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Derivative Instruments - Schedule of Outstanding Commodity Derivative Instruments (Details)
$ in Thousands
 1 Months Ended 9 Months Ended
Nov. 06, 2019
$ / bbl
bbl
Sep. 30, 2019
USD ($)
MMBTU
$ / bbl
bbl
Derivative [Line Items]    
Fair value assets (liabilities) | $   $ 61,079
NYMEX WTI | Crude Oil | 2019 Fixed price swaps    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   2,275,000
Average swap price (in dollars per barrel)   57.49
Fair value assets (liabilities) | $   $ 5,744
NYMEX WTI | Crude Oil | 2019 Two-way collar    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   1,274,000
Average floor price (in dollars per barrel)   58.07
Average ceiling price (in dollars per barrel)   74.64
Fair value assets (liabilities) | $   $ 5,002
NYMEX WTI | Crude Oil | 2019 Three-way collar    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   1,092,000
Average sub-floor price (in dollars per barrel)   40.00
Average floor price (in dollars per barrel)   51.57
Average ceiling price (in dollars per barrel)   65.40
Fair value assets (liabilities) | $   $ 768
NYMEX WTI | Crude Oil | 2020 Fixed price swaps    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   3,418,000
Average swap price (in dollars per barrel)   58.69
Fair value assets (liabilities) | $   $ 21,461
NYMEX WTI | Crude Oil | 2020 Two-way collar    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   2,378,000
Average floor price (in dollars per barrel)   52.11
Average ceiling price (in dollars per barrel)   62.98
Fair value assets (liabilities) | $   $ 7,609
NYMEX WTI | Crude Oil | 2020 Three-way collar    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   4,574,000
Average sub-floor price (in dollars per barrel)   40.00
Average floor price (in dollars per barrel)   53.26
Average ceiling price (in dollars per barrel)   64.48
Fair value assets (liabilities) | $   $ 15,871
NYMEX WTI | Crude Oil | 2021 Fixed price swaps    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   93,000
Average swap price (in dollars per barrel)   58.85
Fair value assets (liabilities) | $   $ 770
NYMEX WTI | Crude Oil | 2021 Two-way collar    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   62,000
Average floor price (in dollars per barrel)   50.50
Average ceiling price (in dollars per barrel)   60.70
Fair value assets (liabilities) | $   $ 245
NYMEX WTI | Crude Oil | 2021 Three-way collar    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   734,000
Average sub-floor price (in dollars per barrel)   40.00
Average floor price (in dollars per barrel)   51.26
Average ceiling price (in dollars per barrel)   64.05
Fair value assets (liabilities) | $   $ 2,101
NYMEX WTI | Subsequent Event | Crude Oil | 2020 Fixed price swaps    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl 2,005,200  
NYMEX WTI | Subsequent Event | Crude Oil | 2021 Two-way collar    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl 74,400  
Average floor price (in dollars per barrel) 54.25  
Houston NYMEX WTI | Crude Oil | 2019 Basis swaps    
Derivative [Line Items]    
Total notional amount of oil (in Bbls) | bbl   90,000
Average swap price (in dollars per barrel)   4.55
Fair value assets (liabilities) | $   $ 142
NYMEX HH | Natural Gas | 2019 Fixed price swaps    
Derivative [Line Items]    
Total notional amount of natural gas (in MMBtu) | MMBTU   2,760,000
Average swap price (in dollars per barrel)   2.92
Fair value assets (liabilities) | $   $ 1,366