol Costs Of Goods Sold [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (Loss)	$2,197	($1,465)

Financial_Instruments_And_Risk4

Financial Instruments And Risk Management (Summary Of Offsetting Assets) (Details) (Commodity Contract [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Commodity Contract [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$694	$93
Gross Amounts Offset in the Consolidated Balance Sheet	-21	-19
Net Amount of Assets Presented in the Consolidated Balance Sheet	$673	$74

Financial_Instruments_And_Risk5

Financial Instruments And Risk Management (Summary Of Offsetting Liabilities) (Details) (Commodity Contract [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Commodity Contract [Member]
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$134	$2,223
Gross Amounts Offset in the Consolidated Balance Sheet	-21	-19
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	$113	$2,204

Earnings_Per_Share_Narrative_D

Earnings Per Share (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended
In Millions, except Share data, unless otherwise specified	27-May-14	Mar. 31, 2015	Dec. 31, 2014	7-May-14	Oct. 22, 2014
Earnings Per Share Disclosure [Line Items]
Stock repurchase program, shares acquired		1,504,630	1,056,689
May 2014 Share Repurchase Program [Member]
Earnings Per Share Disclosure [Line Items]
Stock repurchase program, approved amount				$50
Stock repurchase program, shares acquired	1,040,636
Stock repurchase program, average price per share	$48.07
$250 Million Share Repurchase Program [Member]
Earnings Per Share Disclosure [Line Items]
Stock repurchase program, approved amount					$250
Stock repurchase program, shares acquired		583,214
Stock repruchase program, expiration date		31-Dec-15

Earnings_Per_Share_Reconciliat

Earnings Per Share (Reconciliation of Basic And Diluted Earnings Per Share Computations) (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$22,932	$9,633
Weighted average common shares outstanding (in thousands)	45,633	46,750
Total earnings per share	$0.50	$0.21
Common share equivalents: Dilutive options	403	134
Weighted average common shares outstanding - assuming dilution (in thousands)	46,036	46,884
Earnings per share - assuming dilution	$0.50	$0.21

Other_Financial_Information_Na

Other Financial Information (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other Financial Information [Abstract]
Income taxes paid, net of refunds	$27,598,000	$50,100,000
Interest paid	$15,444,000	$16,250,000

Other_Financial_Information_Sc

Other Financial Information (Schedule Of Ethanol Sales And Other Revenue) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other Financial Information [Abstract]
Sales of ethanol and related plant products	$41,748	$48,789
Renewable Identification Numbers (RINs) sales	37,599	17,593
Other	952	883
Total ethanol sales and other revenue	$80,299	$67,265

Other_Financial_Information_Su

Other Financial Information (Summary Of Changes In Operating Working Capital) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other Financial Information [Abstract]
Accounts receivable	($26,544)	($19,160)
Inventories	-2,059	90,155
Prepaid expenses	4,153	-253
Accounts payable and accrued liabilities	26,281	53,990
Income taxes payable	-19,687	-40,626
Current deferred income tax liabilities	10,045	646
Net decrease (increase) in noncash operating working capital	($7,811)	$84,752

Assets_And_Liabilities_Measure2

Assets And Liabilities Measured At Fair Value (Schedule Of Fair Value Of Assets And Liabilities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$673	$74
Liabilities	-113	-2,204
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	673	74
Liabilities	($113)	($2,204)

Assets_And_Liabilities_Measure3

Assets And Liabilities Measured At Fair Value (Schedule Of Carrying Amounts And Estimated Fair Value Of Financial Instruments) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets And Liabilities Measured At Fair Value [Abstract]
Current and long-term debt, Carrying Amount	($492,659)	($492,443)
Current and long-term debt. Fair Value	($517,555)	($510,344)

Contingencies_Details

Contingencies (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
	site
Contingencies [Abstract]
Number of Superfund sites for which company may be liable	1
Name of plaintiff	Freeny
Parties jointly and severally liable in litigation	Murphy Oil Corporation and Murphy Oil USA, Inc.
Allegations	the plaintiffs allege that the Company has infringed on their electronic pricing system patent.
Expected trial commencement	2015-06
Workers' compensation deductible (per occurrence)	$500,000
Workers' compensation accrued liability	4,700,000
Outstanding letters of credit	16,200,000
Liability accrued	$0

