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Debt - Mid Pac Agreement (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2016 | Apr. 01, 2015
Debt Instrument [Line Items] |  |  |
Long-term debt | $ 165,212,000 | $ 370,396,000 |
Secured Debt | Mid Pac Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Line credit maximum borrowing amount |  |  | $ 50,000,000
Revolving Credit Facility | Mid Pac Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Line credit maximum borrowing amount |  |  | 5,000,000
Mid Pac Petroleum, LLC | Mid Pac Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  |  | 55,000,000
Mid Pac Petroleum, LLC |  |  |
Debt Instrument [Line Items] |  |  |
Financing costs expensed | $ 381,000 |  |
Mid Pac Petroleum, LLC | Mid Pac Petroleum, LLC |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  |  | $ 45,300,000

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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