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Commitments and Contingencies (Details) |  | 9 Months Ended | 12 Months Ended | 14 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 23, 2015 | Sep. 30, 2017 USD ($) claim | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2017 USD ($) claim | Jun. 17, 2013 USD ($)
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Loss contingency, damages sought |  | $ 4,500,000 |  |  |  |
Multiplier for earnout payment before EBITDA |  | 4 |  |  | 4 |
Minimum EBITDA benchmark |  | $ 3,500,000.0 |  |  | $ 3,500,000.0 |
Maximum earnout payment amount |  | $ 4,500,000.0 |  |  | 4,500,000.0 |
Site contingency, recovery from third party of environmental remediation cost |  |  |  |  | 11,800,000 |
Environmental costs recognized, capitalized in period |  |  |  |  | $ 12,500,000 |
Number of remaining claim to be resolved | claim |  | 2 |  |  | 2 |
Bankruptcy claims amount of claims to be settled |  | $ 22,400,000 |  |  | $ 22,400,000 |
Estimated value of claims remaining to be settled |  | 500,000 |  |  | 500,000 |
Maximum bankruptcy claims remaining |  | $ 22,400,000 |  |  | $ 22,400,000 |
Predecessor working ownership percentage |  | 3.40% |  |  | 3.40% |
Allowed claims, settlement ratio |  | 0.0544 |  |  |  |
Indemnification Agreement | Tesoros |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Deductible for indemnification obligation |  | $ 1,000,000 |  |  | $ 1,000,000 |
Indemnification obligation cap |  | 15,000,000 |  |  | 15,000,000 |
Clear Air Act Violation |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Final decree high estimate |  | 30,000,000 |  |  |  |
Pending Litigation |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Claim amount for environmental losses (more than) |  | 1,000,000 |  |  | 1,000,000 |
Wyoming Refinery One |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Environmental remediation expense |  | $ 20,000,000 |  |  | 20,000,000 |
Environmental costs recognized, period for recognition of one third costs |  | 5 years |  |  |  |
Environmental costs recognized, remainder, period for recognition |  | 30 years |  |  |  |
Wyoming Refinery Two | Wastewater Treatment Pond |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Environmental remediation expense |  | $ 500,000 |  |  | 500,000 |
Wyoming Refinery Two | Waste Water Treatment System |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Environmental remediation expense |  | 11,600,000 |  |  | 11,600,000 |
Wyoming Refinery |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Loss contingency, range of possible loss |  | $ 100,000 |  |  | $ 100,000 |
United Steelworkers Union |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Collective bargaining arrangement, extension term | 4 years |  |  |  |  |
Tesoro |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |
Contingent consideration (up to) |  |  |  |  |  | $ 20,000,000
Loss contingency, damages paid |  |  | $ 16,800,000.0 |  |  |
Loss contingency, damages sought |  |  | $ 8,300,000 | $ 4,300,000 |  |

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