Business_Segments_Narrative_De

Business Segments (Narrative) (Details)	3 Months Ended
	Mar. 31, 2015
	segment
Business Segments [Abstract]
Number of operating segments	1

Business_Segments_Summary_Of_I

Business Segments (Summary Of Information By Business Segment) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total Assets	$1,923,267		$1,930,064
External Revenues	2,962,515	4,164,334
Income (Loss)	22,932	8,852
Discontinued operations		781
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Assets	1,923,267
External Revenues	2,962,515	4,164,334
Income (Loss)	22,932	8,852
Marketing [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Assets	1,585,410
External Revenues	2,920,504	4,115,437
Income (Loss)	24,756	13,761
Corporate and Other Assets [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Assets	337,857
External Revenues	42,011	48,897
Income (Loss)	($1,824)	($4,909)

Guarantor_Subsidiaries_Consoli

Guarantor Subsidiaries (Consolidating Balance Sheet) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Aug. 14, 2013
In Thousands, unless otherwise specified
Current assets
Cash and cash equivalents	$287,671	$328,105	$369,424	$294,741
Accounts receivable-trade, less allowance for doubtful accounts of $4,456 in 2015 and $4,456 in 2014	165,257	140,091
Inventories, at lower of cost or market	184,972	182,914
Prepaid expenses and other current assets	10,620	14,772
Total current assets	648,520	665,882
Property, plant and equipment, at cost less accumulated depreciation and amortization of $746,804 in 2015 and $730,202 in 2014	1,263,740	1,253,124
Other assets	11,007	11,058
Total assets	1,923,267	1,930,064
Current liabilities
Current maturities of long-term debt	77
Trade accounts payable and accrued liabilities	411,903	386,999
Income taxes payable	5,912	25,600
Deferred income taxes	10,526	481
Total current liabilities	428,418	413,080
Long-term debt, including capitalized lease obligations	488,811	488,250
Deferred income taxes	113,488	118,609
Asset retirement obligations	22,702	22,245
Deferred credits and other liabilities	28,650	29,175
Total liabilities	1,082,069	1,071,359
Stockholders' Equity
Preferred Stock, par $0.01, (authorized 20,000,000 shares, none outstanding)
Common Stock, par $0.01, (authorized 200,000,000 shares, 46,767,164 and 46,767,164 shares issed at March 31, 2015 and December 31, 2014, respectively)	468	468
Treasury stock (1,504,630 and 1,056,689 shares held at March 31, 2015 and December 31, 2014, respectively)	-85,015	-51,073
Additional paid in capital (APIC)	551,374	557,871
Retained earnings	374,371	351,439
Total stockholders' equity	841,198	858,705	668,180	656,336
Total liabilities and stockholders' equity	1,923,267	1,930,064
Eliminations [Member]
Current assets
Investments in subsidiaries	-1,779,886	-1,757,540
Deferred tax assets	-19,322	-19,273
Total assets	-1,799,208	-1,776,813
Current liabilities
Deferred income taxes	-19,322	-19,273
Total liabilities	-19,322	-19,273
Stockholders' Equity
Common Stock, par $0.01, (authorized 200,000,000 shares, 46,767,164 and 46,767,164 shares issed at March 31, 2015 and December 31, 2014, respectively)	-61	-61
Additional paid in capital (APIC)	-1,316,516	-1,316,516
Retained earnings	-463,309	-440,963
Total stockholders' equity	-1,779,886	-1,757,540
Total liabilities and stockholders' equity	-1,799,208	-1,776,813
Parent Company [Member]
Current assets
Investments in subsidiaries	1,603,209	1,580,277
Total assets	1,603,209	1,580,277
Current liabilities
Inter-company accounts payable	90,783	51,348
Total current liabilities	90,783	51,348
Total liabilities	90,783	51,348
