Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Debt - Par Pacific Term Loan Agreement (Details) - USD ($)			9 Months Ended
	Jan. 11, 2019	Jan. 09, 2019	Sep. 30, 2019
Debt Instrument [Line Items]
Amortization of debt issuance costs			$ 3,700,000
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Margin on LIBOR rate	3.25%
Term Loan \| Par Pacific Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount		$ 45,000,000.0
Amortization of debt issuance costs			$ 100,000
Term Loan \| Par Pacific Term Loan \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Margin on LIBOR rate		3.50%