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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2016
Asset Retirement Obligation Disclosure [Abstract] |
Summary of Asset Retirement Obligation | Changes to the Company’s asset retirement obligation are summarized below:
|  | December 31, |  | December 31,
|  | 2016 |  | 2015
|  | (thousands of dollars)
Balance, beginning of period |  | $ 4,468 |  | $ 4,196
Liabilities settled |  | (54) |  | (178)
Accretion expense |  | 480 |  | 450
Balance, end of period |  | 4,894 |  | 4,468
Less: Included in liabilities held for sale |  | (105) |  | (105)
Less: Current portion |  | (121) |  | (121)
Non-current portion |  | $ 4,668 |  | $ 4,242

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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