Stockholders' Equity
Common Stock, par $0.01, (authorized 200,000,000 shares, 46,767,164 and 46,767,164 shares issed at March 31, 2015 and December 31, 2014, respectively)	468	468
Treasury stock (1,504,630 and 1,056,689 shares held at March 31, 2015 and December 31, 2014, respectively)	-85,015	-51,073
Additional paid in capital (APIC)	1,222,602	1,228,095
Retained earnings	374,371	351,439
Total stockholders' equity	1,512,426	1,528,929
Total liabilities and stockholders' equity	1,603,209	1,580,277
Issuer [Member]
Current assets
Cash and cash equivalents	286,430	327,163	368,629	294,741
Accounts receivable-trade, less allowance for doubtful accounts of $4,456 in 2015 and $4,456 in 2014	163,239	138,466
Inventories, at lower of cost or market	166,720	157,046
Prepaid expenses and other current assets	8,137	11,710
Total current assets	624,526	634,385
Property, plant and equipment, at cost less accumulated depreciation and amortization of $746,804 in 2015 and $730,202 in 2014	1,258,179	1,248,081
Investments in subsidiaries	176,677	177,263
Other assets	10,476	10,543
Total assets	2,069,858	2,070,272
Current liabilities
Current maturities of long-term debt	77
Inter-company accounts payable	46,129	82,528
Trade accounts payable and accrued liabilities	409,202	381,271
Income taxes payable	-1,070	18,348
Deferred income taxes	10,568	522
Total current liabilities	464,906	482,669
Long-term debt, including capitalized lease obligations	488,811	488,250
Deferred income taxes	132,810	137,882
Asset retirement obligations	22,702	22,245
Deferred credits and other liabilities	28,650	29,175
Total liabilities	1,137,879	1,160,221
Stockholders' Equity
Common Stock, par $0.01, (authorized 200,000,000 shares, 46,767,164 and 46,767,164 shares issed at March 31, 2015 and December 31, 2014, respectively)	1	1
Additional paid in capital (APIC)	557,607	558,611
Retained earnings	374,371	351,439
Total stockholders' equity	931,979	910,051
Total liabilities and stockholders' equity	2,069,858	2,070,272
Guarantor Subsidiaries [Member]
Current liabilities
Inter-company accounts payable	-52,078	-52,077
Income taxes payable	16	14
Total current liabilities	-52,062	-52,063
Total liabilities	-52,062	-52,063
Stockholders' Equity
Common Stock, par $0.01, (authorized 200,000,000 shares, 46,767,164 and 46,767,164 shares issed at March 31, 2015 and December 31, 2014, respectively)	60	60
Additional paid in capital (APIC)	52,004	52,004
Retained earnings	-2	-1
Total stockholders' equity	52,062	52,063
Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents	1,241	942	795
Accounts receivable-trade, less allowance for doubtful accounts of $4,456 in 2015 and $4,456 in 2014	2,018	1,625
Inventories, at lower of cost or market	18,252	25,868
Prepaid expenses and other current assets	2,483	3,062
Total current assets	23,994	31,497
Property, plant and equipment, at cost less accumulated depreciation and amortization of $746,804 in 2015 and $730,202 in 2014	5,561	5,043
Other assets	531	515
Deferred tax assets	19,322	19,273
Total assets	49,408	56,328
Current liabilities
Inter-company accounts payable	-84,834	-81,799
Trade accounts payable and accrued liabilities	2,701	5,728
Income taxes payable	6,966	7,238
Deferred income taxes	-42	-41
Total current liabilities	-75,209	-68,874
Total liabilities	-75,209	-68,874
Stockholders' Equity
Additional paid in capital (APIC)	35,677	35,677
Retained earnings	88,940	89,525
Total stockholders' equity	124,617	125,202
Total liabilities and stockholders' equity	$49,408	$56,328
Senior Notes [Member]
Stockholders' Equity
Interest rate					6.00%

