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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of Accumulated other comprehensive loss on the Consolidated Balance Sheets at December 31, 2019 and December 31, 2018 and the changes during 2019 and 2018 are presented net of taxes in the following table.
(Thousands of dollars)
Foreign
Currency
Translation
Gains (Losses)
 
Retirement and
Postretirement
Benefit Plan
Adjustments
  
Deferred
Loss on
Interest
Rate
Derivative
Hedges
  
Total
Balance at December 31, 2017
(274,830
)
 
(178,987
)
 
(8,426
)
 
(462,243
)
2017 components of other comprehensive income (loss):
 
 
 
 
 
 
 
Before reclassifications to income
(145,022
)
 
(16,839
)
 
(1,815
)
 
(163,676
)
Reclassifications to income
—

 
13,790

 
2,342

 
16,132

Net other comprehensive income
(145,022
)
 
(3,049
)
 
527

 
(147,544
)
Balance at December 31, 2018
(419,852
)
 
(182,036
)
 
(7,899
)
 
(609,787
)
2018 components of other comprehensive income (loss):
 
 
 
 
 
 
 
Before reclassifications to income
66,600

 
(47,264
)
 
—

 
19,336

Reclassifications to income
—

 
11,285

¹ 
5,005

² 
16,290

Net other comprehensive income (loss)
66,600

 
(35,979
)
 
5,005

 
35,626

Balance at December 31, 2019
$
(353,252
)
 
(218,015
)
 
(2,894
)
 
(574,161
)
1 Reclassifications before taxes of $14,380 and $17,313 are included in the computation of net periodic benefit expense in 2019 and 2018, respectively.  See Note L for additional information.  Related income taxes of $3,095 and $3,523 are included in income tax expense in 2019 and 2018, respectively.
2 Reclassifications before taxes of $6,335 and $2,963 are included in Interest expense in 2019 and 2018.  Related income taxes of $1,330 and $622 are included in income tax expense in 2019 and 2018.  See Note M for additional information.