Derivative Financial Instruments (Details) - Open costless collar contracts $ in Thousands	Jun. 30, 2016 USD ($) MMBTU $ / MMBTU $ / bbl bbl
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	$ (17,181)
Oil, Calculation Period 04/01/2016 - 12/31/2016
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	1,380,000
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)	$ (2,091)
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)	$ (11,801)
Natural Gas, Calculation Period 04/01/2016 - 12/31/2016
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | MMBTU	7,200,000
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / MMBTU	2.63
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / MMBTU	3.61
Fair Value of Asset (Liability)	$ (228)
Natural Gas, Calculation Period 01/01/2017 - 12/31/2017
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | MMBTU	14,580,000
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / MMBTU	2.38
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / MMBTU	3.48
Fair Value of Asset (Liability)	$ (3,061)