|
2013 |
2012 |
|||||
|
(in thousands) |
||||||
|
Asset retirement obligation at January 1 |
$ |
100,637 |
$ |
37,693 | ||
|
Accretion of discount |
5,643 | 2,394 | ||||
|
Obligations incurred |
22,241 | 23,327 | ||||
|
Obligations settled/removed |
(2,341) | (8,804) | ||||
|
Revisions of estimates |
7,366 | 46,027 | ||||
|
Asset retirement obligation at December 31 |
$ |
133,546 |
$ |
100,637 | ||
|
Current liability |
5,549 | 4,091 | ||||
|
Long-term liability |
127,997 | 96,546 | ||||
|
Asset retirement obligation at December 31 |
$ |
133,546 |
$ |
100,637 | ||