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Changes in Cumulative Other Comprehensive Loss (Tables)
 3 Months Ended
Mar. 31, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Changes in Cumulative Other Comprehensive Loss
The following tables summarize the changes in Cumulative other comprehensive loss for the three months ended March 31, 2015 and 2014:
(Thousands of dollars)
 
 
 
 
 
 
 
 
Foreign Currency Translation Adjustments
 
Net Actuarial (Losses) Gains and Prior Service Costs Recognized for Employee Benefit Plans
 
Unrealized Net Gains (Losses) on Available-for-Sale Securities
 
Total Cumulative Other Comprehensive Loss
Balance at December 31, 2014
$
(354,384
)
 
$
(118,167
)
 
$
593

 
$
(471,958
)
Other comprehensive loss before reclassifications(1)
(56,776
)
 
 
 
(132
)
 
(56,908
)
Amounts reclassified from other comprehensive (loss) income(2)


 
570

 
(9
)
 
561

Net other comprehensive (loss) income
(56,776
)
 
570

 
(141
)
 
(56,347
)
Balance at March 31, 2015
$
(411,160
)
 
$
(117,597
)
 
$
452

 
$
(528,305
)

(1) Net of taxes of $81 for unrealized net losses on available-for-sale securities.
(2) Net of taxes of $(206) for net actuarial losses and prior service costs recognized for employee benefit plans and $4 for realized gains on the sale of available-for-sale securities.
(Thousands of dollars)
 
 
 
 
 
 
 
 
Foreign Currency Translation Adjustments
 
Net Actuarial Losses and Prior Service Costs Recognized for Employee Benefit Plans
 
Unrealized Net Gains (Losses) on Available-for-Sale Securities
 
Total Cumulative Other Comprehensive Loss
Balance at December 31, 2013
$
(250,942
)
 
$
(70,611
)
 
$
509

 
$
(321,044
)
Other comprehensive loss before reclassifications(3)
(8,055
)
 
(570
)
 
(65
)
 
(8,690
)
Amounts reclassified from other comprehensive (loss) income(4)
 
 
504

 
(17
)
 
487

Net other comprehensive (loss) income
(8,055
)
 
(66
)
 
(82
)
 
(8,203
)
Balance at March 31, 2014
$
(258,997
)
 
$
(70,677
)
 
$
427

 
$
(329,247
)

(3) Net of taxes of $244 for net actuarial losses and prior service costs recognized for employee benefit plans and $41 for unrealized net losses on available-for-sale securities.
(4) Net of taxes of $(207) for net actuarial losses and prior service costs recognized for employee benefit plans and $11 for realized gains on the sale of available-for-sale securities.