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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Sep. 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) |  | Adjustments |  | Hedges |  | Total
﻿Balance at December 31, 2016 | $ | (446,555) |  | (171,305) |  | (10,352) |  | (628,212)
﻿2017 components of other comprehensive income (loss): |  |  |  |  |  |  |  |
﻿Before reclassifications to income |  | 194,094 |  | 3 |  | – |  | 194,097
﻿Reclassifications to income |  | – |  | 7,166 | 1 | 1,445 | 2 | 8,611
﻿Net other comprehensive income |  | 194,094 |  | 7,169 |  | 1,445 |  | 202,708
﻿Balance at September 30, 2017 | $ | (252,461) |  | (164,136) |  | (8,907) |  | (425,504)
﻿ 1 Reclassifications before taxes of $11,039 for the nine-month period ended September 30, 2017 are inc luded in the computation of net periodic benefit expense. See Note G for additional information. Related income taxes of $3,873 for the nine-month period ended September 30, 2017 are included in Income tax expense. 2 Reclassifications before taxes of $2,222 for the nine-month period ended September 30, 2017 are included in Interest expense, net. Related income taxes of $777 for the nine-month period ended September 30, 2017 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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