Derivative Financial Instruments (Details) - Open costless collar contracts $ in Thousands	Sep. 30, 2016 USD ($) MMBTU bbl $ / MMBTU $ / bbl
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	$ (13,977)
Oil, Calculation Period 04/01/2016 - 12/31/2016
Summary of contracts for oil and natural gas
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / bbl	42.48
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / bbl	61.16
Fair Value of Asset (Liability)	$ (788)
Derivative, Nonmonetary Notional Amount | bbl	690,000
Oil, Calculation Period 01/01/2017 - 12/31/2017
Summary of contracts for oil and natural gas
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / bbl	39.56
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / bbl	50.36
Fair Value of Asset (Liability)	$ (11,097)
Derivative, Nonmonetary Notional Amount | bbl	2,160,000
Natural Gas, Calculation Period 04/01/2016 - 12/31/2016
Summary of contracts for oil and natural gas
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / MMBTU	2.65
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / MMBTU	3.68
Fair Value of Asset (Liability)	$ (43)
Derivative, Nonmonetary Notional Amount | MMBTU	4,660,000
Natural Gas, Calculation Period 01/01/2017 - 12/31/2017
Summary of contracts for oil and natural gas
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / MMBTU	2.40
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / MMBTU	3.59
Fair Value of Asset (Liability)	$ (2,049)
Derivative, Nonmonetary Notional Amount | MMBTU	16,860,000