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OTHER INCOME AND EXPENSE (Tables) | 12 Months Ended
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Dec. 31, 2018
Other Income and Other Expense Disclosure [Text Block] | The following table sets forth the components of other income and other expense for the periods indicated:
|  | Years Ended December 31, |
|  | 2018 |  | 2017 |  | 2016 |
|  | (Thousands of dollars)
Net periodic benefit cost other than service cost |  | $ | (8,824 | ) |  | $ | (17,252 | ) |  | $ | (19,827 | ) |
Other, net |  | (2,535 | ) |  | 2,727 |  |  | (43 | ) |
Total other expense, net |  | $ | (11,359 | ) |  | $ | (14,525 | ) |  | $ | (19,870 | ) |
14. | OTHER INCOME AND OTHER EXPENSE
The following table sets forth the components of other income and other expense for the periods indicated:
|  | Years Ended December 31, |
|  | 2018 |  | 2017 |  | 2016 |
|  | (Thousands of dollars)
Net periodic benefit cost other than service cost |  | $ | (8,824 | ) |  | $ | (17,252 | ) |  | $ | (19,827 | ) |
Other, net |  | (2,535 | ) |  | 2,727 |  |  | (43 | ) |
Total other expense, net |  | $ | (11,359 | ) |  | $ | (14,525 | ) |  | $ | (19,870 | ) |

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -URI http://asc.fasb.org/topic&trid=2122503 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI http://asc.fasb.org/topic&trid=49130413 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration