Year Ended December 31, |
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2013 |
2012 |
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(Dollars in thousands) |
||||||||
Balance at beginning of year |
$ | 19,289 | $ | 21,284 | ||||
Revisions in estimated cash flows |
(2,742 | ) | (3,696 | ) | ||||
Liabilities incurred |
588 | — | ||||||
Accretion expense |
1,544 | 1,701 | ||||||
Balance at end of year |
$ | 18,679 | $ | 19,289 |