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Accumulated Other Comprehensive Loss (Tables)
 9 Months Ended
Sep. 30, 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, 2018 and September 30, 2019 and the changes during the nine-month period ended September 30, 2019, 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, 2018
$
(419,852
)
 
(182,036
)
 
(7,899
)
 
(609,787
)
2019 components of other comprehensive income (loss):
 
 
 
 
 
 
 
Before reclassifications to income and retained earnings
36,927

 
—

 
—

 
36,927

Reclassifications to income
—

 
8,277

¹
1,756

²
10,033

Net other comprehensive income (loss)
36,927

 
8,277

 
1,756

 
46,960

Balance at September 30, 2019
$
(382,925
)
 
(173,759
)
 
(6,143
)
 
(562,827
)

1 Reclassifications before taxes of $10,598 are included in the computation of net periodic benefit expense for the nine-month period ended September 30, 2019.  See Note H for additional information.  Related income taxes of $2,321 are included in Income tax expense (benefit) for the nine-month period ended September 30, 2019.
2 Reclassifications before taxes of $2,223 are included in Interest expense, net, for the nine-month period ended September 30, 2019.  Related income taxes of $467 are included in Income tax expense (benefit) for the nine-month period ended September 30, 2019.  See Note L for additional information.