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Subsequent Events - Narrative (Details) mbpd in Thousands, Mcf in Thousands, MBbls in Millions |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 11, 2019 USD ($) mbpd shares MBbls | Jan. 09, 2019 USD ($) | Jan. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) mbpd Mcf | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Mar. 04, 2019 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |  |
Oil and gas refinery | mbpd |  |  |  | 200 |  |  |
Reserves | Mcf |  |  |  | 423,878 |  |  |
Debt extinguishment and commitment costs |  |  |  | $ (4,224,000) | $ (8,633,000) | $ 0 |
Proceeds from issuance of debt |  |  |  | $ 118,741,000 | $ 616,706,000 | $ 354,682,000 |
Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Debt extinguishment and commitment costs |  |  | $ (5,400,000) |  |  |  |
Washington Refinery Acquisition | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Consideration transferred, net working capital | $ 358,000,000 |  |  |  |  |  |
Oil and gas refinery | mbpd | 42 |  |  |  |  |  |
Reserves | MBbls | 2.9 |  |  |  |  |  |
Consideration transferred | $ 326,700,000 |  |  |  |  |  |
Payments to acquire businesses | $ 289,700,000 |  |  |  |  |  |
Issuance of common stock in connection with acquisition (in shares) | shares | 2,363,776 |  |  |  |  |  |
Term Loan Facility | GS Term Loan Facility | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Aggregate principal amount | $ 250,000,000 |  |  |  |  |  |
Proceeds from issuance of debt | $ 228,900,000 |  |  |  |  |  |
Term Loan Facility | GS Term Loan Facility | London Interbank Offered Rate (LIBOR) | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate | 6.75% |  |  |  |  |  |
Term Loan Facility | GS Term Loan Facility | Base Rate | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate | 5.75% |  |  |  |  |  |
Term Loan | Par Pacific Term Loan | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Aggregate principal amount |  | $ 45,000,000 |  |  |  |  |
Term Loan | Par Pacific Term Loan | London Interbank Offered Rate (LIBOR) | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  | 3.50% |  |  |  |  |
Washington Refinery Intermediation Agreement | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Percentage of receivables and inventory for deferred payment | 95.00% |  |  |  |  |  |
Amount of deferred payment arrangement | $ 90,000,000.0 |  |  |  |  |  |
Laramie Energy Company | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Agreement amount to divest producing property |  |  |  |  |  |  | $ 17,500,000

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