Rendering

Component: (Network and Table)
Network
2410402 - Disclosure - Asset Retirement Obligation - Schedule of Changes in Carrying Amount of Asset Retirement Obligation (Details)
(http://grantierra.com/role/AssetRetirementObligationScheduleOfChangesInCarryingAmountOfAssetRetirementObligationDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001273441 (http://www.sec.gov/CIK)
Asset Retirement Obligation Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-12-31
Asset Retirement Obligation Disclosure [Abstract]
 
 
 
Asset Retirement Obligation, Roll Forward Analysis
 
 
 
Balance, beginning of year
33,224,000  
35,812,000  
 
Settlements
(872,000) 
(6,317,000) 
 
Liabilities associated with assets sold
(3,257,000) 
0  
 
Liability incurred
2,606,000  
1,556,000  
 
Liabilities assumed in acquisitions (Note 3)
15,723,000  
0  
 
Accretion
2,789,000  
1,313,000  
 
Revisions in estimated liability
(6,856,000) 
860,000  
 
Balance, end of year
43,357,000  
 
33,224,000  
 
 
 
Asset retirement obligation - current
5,215,000  
2,146,000  
 
Asset retirement obligation - long-term
38,142,000  
31,078,000  
 
Balance, end of year
43,357,000  
 
33,224,000  
 
35,812,000