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Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Jun. 30, 2017
Accumulated Other Comprehensive Loss [Abstract] |
Components of Accumulated Other Comprehensive Loss |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  | Deferred |  |
﻿ |  |  |  |  |  | Loss on |  |
﻿ |  | Foreign |  | Retirement and |  | Interest |  |
﻿ |  | Currency |  | Postretirement |  | Rate |  |
﻿ |  | Translation |  | Benefit Plan |  | Derivative |  |
﻿(Thousands of dollars) |  | Gains (Losses)1 |  | Adjustments 1 |  | Hedges 1 |  | Total 1
﻿Balance at December 31, 2016 | $ | (446,555) |  | (171,305) |  | (10,352) |  | (628,212)
﻿2017 components of other comprehensive income (loss): |  |  |  |  |  |  |  |
﻿Before reclassifications to income |  | 92,884 |  | – |  | – |  | 92,884
﻿Reclassifications to income |  | – |  | 4,773 | 2 | 963 | 3 | 5,736
﻿Net other comprehensive income |  | 92,884 |  | 4,773 |  | 963 |  | 98,620
﻿Balance at June 30, 2017 | $ | (353,671) |  | (166,532) |  | (9,389) |  | (529,592)
﻿ 1 All amounts are presented net of income taxes. 2 Reclassifications before taxes of $7,354 for th e six-month period ended June 30, 201 7 are included in the computation of net periodic benefit expense. See Note G for additional information. Related income taxes of $2,581 for the six-month period ended June 30, 201 7 are included in Income tax expense. 3 Reclassifications before taxes of $1,482 for the six-month period ended June 30, 201 7 are included in Interest expense. Related income taxes of $519 for the six-month period ended June 30, 201 7 are included in Income tax expense.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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