Derivative Financial Instruments (Details) $ in Thousands	Jun. 30, 2019 USD ($) bbl MMBTU $ / bbl $ / MMBTU	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Derivative Asset (Liability), Net | $	$ 10,284	$ 49,846
Open costless collar contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) | $	8,181
Open Swap Collar Contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) | $	$ (1,254)
Derivative Contract, Calculation Period One | Open costless collar contracts | Oil - WTI
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	3,900,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	50.26
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	70.94
Fair Value of Asset (Liability) | $	$ 3,354
Derivative Contract, Calculation Period One | Open costless collar contracts | Natural Gas
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | MMBTU	1,200,000
Weighted Average Price Floor ($/Bbl or $/MMBtu) | $ / MMBTU	2.50
Weighted Average Price Ceiling ($/Bbl or $/MMBtu) | $ / MMBTU	3.80
Fair Value of Asset (Liability) | $	$ 272
Derivative Contract, Calculation Period One | Open Three-way Costless Collar Contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) | $	$ 3,357
Derivative Contract, Calculation Period One | Open Three-way Costless Collar Contracts | Oil - WTI
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	660,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	60.00
Fair Value of Asset (Liability) | $	$ 2,829
Derivative Contract, Calculation Period One | Open Three-way Costless Collar Contracts | Natural Gas
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	2,400,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	2.50
Fair Value of Asset (Liability) | $	$ 528
Derivative Contract, Calculation Period One | Open Swap Collar Contracts | Oil Basis Swaps
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	1,377,000
Derivative, Swap Type, Average Fixed Price	0.33
Fair Value of Asset (Liability) | $	$ (39)
Derivative Contract, Calculation Period One | Short Call | Open Three-way Costless Collar Contracts | Oil - WTI
Summary of contracts for oil and natural gas
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	75.00
Derivative Contract, Calculation Period One | Short Call | Open Three-way Costless Collar Contracts | Natural Gas
Summary of contracts for oil and natural gas
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	3.00
Derivative Contract, Calculation Period One | Long Call | Open Three-way Costless Collar Contracts | Oil - WTI
Summary of contracts for oil and natural gas
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	78.85
Derivative Contract, Calculation Period One | Long Call | Open Three-way Costless Collar Contracts | Natural Gas
Summary of contracts for oil and natural gas
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	3.24
Derivative Contract, Calculation Period Two | Open costless collar contracts | Oil - WTI
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	2,640,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	48.50
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	69.50
Fair Value of Asset (Liability) | $	$ 4,555
Derivative Contract, Calculation Period Two | Open Swap Collar Contracts | Oil Basis Swaps
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) | bbl	4,494,000
Derivative, Swap Type, Average Fixed Price	0.42
Fair Value of Asset (Liability) | $	$ (1,215)