Annual report pursuant to Section 13 and 15(d)

Equity Based Compensation (Details)

v3.8.0.1
Equity Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Additional disclosures      
Equity-based compensation $ 27,283 $ 26,049 $ 22,470
Midstream LTIP      
Additional disclosures      
Number of stock-based compensation awards authorized 10,000,000    
Unamortized expense $ 25,000    
Number of shares available for future grant under the Plan 7,864,621    
Weighted average period for recognizing unrecognized stock-based compensation expense 2 years    
Restricted unit and phantom unit awards      
Number of units      
Total awarded and unvested at the beginning of the period (in shares) 1,331,961    
Granted (in shares) 377,660    
Vested (in shares) (558,525)    
Forfeited (in shares) (108,133)    
Total awarded and unvested at the end of the period (in shares) 1,042,963 1,331,961  
Weighted average grant date fair value      
Total awarded and unvested at the beginning of the period (in dollars per unit) $ 27.31    
Granted (in dollars per unit) 32.52    
Vested (in dollars per unit) 28.00    
Forfeited (in dollars per unit) 28.63    
Total awarded and unvested at the end of the period (in dollars per unit) $ 28.69 $ 27.31  
Aggregate intrinsic value      
Total awarded and unvested at the beginning of the period $ 41,131    
Total awarded and unvested at the end of the period 30,288 $ 41,131  
Additional disclosures      
Minimum statutory tax withholdings for restricted and phantom units 5,900    
Various equity based compensation plans | Antero Resources      
Additional disclosures      
Unamortized expense $ 112,000