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Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2018
Accumulated Other Comprehensive Loss [Abstract] |
Components of Accumulated Other Comprehensive Loss |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  | Deferred |  |
﻿ |  |  |  | Retirement |  | Loss on |  |
﻿ |  | Foreign |  | and |  | Interest |  |
﻿ |  | Currency |  | Postretirement |  | Rate |  |
﻿ |  | Translation |  | Benefit Plan |  | Derivative |  |
﻿(Thousands of dollars) |  | Gains (Losses) |  | Adjustments |  | Hedges |  | Total
﻿Balance at December 31, 2017 | $ | (274,830) |  | (178,987) |  | (8,426) |  | (462,243)
﻿2018 components of other comprehensive income (loss): |  |  |  |  |  |  |  |
﻿ Before reclassifications to income and retained earnings |  | (52,275) |  | (32,159) |  | (1,815) |  | (86,249)
﻿ Reclassifications to income |  | – |  | 3,170 | 1 | 585 | 2 | 3,755
﻿Net other comprehensive income |  | (52,275) |  | (28,989) |  | (1,230) |  | (82,494)
﻿Balance at March 31, 2018 | $ | (327,105) |  | (207,976) |  | (9,656) |  | (544,737)
1Reclassifications before taxes of $4,041 are included in the computation of net periodic benefit expense for the three-month period ended March 31, 2018. See Note H for additional information. Related income taxes of $871 are included in Income tax expense (benefit) for the three-month period ended March 31, 2018. 2Reclassifications before taxes of $741 are included in Interest expense, net, for the three-month period ended March 31, 2018. Related income taxes of $156 are included in Income tax expense (benefit) for the three-month period ended March 31, 2018. See Note L for additional information.

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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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