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Fair Value Measurements - Carrying Value and Fair Value of Long-Term Debt and Other Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016 | Jul. 14, 2016
--- | --- | --- | ---
5.00% Convertible Senior Notes due 2021 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt instrument, interest rate | 5.00% |  | 5.00%
J. Aron Forward Sale |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Current yield used for long-term debt fair value estimate |  | 8.00% |
Wyoming Refining Senior Secured Term Loan |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Current yield used for long-term debt fair value estimate |  | 11.06% |
Carrying Value | Warrant |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Warrants not settleable in cash, fair value | $ 6,370 | $ 5,134 |
Carrying Value | Term Loan |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt |  | 57,426 |
Carrying Value | Wyoming Refining Senior Secured Revolver |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 14,403 | 6,700 |
Carrying Value | Hawaii Retail Credit Facilities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 86,451 | 93,853 |
Carrying Value | 5.00% Convertible Senior Notes due 2021 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 93,200 | 91,029 |
Carrying Value | J. Aron Forward Sale |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 29,512 |  |
Carrying Value | Par Wyoming Holdings Term Loan |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 66,062 | 65,908 |
Carrying Value | Wyoming Refining Senior Secured Term Loan |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 50,928 | 55,480 |
Fair Value | Warrant |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Warrants not settleable in cash, fair value | 6,370 | 5,134 |
Fair Value | Term Loan |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt |  | 62,367 |
Fair Value | Wyoming Refining Senior Secured Revolver |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 14,403 | 6,700 |
Fair Value | Hawaii Retail Credit Facilities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 86,451 | 93,853 |
Fair Value | 5.00% Convertible Senior Notes due 2021 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 140,315 | 122,229 |
Fair Value | J. Aron Forward Sale |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 29,476 |  |
Fair Value | Par Wyoming Holdings Term Loan |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | 66,062 | 65,908 |
Fair Value | Wyoming Refining Senior Secured Term Loan |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Long-term debt | $ 50,928 | $ 55,480 |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Fair value portion of warrants not settleable in cash classified as equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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