Derivative Instruments and Hedging Activities - Summary of Outstanding Derivative Contracts (Details)	Mar. 31, 2019 bbl / d MMBTU / d $ / bbl $ / MMBTU
Crude Oil Contract | NYMEX WTI - Swaps 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	22,000
Crude Oil Contract | NYMEX WTI - Three-Way Collars 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	33,000
Crude Oil Contract | NYMEX WTI - Swaption 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	5,000
Weighted Average Fixed Price ($ per bbl)	62.50
Crude Oil Contract | ICE Brent - Swaps 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	5,000
Weighted Average Fixed Price ($ per bbl)	57.00
Crude Oil Contract | ICE Brent - Three-Way Collars 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	3,000
Crude Oil Contract | Basis Swaps 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	27,000
Weighted Average Differential ($ per bbl)	(3.23)
Crude Oil Contract | NYMEX WTI - Swaption 2020
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	5,000
Crude Oil Contract | NYMEX WTI - Three-Way Swaps 2020
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	10,000
Crude Oil Contract | Basis Swaps 2020
Derivative [Line Items]
Bbls Per Day (Bbls per day) | bbl / d	15,000
Weighted Average Differential ($ per bbl)	(5.01)
Natural Gas Contract | NYMEX HH - Three-Way Collars 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | MMBTU / d	104,000
Weighted Average Short Put Price ($ per bbl) | $ / MMBTU	2.25
Weighted Average Floor Price ($ per bbl) | $ / MMBTU	2.65
Weighted Average Ceiling Price ($ per bbl) | $ / MMBTU	2.95
Natural Gas Contract | NYMEX HH - Swaps 2020
Derivative [Line Items]
Bbls Per Day (Bbls per day) | MMBTU / d	46,000
Natural Gas Contract | CIG - Basis Swaps 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | MMBTU / d	113,500
Weighted Average Differential ($ per bbl) | $ / MMBTU	(0.65)
Natural Gas Contract | WAHA - Basis Swaps 2019
Derivative [Line Items]
Bbls Per Day (Bbls per day) | MMBTU / d	15,000
Weighted Average Differential ($ per bbl) | $ / MMBTU	(1.44)
Natural Gas Contract | CIG - Basis Swaps 2020
Derivative [Line Items]
Bbls Per Day (Bbls per day) | MMBTU / d	44,000
Weighted Average Differential ($ per bbl) | $ / MMBTU	(0.62)
Natural Gas Contract | WAHA - Basis Swaps 2020
Derivative [Line Items]
Bbls Per Day (Bbls per day) | MMBTU / d	17,000
Weighted Average Differential ($ per bbl) | $ / MMBTU	(0.75)
Swaps | Crude Oil Contract | NYMEX WTI - Swaps 2019
Derivative [Line Items]
Weighted Average Fixed Price ($ per bbl)	56.96
Swaps | Crude Oil Contract | NYMEX WTI - Swaption 2020
Derivative [Line Items]
Weighted Average Fixed Price ($ per bbl)	61.79
Swaps | Natural Gas Contract | NYMEX HH - Swaps 2020
Derivative [Line Items]
Weighted Average Fixed Price ($ per bbl) | $ / MMBTU	3.00
Collars | Crude Oil Contract | NYMEX WTI - Three-Way Collars 2019
Derivative [Line Items]
Weighted Average Short Put Price ($ per bbl)	49.35
Weighted Average Floor Price ($ per bbl)	59.35
Weighted Average Ceiling Price ($ per bbl)	72.25
Collars | Crude Oil Contract | ICE Brent - Three-Way Collars 2019
Derivative [Line Items]
Weighted Average Short Put Price ($ per bbl)	43.00
Weighted Average Floor Price ($ per bbl)	50.00
Weighted Average Ceiling Price ($ per bbl)	64.07
Collars | Crude Oil Contract | NYMEX WTI - Three-Way Swaps 2020
Derivative [Line Items]
Weighted Average Short Put Price ($ per bbl)	50.00
Weighted Average Floor Price ($ per bbl)	58.00
Weighted Average Ceiling Price ($ per bbl)	67.37