Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income tax expense from continuing operations
Current income tax expense (benefit)	$ (10,984)
Deferred income tax expense (benefit)	(485,392)	$ 575,890	$ 445,672
Total income tax expense from continuing operations	$ (496,376)	$ 575,890	$ 445,672
U.S. Statutory federal income tax rate (as a percent)	35.00%	35.00%	35.00%
Reconciliation of income tax expense from continuing operations differs from the amount that would be computed by applying the U.S. statutory federal income tax rate to consolidated income
Federal income tax expense	$ (436,038)	$ 544,560	$ 391,754
State income tax expense , net of federal benefit	(20,364)	26,983	25,545
Nondeductible stock compensation	3,691	16,441	29,141
Noncontrolling interest in Antero Midstream Partners LP	(34,780)	(13,521)	(787)
Change in valuation allowance	(10,852)	570	(120)
Other	1,967	857	139
Total income tax expense from continuing operations	(496,376)	575,890	445,672
Income tax expense (benefit) allocated to continuing and discontinued operations
Total income tax expense from continuing operations	(496,376)	575,890	445,672
Discontinued operations and sale of discontinued operations			1,354
Total income tax expense (benefit)	(496,376)	575,890	$ 447,026
Deferred tax assets:
Net operating loss carryforwards	562,355	521,617
Minimum tax credit carryforward		11,000
Equity based compensation	20,344	16,130
Other	16,483	18,633
Total deferred tax assets	599,182	567,380
Valuation allowance	(16,357)	(27,209)
Net deferred tax assets	582,825	540,171
Deferred tax liabilities:
Unrealized gains on derivative instruments	605,487	1,167,983
Oil and gas properties	866,003	708,664
Investment in Antero Midstream Partners LP	54,052	34,210
Other	7,500
Total deferred tax liabilities	1,533,042	1,910,857
Net deferred tax liabilities	$ (950,217)	$ (1,370,686)