Derivative Financial Instruments (Details) - Open costless collar contracts $ in Thousands	Mar. 31, 2016 USD ($) MMBTU $ / MMBTU $ / bbl bbl
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	$ 9,445
Oil, Calculation Period 04/01/2016 - 12/31/2016
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	2,070,000
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)	$ 7,998
Oil, Calculation Period 01/01/2017 - 12/31/2017
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	1,560,000
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / bbl	38.62
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / bbl	47.62
Fair Value of Asset (Liability)	$ (2,571)
Natural Gas, Calculation Period 04/01/2016 - 12/31/2016
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | MMBTU	9,000,000
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / MMBTU	2.60
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / MMBTU	3.53
Fair Value of Asset (Liability)	$ 4,130
Natural Gas, Calculation Period 01/01/2017 - 12/31/2017
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | MMBTU	9,000,000
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / MMBTU	2.27
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / MMBTU	3.50
Fair Value of Asset (Liability)	$ (112)