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Asset Retirement Obligation (Tables) | 9 Months Ended
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Sep. 30, 2013
Schedule of Asset Retirement Obligation | Following is a summary of activity recorded during the first nine months of 2013 and 2012:
In thousands |  | 2013 |  |  | 2012 |
Balance at January 1, |  | $ | 8,882 |  |  | $ | 9,679 |
Accretion |  |  | 234 |  |  |  | 347 |
Payments |  |  | (2,719 | ) |  |  | (945 | )
Gain |  |  | (1,255 | ) |  |  | — |
Balance at September 30, |  | $ | 5,142 |  |  | $ | 9,081 |
Asset Retirement Obligation [Member] |
Schedule of Asset Retirement Obligation | The following table summarizes the line items in the accompanying condensed consolidated balance sheets where the asset retirement obligations are recorded:
In millions |  | September 30 2013 |  |  | December 31 2012 |
Other current liabilities |  | $ | 1.2 |  |  | $ | 3.6 |
Other long-term liabilities |  |  | 3.9 |  |  |  | 5.3 |
Total |  | $ | 5.1 |  |  | $ | 8.9 |

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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