Guarantor_Subsidiaries_Consoli1

Guarantor Subsidiaries (Consolidating Income Statement) (Details) (USD $)	3 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Revenues
Petroleum product sales	$2,358,079	[1]	$3,594,347	[1]
Merchandise sales	524,137		502,722
Ethanol sales and other	80,299		67,265
Total revenues	2,962,515		4,164,334
Costs and operating expenses
Petroleum product cost of goods sold	2,261,086	[1]	3,500,346	[1]
Merchandise cost of goods sold	450,553		432,462
Ethanol cost of goods sold	34,580		37,770
Station and other operating expenses	122,175		122,477
Depreciation and amortization	21,178		19,661
Selling, general and administrative	31,456		28,071
Accretion of asset retirement obligations	378		297		1,200
Total costs and operating expenses	2,921,406		4,141,084
Income (loss) from operations	41,109		23,250
Other income (expense)
Interest income	1,873		15
Interest expense	-8,329		-9,095
Gain (loss) on sale of assets	4		170
Other nonoperating income	5,364		112
Total other income (expense)	-1,088		-8,798
Income (loss) from continuing operations before income taxes	40,021		14,452
Income tax expense	17,089		5,600
Income (loss) from continuing operations	22,932		8,852
Income from discontinued operations, net of taxes			781
Net income (loss)	22,932		9,633
Parent Company [Member]
Other income (expense)
Equity earnings (deficit) in affiliates, net of tax	22,932
Net income (loss)	22,932
Issuer [Member]
Revenues
Petroleum product sales	2,390,481		3,634,271
Merchandise sales	524,137		502,722
Ethanol sales and other	38,548		18,476
Total revenues	2,953,166		4,155,469
Costs and operating expenses
Petroleum product cost of goods sold	2,293,488		3,540,270
Merchandise cost of goods sold	450,553		432,462
Station and other operating expenses	114,535		113,815
Depreciation and amortization	21,103		19,634
Selling, general and administrative	31,092		27,625
Accretion of asset retirement obligations	378		297
Total costs and operating expenses	2,911,149		4,134,103
Income (loss) from operations	42,017		21,366
Other income (expense)
Interest income	1,873		15
Interest expense	-8,329		-9,095
Gain (loss) on sale of assets	4		170
Other nonoperating income	5,364		112
Total other income (expense)	-1,088		-8,798
Income (loss) from continuing operations before income taxes	40,929		12,568
Income tax expense	17,411		4,932
Income (loss) from continuing operations	23,518		7,636
Equity earnings (deficit) in affiliates, net of tax	-586
Net income (loss)	22,932		7,636
Guarantor Subsidiaries [Member]
Costs and operating expenses
Selling, general and administrative	1		1
Total costs and operating expenses	1		1
Income (loss) from operations	-1		-1
Other income (expense)
Income (loss) from continuing operations before income taxes	-1		-1
Income (loss) from continuing operations	-1		-1
Net income (loss)	-1		-1
Non-Guarantor Subsidiaries [Member]
Revenues
Ethanol sales and other	41,751		48,789
Total revenues	41,751		48,789
Costs and operating expenses
Ethanol cost of goods sold	34,580		37,770
Station and other operating expenses	7,640		8,662
Depreciation and amortization	75		27
Selling, general and administrative	363		445
Total costs and operating expenses	42,658		46,904
Income (loss) from operations	-907		1,885
Other income (expense)
Income (loss) from continuing operations before income taxes	-907		1,885
Income tax expense	-322		668
Income (loss) from continuing operations	-585		1,217
Income from discontinued operations, net of taxes			781
Net income (loss)	-585		1,998
Eliminations [Member]
Revenues
Petroleum product sales	-32,402		-39,924
Total revenues	-32,402		-39,924
Costs and operating expenses
Petroleum product cost of goods sold	-32,402		-39,924
Total costs and operating expenses	-32,402		-39,924
Other income (expense)
Equity earnings (deficit) in affiliates, net of tax	-22,346
Net income (loss)	($22,346)
[1]	Includes excise taxes of: $462,974 $445,404

