Contract Termination and Rig Stacking (Details) $ in Thousands	9 Months Ended
Sep. 30, 2015 USD ($)
Contract Termination and Rig Stacking Line Items
Contract termination and rig stacking	$ 10,902

Represents costs incurred for the buy-back and termination of firm contracts and the delay or cancelation of drilling contracts with third-party contractors.

No definition available.

Name:	ar_ContractTerminationAndRigStacking
Namespace Prefix:	ar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration