Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Commodity Derivative Positions

The following table sets forth our commodity derivative positions as of December 31, 2018:

		Average	Weighted
		Volume Per	Average		Fair Value
	Instrument	Day	Price		Asset		Liability
Crude Oil:		(barrels)	($/barrel)
First quarter 2019	Swaps-WTI	6,446	$	54.46	$	4,959	$	—
First quarter 2019	Swaps-LLS	5,000	$	59.17	3,684		—
Second quarter 2019	Swaps-WTI	6,421	$	54.48	4,307		—
Second quarter 2019	Swaps-LLS	5,000	$	59.17	3,203		—
Third quarter 2019	Swaps-WTI	6,397	$	54.50	3,821		—
Third quarter 2019	Swaps-LLS	5,000	$	59.17	3,092		—
Fourth quarter 2019	Swaps-WTI	6,398	$	54.50	3,498		—
Fourth quarter 2019	Swaps-LLS	5,000	$	59.17	3,015		—
First quarter 2020	Swaps-WTI	6,000	$	54.09	2,807		—
Second quarter 2020	Swaps-WTI	6,000	$	54.09	2,609		—
Third quarter 2020	Swaps-WTI	6,000	$	54.09	2,450		—
Fourth quarter 2020	Swaps-WTI	6,000	$	54.09	2,234		—
Settlements to be received in subsequent period, net					4,362

Impact of Derivative Activities on Condensed Consolidated Statements of Income

The impact of our derivatives activities on income is included in the “Derivatives” caption on our Consolidated Statements of Operations. The following table summarizes the effects of our derivative activities for the periods presented:

	Successor								Predecessor
						September 13 Through			January 1 Through
	Year Ended December 31,					December 31,			September 12,
	2018		2017			2016			2016
Derivative gains (losses)	$	37,427	$	(17,819	)	$	(16,622	)	$	(8,333	)

Fair Value of Derivative Instruments on Condensed Consolidated Balance Sheets

The following table summarizes the fair value of our derivative instruments, as well as the locations of these instruments, on our Consolidated Balance Sheets as of the dates presented:

		Fair Values
		December 31, 2018				December 31, 2017
		Derivative		Derivative		Derivative		Derivative
Type	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
Commodity contracts	Derivative assets/liabilities – current	$	34,932	$	991	$	—	$	27,777
Commodity contracts	Derivative assets/liabilities – noncurrent	10,100		—		—		13,900
		$	45,032	$	991	$	—	$	41,677