Guarantor_Subsidiaries_Consoli2

Guarantor Subsidiaries (Consolidating Statement Of Cash Flow) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Activities
Net income (loss)	$22,932,000	$9,633,000
Adjustments to reconcile net income to net cash provided by operating activities
Income from discontinued operations, net of taxes		-781,000
Depreciation and amortization	21,178,000	19,661,000
Amortization of deferred major repair costs	347,000	169,000
Deferred and noncurrent income tax charges (credits)	-5,121,000	-4,556,000
Accretion on discounted liabilities	378,000	297,000
Pretax gains from sale of assets	-4,000	-170,000
Net decrease (increase) in noncash operating working capital	-7,811,000	84,752,000
Other operating activities - net	2,519,000	3,698,000
Net cash provided by (required by) continuing operations	34,418,000	112,703,000
Net cash provided by discontinued operations		134,000
Net cash provided by (required by) operating activities	34,418,000	112,837,000
Investing Activities
Property additions	-32,215,000	-23,739,000
Proceeds from sale of assets	82,000	279,000
Expenditures for major repairs	-362,000	-728,000
Investing activities of discontinued operations
Sales proceeds		1,097,000
Net cash required by investing activities	-32,495,000	-23,091,000
Financing Activities
Purchase of treasury stock	-39,435,000
Repayments of long-term debt	-15,000	-15,000,000
Debt issuance costs		-63,000
Amounts related to share-based compensation activities	-2,907,000
Net cash provided by (required by) financing activities	-42,357,000	-15,063,000
Net increase (decrease) in cash and cash equivalents	-40,434,000	74,683,000
Cash and cash equivalents at January 1	328,105,000	294,741,000
Cash and cash equivalents at March 31	287,671,000	369,424,000
Eliminations [Member]
Operating Activities
Net income (loss)	-22,346,000
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings (deficit)	22,346,000
Parent Company [Member]
Operating Activities
Net income (loss)	22,932,000
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings (deficit)	-22,932,000
Financing Activities
Purchase of treasury stock	-39,435,000
Net distributions to parent	39,435,000
Issuer [Member]
Operating Activities
Net income (loss)	22,932,000	7,636,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	21,103,000	19,634,000
Deferred and noncurrent income tax charges (credits)	-5,073,000	-5,573,000
Accretion on discounted liabilities	378,000	297,000
Pretax gains from sale of assets	-4,000	-170,000
Net decrease (increase) in noncash operating working capital	-12,313,000	80,464,000
Equity in earnings (deficit)	586,000
Other operating activities - net	2,519,000	3,698,000
Net cash provided by (required by) continuing operations	30,128,000	105,986,000
Net cash provided by (required by) operating activities	30,128,000	105,986,000
Investing Activities
Property additions	-31,622,000	-23,501,000
Proceeds from sale of assets	82,000	279,000
Investing activities of discontinued operations
Net cash required by investing activities	-31,540,000	-23,222,000
Financing Activities
Repayments of long-term debt	-15,000	-15,000,000
Debt issuance costs		-63,000
Amounts related to share-based compensation activities	-2,907,000
Net distributions to parent	-36,399,000	6,187,000
Net cash provided by (required by) financing activities	-39,321,000	-8,876,000
Net increase (decrease) in cash and cash equivalents	-40,733,000	73,888,000
Cash and cash equivalents at January 1	327,163,000	294,741,000
Cash and cash equivalents at March 31	286,430,000	368,629,000
Guarantor Subsidiaries [Member]
Operating Activities
Net income (loss)	-1,000	-1,000
Adjustments to reconcile net income to net cash provided by operating activities
Net cash provided by (required by) continuing operations	-1,000	-1,000
Net cash provided by (required by) operating activities	-1,000	-1,000
Financing Activities
Net distributions to parent	1,000	1,000
Net cash provided by (required by) financing activities	1,000	1,000
Non-Guarantor Subsidiaries [Member]
Operating Activities
Net income (loss)	-585,000	1,998,000
Adjustments to reconcile net income to net cash provided by operating activities
Income from discontinued operations, net of taxes		-781,000
Depreciation and amortization	75,000	27,000
Amortization of deferred major repair costs	347,000	169,000
Deferred and noncurrent income tax charges (credits)	-48,000	1,017,000
Net decrease (increase) in noncash operating working capital	4,502,000	4,288,000
Net cash provided by (required by) continuing operations	4,291,000	6,718,000
Net cash provided by discontinued operations		134,000
Net cash provided by (required by) operating activities	4,291,000	6,852,000
Investing Activities
Property additions	-593,000	-238,000
Expenditures for major repairs	-362,000	-728,000
Investing activities of discontinued operations
Sales proceeds		1,097,000
Net cash required by investing activities	-955,000	131,000
Financing Activities
Net distributions to parent	-3,037,000	-6,188,000
Net cash provided by (required by) financing activities	-3,037,000	-6,188,000
Net increase (decrease) in cash and cash equivalents	299,000	795,000
Cash and cash equivalents at January 1	942,000
Cash and cash equivalents at March 31	$1,241,000	$795,000

