Derivative Instruments and Hedging Activities Disclosure [Line Items]

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- References

No definition available.

+ Details

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- Definition

Payments For (Proceeds From) Derivative Instruments Operating Activities

+ References

No definition available.

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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

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Derivatives - Derivative Activity (Details) $ in Thousands	3 Months Ended		9 Months Ended
Derivatives - Derivative Activity (Details) $ in Thousands	Sep. 30, 2019 USD ($) institution	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) institution	Sep. 30, 2018 USD ($)	Jul. 31, 2019 swap
Derivative Instruments and Hedging Activities Disclosure
(Gain) loss on derivative contracts	$ (1,756)	$ 11,329	$ (1,547)	$ 59,763
Cash (received) paid on settlements			$ (5,700)	29,025
Number of counterparties to open derivative contracts \| institution	2		2
Oil swap contract
Derivative Instruments and Hedging Activities Disclosure
Number of instruments held \| swap					2
Commodity derivative contracts
Derivative Instruments and Hedging Activities Disclosure
(Gain) loss on derivative contracts	$ (1,756)	11,329	$ (1,547)	59,763
Cash (received) paid on settlements	$ (622)	$ 11,631	$ (5,700)	$ 29,025