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Accounts Payable and Accrued Liabilities | 12 Months Ended
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Dec. 31, 2015
Payables and Accruals [Abstract] |
Accounts Payable and Accrued Liabilities | Accounts Payable and Accrued Liabilities Trade accounts payable and accrued liabilities consisted of the following:
| December 31,
(Thousands of dollars) | 2015 |  | 2014
Trade accounts payable | $ | 226,769 |  |  | $ | 227,113 |
Excise taxes/withholdings payable | 75,704 |  |  | 71,273 |
Accrued insurance obligations | 23,347 |  |  | 19,280 |
Other | 64,521 |  |  | 63,605 |
Accounts payable and accrued liabilities | $ | 390,341 |  |  | $ | 381,271 |

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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