Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.19.3.a.u2
Commitments and Contingencies - Additional Information (Detail)
$ in Thousands
12 Months Ended
Jan. 01, 2020
bbl
Dec. 31, 2019
USD ($)
bbl
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Commitments and Contingencies Disclosure [Line Items]        
Commitment length   5 years    
Number of drilling rigs   2    
Minimum commitment | bbl   8,000    
Estimated Litigation Liability, Current   $ 300    
Asset retirement obligations   4,934 $ 4,314 $ 3,286
Environmental Compliance        
Commitments and Contingencies Disclosure [Line Items]        
Asset retirement obligations   4,900    
Gathering and Intermediate Transportation        
Commitments and Contingencies Disclosure [Line Items]        
Contractual Commitments Future Minimum Payments Due   102,599    
Contractual Commitments Future Minimum Payments Due Current   $ 12,962    
Subsequent Event [Member]        
Commitments and Contingencies Disclosure [Line Items]        
Term of drilling rig agreement 1 year      
Period to give notice to termination drilling rig agreement 30 days      
Minimum commitment | bbl 0