Derivative Contracts Schedule of Commodity Derivative Contracts (Details) bbl in Millions, MMBTU in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) MMBTU bbl $ / MMBTU $ / bbl
Oil Swaps [Member] | Production [Member] | Year 2017 [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl	13.5
Underlying, Derivative Asset | $ / bbl	51.39
Oil Swaps [Member] | Production [Member] | Year 2018 [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl	7.3
Underlying, Derivative Asset | $ / bbl	53.40
Gas Swaps [Member] | Production [Member] | Year 2017 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	94.9
Underlying, Derivative Asset | $ / MMBTU	2.86
Gas Swaps [Member] | Production [Member] | Year 2017 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	32.9
Underlying, Derivative Asset | $ / MMBTU	2.51
Gas Swaps [Member] | Production [Member] | Year 2018 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	62.1
Underlying, Derivative Asset | $ / MMBTU	2.96
Gas Swaps [Member] | Storage [Member] | Year 2017 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	4.0
Underlying, Derivative Asset | $ / MMBTU	2.88
Gas Collars [Member] | Production [Member] | Year 2017 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	11.0
Derivative Average Price Floor | $	$ 2.50
Derivative Average Price Ceiling | $	$ 3.50
Oil Basis Swaps [Member] | Production [Member] | Year 2017 [Member] | NYMEX WTI less Argus WTI Midland [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	2.9
Derivatives, Weighted Average Differential | $	$ (0.64)
Oil Basis Swaps [Member] | Production [Member] | Year 2018 [Member] | NYMEX WTI less Argus WTI Midland [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	2.2
Derivatives, Weighted Average Differential | $	$ (0.90)
Gas Basis Swaps [Member] | Production [Member] | Year 2017 [Member] | NYMEX HH less IFNPCR [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	51.1
Derivatives, Weighted Average Differential | $	$ (0.18)
Gas Basis Swaps [Member] | Production [Member] | Year 2018 [Member] | NYMEX HH less IFNPCR [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	7.3
Derivatives, Weighted Average Differential | $	$ (0.16)