Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Detail)

v3.19.3.a.u2
Long-Term Debt - Additional Information (Detail) - USD ($)
$ in Thousands
 4 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
May 03, 2019
Debt Disclosure [Line Items]          
Interest on borrowings and related fees $ 6,995 $ 36,593 $ 32,164    
Amortization of debt issuance costs 2 1,961 2,611 2,736    
Interest Paid, Capitalized, Investing Activities (2,725) (4,136) (9,118)    
Interest Expense $ 6,392 35,811 26,462 $ 6,392  
Debt Issuance Costs, Line of Credit Arrangements, Gross   $ 2,600 900    
Line of credit, redetermination period   6 months      
Write off of Deferred Debt Issuance Cost       $ 800  
Line of credit , extension period   91 days      
Required covenant, current ratio   1.00      
Term of credit facility   5 years      
Second Lien Facility   $ 200,000 $ 200,000    
Proceeds from Debt, Net of Issuance Costs   187,800      
Debt Instrument, Unamortized Discount   4,000      
Unamortized Debt Issuance Expense   $ 8,200      
Debt Instrument, Discounted Percentage   98.00%      
Revolving Credit Facility [Member]          
Debt Disclosure [Line Items]          
Maximum borrowing capacity   $ 500,000     $ 1,000,000
Line of Credit Facility, Interest Rate at Period End   3.75%      
Required covenant, debt to EBITDAX ratio   4.00      
Revolving Credit Facility [Member] | Minimum [Member]          
Debt Disclosure [Line Items]          
Credit facility interest rate option one, applicable margin rate over Adjusted LIBOR   0.50%      
Revolving Credit Facility [Member] | Maximum [Member]          
Debt Disclosure [Line Items]          
Credit facility interest rate option one, applicable margin rate over Adjusted LIBOR   1.50%      
Credit facility interest rate option two, applicable margin rate   2.50%      
Revolving credit facility          
Debt Disclosure [Line Items]          
Letter of credit amount outstanding   $ 400      
Revolving credit facility | Letter of Credit          
Debt Disclosure [Line Items]          
Maximum borrowing capacity   $ 25,000      
Letter of Credit | Minimum [Member]          
Debt Disclosure [Line Items]          
Commitment fees for undrawn credit facility   0.375%      
Letter of Credit | Maximum [Member]          
Debt Disclosure [Line Items]          
Commitment fees for undrawn credit facility   0.50%      
Second Lien Facility [Member]          
Debt Disclosure [Line Items]          
Credit facility interest rate option one, applicable margin rate over Adjusted LIBOR   7.00%      
Credit facility interest rate option two, applicable margin rate   6.00%      
Second Lien Facility, Initial Interest Rate   8.34%      
Second Lien Facility, Effective Interest Rate   9.89%      
Year 3 [Member]          
Debt Disclosure [Line Items]          
Prepayment Premium   101.00%      
Prepayment Premium, Change in Control   101.00%