Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
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Nominal mass used to calculate payments on a derivative instrument.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
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Derivative Commodity Instruments (Details) $ in Thousands, lb in Millions, gal in Millions			3 Months Ended		6 Months Ended
	Mar. 31, 2020 lb gal	Dec. 31, 2019 USD ($) lb gal	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume \| gal	15.1	39.1
Derivative, Nonmonetary Notional Amount, Mass \| lb	36.0	93.0
Derivative Liability, Current		$ 1,959	$ 385		$ 385
Derivative Asset, Current		$ 597	810		810
Sales [Member]
Derivative [Line Items]
Gain on derivative instruments				$ 215	2,155	$ 2,426
Loss on derivative instruments			(1,199)
Cost of Sales [Member]
Derivative [Line Items]
Gain on derivative instruments			$ 1,291
Loss on derivative instruments				$ (504)	$ (157)	$ (1,384)