Price-Risk Management Price-Risk Management (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments [Table Text Block]

The following tables summarizes the weighted average prices as well as future production volumes for our unsettled derivative contracts in place as of December 31, 2017.

Oil Derivative Swaps (NYMEX WTI Settlements)	Total Volumes (Bbls)	Weighted Average Price
2018 Contracts
1Q18	151,000	$	52.80
2Q18	140,400	$	52.57
3Q18	130,400	$	52.40
4Q18	122,800	$	52.23
2019 Contracts
1Q19	97,200	$	52.40
2Q19	92,700	$	52.32
3Q19	88,500	$	52.39
4Q19	84,500	$	52.30
2020 Contracts
1Q20	51,000	$	51.49
2Q20	49,250	$	51.46
3Q20	47,500	$	51.42
4Q20	46,500	$	51.40

Natural Gas Derivative Swaps (NYMEX Henry Hub Settlements)	Total Volumes (MMBtu)	Weighted Average Price
2018 Contracts
1Q18	5,238,000	$	3.42
2Q18	8,245,000	$	2.86
3Q18	8,014,000	$	2.88
4Q18	7,976,000	$	2.96
2019 Contracts
1Q19	6,016,000	$	3.07
2Q19	6,060,000	$	2.83
3Q19	5,550,000	$	2.84
4Q19	5,966,000	$	2.84
2020 Contracts
1Q20	5,370,000	$	2.83
2Q20	1,170,000	$	2.86
3Q20	1,170,000	$	2.86
4Q20	1,170,000	$	2.86

NGL Derivative Swaps (OPIS Settlements)	Total Volumes (Bbls)	Weighted Average Price
2018 Contracts
1Q18	126,000	$	24.78
2Q18	118,200	$	24.78
3Q18	112,200	$	24.78
4Q18	148,200	$	24.78

Natural Gas Basis Derivative Swaps (East Texas Houston Ship Channel Settlements)	Total Volumes (MMBtu)	Weighted Average Price
2018 Contracts
1Q18	5,105,000	$	(0.11	)
2Q18	6,795,000	$	(0.04	)
3Q18	3,020,000	$	(0.03	)
4Q18	2,730,000	$	(0.09	)
2019 Contracts
1Q19	750,000	$	(0.11	)

Oil Basis Derivative Swaps (NYMEX WTI and Argus Settlements)	Total Volumes (Bbls)	Weighted Average Price
2018 Contracts
1Q18	20,000	$	4.06
2Q18	30,000	$	4.06
3Q18	30,000	$	4.06
4Q18	30,000	$	4.06