Rendering

Component: (Network and Table)
Network
2419402 - Disclosure - Asset retirement obligations ('ARO') (Details)
(http://www.centuryca.com/role/AssetRetirementObligationsAroDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000949157 (http://www.sec.gov/CIK)
Asset Retirement Obligation Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Asset Retirement Obligation Disclosure [Abstract]
 
 
Asset Retirement Obligation [Roll Forward]
 
 
Beginning balance, ARO liability
35,165,000  
36,950,000  
Additional ARO liability incurred
1,272,000  
3,797,000  
ARO liabilities settled
(1,930,000) 
(5,514,000) 
Accretion expense
1,903,000  
1,818,000  
Adjustments
(992,000) 
(1,886,000) 
Ending balance, ARO liability
35,418,000  
 
35,165,000