Description of Business and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) Petroleum_Refineries mi	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Deferred Finance Costs, Net		$ 600,000
Inventory Valuation Reserves	$ (624,457,000)	(397,478,000)
Impairment of Long-Lived Assets Held-for-use	$ 0	0	$ 0
Number of refineries located in Tulsa, Oklahoma | Petroleum_Refineries	2
Refinery distance from main city (miles) | mi	65
Percentage of ownership interest	50.00%
Allowance for doubtful accounts	$ 2,300,000	2,400,000
Asset retirement obligation	20,700,000	19,800,000
Investment in SLC Pipeline	0	0
Turnaround and Catalyst Amortization Costs	107,800,000	96,900,000	$ 84,800,000
Deferred Income Tax Liabilities, Net		17,400,000
Third Party Transportation Agreement [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Minimum annual cash inflows from third-party transportation agreement	26,200,000
Third-party transportation agreement, amortization expense	2,000,000
Finite-Lived Intangible Assets, Net	38,500,000	40,500,000
Finite-Lived Intangible Assets, Accumulated Amortization	$ 21,700,000	$ 19,700,000
SLC Pipeline
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	25.00%
Frontier Pipeline [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Frontier Pipeline [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Length of pipeline | mi	289
UNEV Pipeline [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	75.00%
Variable Interest Entity, Primary Beneficiary [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Percentage of ownership in variable interest entity	39.00%
Percentage of ownership interest	2.00%
Equity Method Investment, Ownership Percentage	75.00%
Variable Interest Entity, Primary Beneficiary [Member] | SLC Pipeline
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Difference between Carrying Amount and Underlying Equity	$ (33,400,000)
Equity Method Investment, Underlying Equity in Net Assets	57,700,000
Investment in SLC Pipeline	24,300,000
Variable Interest Entity, Primary Beneficiary [Member] | Frontier Pipeline [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Difference between Carrying Amount and Underlying Equity	(42,600,000)
Equity Method Investment, Underlying Equity in Net Assets	12,600,000
Investment in SLC Pipeline	$ 55,200,000
Transportation vehicles
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets, minimum	5 years
Minimum [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Frequency of maintenance, in period	2 years
Minimum [Member] | Refining Pipeline And Terminal Facilities [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets, minimum	20 years
Minimum [Member] | Buildings and Improvements [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets, minimum	10 years
Minimum [Member] | Other fixed assets
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets, minimum	5 years
Maximum [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Frequency of maintenance, in period	5 years
Maximum [Member] | Refining Pipeline And Terminal Facilities [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets, minimum	25 years
Maximum [Member] | Buildings and Improvements [Member]
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets, minimum	40 years
Maximum [Member] | Other fixed assets
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets, minimum	30 years