Guarantor_Subsidiaries_Consoli3

Guarantor Subsidiaries (Consolidating Statement Of Changes In Equity) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Balance	$858,705	$656,336
Net income	22,932	9,633
Repurchase of common stock	-39,435
Issuance of common stock		-311
Amounts related to share-based compensation	-2,907
Share-based compensation expense	1,903	2,522
Balance	841,198	668,180
Common Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Balance		467	468
Issuance of common stock		1
Balance	468	468	468
Treasury Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	-51,073
Repurchase of common stock	-39,435
Issuance of common stock	5,493
Balance	-85,015
APIC [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	557,871	548,293
Issuance of common stock		-312
Issuance of common stock	-5,493
Amounts related to share-based compensation	-2,907
Share-based compensation expense	1,903	2,522
Balance	551,374	550,503
Retained Earnings [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	351,439	107,576
Net income	22,932	9,633
Balance	374,371	117,209
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	-1,757,540
Net income	-22,346
Balance	-1,779,886
Eliminations [Member] | Common Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Balance			-61	-61
Balance	-61	-61	-61	-61
Eliminations [Member] | APIC [Member]
Condensed Financial Statements, Captions [Line Items]
Balance			-1,316,516	-1,316,516
Balance	-1,316,516	-1,316,516	-1,316,516	-1,316,516
Eliminations [Member] | Retained Earnings [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	-440,963
Net income	-22,346	-176,199
Balance	-463,309	-176,199
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	1,528,929
Net income	22,932
Balance	1,512,426
Parent Company [Member] | Common Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Balance		467	468
Issuance of common stock		1
Balance	468	468	468
Parent Company [Member] | Treasury Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	-51,073
Repurchase of common stock	-39,435
Issuance of common stock	5,493
Balance	-85,015
Parent Company [Member] | APIC [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	1,228,095			1,228,370
Issuance of common stock	-5,493
Balance	1,222,602	1,228,370		1,228,370
Parent Company [Member] | Retained Earnings [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	351,439
Net income	22,932	107,576
Balance	374,371	107,576
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	910,051
Net income	22,932	7,636
Balance	931,979
Issuer [Member] | Common Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Balance			1	1
Balance	1	1	1	1
Issuer [Member] | APIC [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	558,611	548,758
Issuance of common stock		-312
Amounts related to share-based compensation	-2,907
Share-based compensation expense	1,903	2,522
Balance	557,607	550,968
Issuer [Member] | Retained Earnings [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	351,439	38,954
Net income	22,932	76,259
Balance	374,371	115,213
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	52,063
Net income	-1	-1
Balance	52,062
Guarantor Subsidiaries [Member] | Common Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Balance			60	60
Balance	60	60	60	60
Guarantor Subsidiaries [Member] | APIC [Member]
Condensed Financial Statements, Captions [Line Items]
Balance			52,004	52,004
Balance	52,004	52,004	52,004	52,004
Guarantor Subsidiaries [Member] | Retained Earnings [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	-1
Net income	-1	-1
Balance	-2	-1
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	125,202
Net income	-585	1,998
Balance	124,617
Non-Guarantor Subsidiaries [Member] | APIC [Member]
Condensed Financial Statements, Captions [Line Items]
Balance			35,677	35,677
Balance	35,677	35,677	35,677	35,677
Non-Guarantor Subsidiaries [Member] | Retained Earnings [Member]
Condensed Financial Statements, Captions [Line Items]
Balance	89,525	68,622
Net income	-585	1,998
Balance	$88,940	$70,620