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Derivative Instruments - Balance Sheet Location (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Not Designated as Hedging Instrument
Derivatives, Fair Value
Derivative asset fair value	$ 982	$ 615
Derivative liability fair value	161	81
Commodity derivative contracts | Not Designated as Hedging Instrument | Prepaid and other current assets
Derivatives, Fair Value
Derivative asset fair value	165	376
Commodity derivative contracts | Not Designated as Hedging Instrument | Other current liabilities
Derivatives, Fair Value
Derivative liability fair value	0	0
Foreign currency derivatives | Not Designated as Hedging Instrument | Prepaid and other current assets
Derivatives, Fair Value
Derivative asset fair value	817	239
Foreign currency derivatives | Not Designated as Hedging Instrument | Other current liabilities
Derivatives, Fair Value
Derivative liability fair value	161	81
Cash Flow Hedging | Commodity derivative contracts | Designated as Hedging Instrument
Derivatives, Fair Value
Derivative asset fair value	1	3,410
Derivative liability fair value	22,253	4,199
Cash Flow Hedging | Commodity derivative contracts | Designated as Hedging Instrument | Prepaid and other current assets
Derivatives, Fair Value
Derivative asset fair value	1	104
Cash Flow Hedging | Commodity derivative contracts | Designated as Hedging Instrument | Other accrued liabilities
Derivatives, Fair Value
Derivative liability fair value	4,653	1,872
Cash Flow Hedging | Commodity derivative contracts | Designated as Hedging Instrument | Other long-term assets
Derivatives, Fair Value
Derivative asset fair value	0	369
Cash Flow Hedging | Commodity derivative contracts | Designated as Hedging Instrument | Other long-term obligations
Derivatives, Fair Value
Derivative liability fair value	4,261	2,255
Cash Flow Hedging | Interest rate swap contract | Designated as Hedging Instrument | Prepaid and other current assets
Derivatives, Fair Value
Derivative asset fair value	0	253
Cash Flow Hedging | Interest rate swap contract | Designated as Hedging Instrument | Other accrued liabilities
Derivatives, Fair Value
Derivative liability fair value	5,730	0
Cash Flow Hedging | Interest rate swap contract | Designated as Hedging Instrument | Other long-term assets
Derivatives, Fair Value
Derivative asset fair value	0	2,684
Cash Flow Hedging | Interest rate swap contract | Designated as Hedging Instrument | Other long-term obligations
Derivatives, Fair Value
Derivative liability fair value	$ 7,609	$ 72

X

- Definition

Fair value, before 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. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or 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. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
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-Name Accounting Standards Codification
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No definition available.

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