| Component: (Network and Table) | |
|---|---|
| Network | 40802 - Disclosure - Asset Retirement Obligations (Summary Of Changes In Asset Retirement Obligations) (Details) (http://www.altamesa.net/role/DisclosureAssetRetirementObligationsSummaryOfChangesInAssetRetirementObligationsDetails)  | 
| Table | (Implied) | 
| Reporting Entity [Axis] | 0001518403 (http://www.sec.gov/CIK) | 
| Asset Retirement Obligations [Abstract] | Period [Axis] | |||
|---|---|---|---|---|
2016-01-01 - 2016-12-31  | 2015-01-01 - 2015-12-31  | 2014-01-01 - 2014-12-31  | 2013-12-31  | |
Asset Retirement Obligations [Abstract]  | ||||
Balance, beginning of year  | ||||
Liabilities incurred  | ||||
Liabilities assumed with acquired producing properties  | ||||
Liabilities settled  | (  | (  | (  | |
Liabilities transferred in sales of properties  | (  | (  | (  | |
Revisions to estimates  | (  | |||
Accretion expense  | 2,174,000    | 2,076,000    | 2,198,000    | |
Balance, end of period  | 61,220,000    | 62,872,000    | 56,023,000    | |
Less: Current portion  | 376,000    | 729,000    | ||
Long-term portion  | 61,128,000    | 60,491,000    | ||