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Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of impact of netting agreements and margin deposits on gross derivative assets

The table below reflects the impact of netting agreements and margin deposits on gross derivative assets and liabilities as of September 30, 2018 and December 31, 2017. The margin deposit within the table as of September 30, 2018 represents funds remitted to a broker for exchange traded derivative commodity instruments. 

As of September 30, 2018		Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross				Derivative instruments subject to master netting agreements				Margin deposits remitted to counterparties				Derivative instruments, net
		(Thousands)
Asset derivatives:
Derivative instruments, at fair value		$	315,564			$	(104,559	)		$	—			$	211,005
Liability derivatives:
Derivative instruments, at fair value		$	183,677			$	(104,559	)		$	(11,110	)		$	68,008

As of December 31, 2017		Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross				Derivative instruments subject to  master netting agreements				Margin deposits remitted to counterparties				Derivative instruments, net
		(Thousands)
Asset derivatives:
Derivative instruments, at fair value		$	241,952			$	(86,856	)		$	—			$	155,096
Liability derivatives:
Derivative instruments, at fair value		$	139,089			$	(86,856	)		$	—			$	52,233

Schedule of impact of netting agreements and margin deposits on gross derivative liabilities

The table below reflects the impact of netting agreements and margin deposits on gross derivative assets and liabilities as of September 30, 2018 and December 31, 2017. The margin deposit within the table as of September 30, 2018 represents funds remitted to a broker for exchange traded derivative commodity instruments. 

As of September 30, 2018		Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross				Derivative instruments subject to master netting agreements				Margin deposits remitted to counterparties				Derivative instruments, net
		(Thousands)
Asset derivatives:
Derivative instruments, at fair value		$	315,564			$	(104,559	)		$	—			$	211,005
Liability derivatives:
Derivative instruments, at fair value		$	183,677			$	(104,559	)		$	(11,110	)		$	68,008

As of December 31, 2017		Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross				Derivative instruments subject to  master netting agreements				Margin deposits remitted to counterparties				Derivative instruments, net
		(Thousands)
Asset derivatives:
Derivative instruments, at fair value		$	241,952			$	(86,856	)		$	—			$	155,096
Liability derivatives:
Derivative instruments, at fair value		$	139,089			$	(86,856	)		$	—			$	52,233

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- References

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- Definition

Tabular disclosure of derivative and other financial assets that are subject to offsetting, including master netting arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312

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- Definition

Tabular disclosure of derivative and other financial liabilities that are subject to offsetting, including master netting arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312

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