| Component: (Network and Table) | |
|---|---|
| Network | 100530 - Disclosure - Asset Retirement Obligation (Details) (http://www.gastar.com/20161231/taxonomy/role/DisclosureAssetRetirementObligationDetails)  | 
| Table | (Implied) | 
| Reporting Entity [Axis] | 0001431372 (http://www.sec.gov/CIK) | 
| Asset Retirement Obligation Disclosure [Abstract] | Period [Axis] | ||
|---|---|---|---|
2016-01-01 - 2016-12-31  | 2015-01-01 - 2015-12-31  | 2014-01-01 - 2014-12-31  | |
Asset Retirement Obligation Disclosure [Abstract]  | |||
Asset retirement obligation, beginning of year  | |||
Liabilities incurred during period  | |||
Liabilities settled during period  | (  | (  | (  | 
Accretion expense  | 368,000    | 502,000    | 506,000    | 
Revision in previous estimates and other  | |||
Deletions related to property disposals  | (  | (  | (  | 
Asset retirement obligation, end of year  | 6,086,000    | 5,557,000    | |