Equity-Based Compensation - Phantom Unit Awards (Details) - Antero Midstream Partners Phantom Unit Awards $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Number of units
Total granted and unvested at the beginning of the period (in shares) | shares	1,042,963
Granted (in shares) | shares	260,847
Vested (in shares) | shares	(577,566)
Forfeited (in shares) | shares	(143,244)
Total awarded and unvested at the end of the period (in shares) | shares	583,000
Weighted average grant date fair value
Total granted and unvested at the beginning of the period (in dollars per share) | $ / shares	$ 28.69
Granted (in dollars per share) | $ / shares	25.84
Vested (in dollars per share) | $ / shares	28.63
Forfeited (in dollars per share) | $ / shares	28.08
Total awarded and unvested at the end of the period (in dollars per share) | $ / shares	$ 27.63
Aggregate intrinsic value
Outstanding at the beginning of the period | $	$ 30,288
Outstanding at the end of the period | $	12,470
Additional equity compensation to be recognized over the remaining period | $	$ 12,000
Weighted average period for recognizing unrecognized stock-based compensation expense	2 years 6 months