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Long-Term Debt (Details) - USD ($)
6 Months Ended
Jun. 28, 2019
Feb. 25, 2019
Sep. 13, 2016
Jun. 30, 2020
Dec. 31, 2019
Sep. 03, 2016
Long-term debt            
Net unamortized debt issuance costs       $ (22,065,000) $ (23,101,000)  
Total long-term debt       3,088,785,000 2,892,249,000  
New revolving credit facility            
Long-term debt            
Long-term debt       1,155,000,000 959,500,000  
New revolving credit facility | Antero Midstream Partners            
Long-term debt            
Long-term debt       1,200,000,000 960,000,000  
Maximum borrowing capacity       2,130,000,000    
Outstanding balance       $ 0 $ 0  
Weighted average interest rate (as a percent)       1.69% 3.15%  
New revolving credit facility | Not Investment Grade Period | Minimum            
Long-term debt            
Commitment fees on the unused portion (as a percent)       0.25%    
New revolving credit facility | Not Investment Grade Period | Maximum            
Long-term debt            
Commitment fees on the unused portion (as a percent)       0.375%    
5.375% Senior Notes due 2024            
Long-term debt            
Long-term debt       $ 652,600,000 $ 652,600,000  
5.375% Senior Notes due 2024 | Finance Corp and together with Antero Midstream Partners            
Long-term debt            
Face amount     $ 650,000,000      
Interest rate (as a percent)     5.375% 5.375%   5.375%
Debt instrument redemption percentage upon change of control     101.00%      
5.375% Senior Notes due 2024 | Redemption period one | Finance Corp and together with Antero Midstream Partners            
Long-term debt            
Debt instrument redemption percentage     104.031%      
5.375% Senior Notes due 2024 | Redemption period two | Finance Corp and together with Antero Midstream Partners            
Long-term debt            
Debt instrument redemption percentage     100.00%      
5.75% Senior Notes Due 2027            
Long-term debt            
Long-term debt       $ 653,250,000 $ 653,250,000  
Face amount   $ 650,000,000        
Interest rate (as a percent)   5.75%   5.75% 5.75%  
Debt instrument redemption percentage upon change of control   101.00%        
5.75% Senior Notes Due 2027 | Maximum            
Long-term debt            
Percent of aggregate principal amount that can be redeemed   35.00%        
5.75% Senior Notes Due 2027 | Redemption period one            
Long-term debt            
Debt instrument redemption percentage   102.875%        
5.75% Senior Notes Due 2027 | Redemption period two            
Long-term debt            
Debt instrument redemption percentage   100.00%        
5.75% Senior Notes Due 2027 | Redemption period three            
Long-term debt            
Debt instrument redemption percentage   105.75%        
Debt instrument redemption percentage with payment of premium and interest   100.00%        
5.75% Senior Notes Due 2028            
Long-term debt            
Long-term debt       $ 650,000,000 $ 650,000,000  
Face amount $ 650,000,000          
Interest rate (as a percent) 5.75%     5.75% 5.75%  
Debt instrument redemption percentage upon change of control 101.00%          
5.75% Senior Notes Due 2028 | Maximum            
Long-term debt            
Percent of aggregate principal amount that can be redeemed 35.00%          
5.75% Senior Notes Due 2028 | Redemption period one            
Long-term debt            
Debt instrument redemption percentage 102.875%          
5.75% Senior Notes Due 2028 | Redemption period two            
Long-term debt            
Debt instrument redemption percentage 100.00%          
5.75% Senior Notes Due 2028 | Redemption period three            
Long-term debt            
Debt instrument redemption percentage 105.75%          
Debt instrument redemption percentage with payment of premium and interest 100.00%