Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents information about the Partnership’s assets and liabilities measured at fair value on a recurring basis: 

	Fair Value Measurements Using						Effect of Counterparty
	Level 1		Level 2		Level 3		Netting			Total
	(In thousands)
As of December 31, 2017
Financial Assets
Commodity derivative instruments	$	—	$	12,105	$	—	$	(11,648	)	$	457
Financial Liabilities
Commodity derivative instruments	—		17,133		—		(11,648		)	5,485
As of December 31, 2016
Financial Assets
Commodity derivative instruments	$	—	$	3,879	$	—	$	(3,879	)	$	—
Financial Liabilities
Commodity derivative instruments	—		20,598		—		(3,879		)	16,719

Schedule of Assets Measured at Fair Value on a Non-recurring Basis

The following table presents information about the Partnership’s assets measured at fair value on a non-recurring basis:

	Fair Value Measurements Using						Net Book
	Level 1		Level 2		Level 31		Value1		Impairment
	(In thousands)
Year Ended December 31, 2017
Impaired oil and natural gas properties	$	—	$	—	$	—	$	—	$	—
Year Ended December 31, 2016
Impaired oil and natural gas properties	$	—	$	—	$	3,042	$	9,817	$	6,775
Year Ended December 31, 2015
Impaired oil and natural gas properties	$	—	$	—	$	156,689	$	406,258	$	249,569

  ¹ Amounts represent fair value and net book value at the date of assessment.