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OTHER INCOME AND OTHER EXPENSE (Notes)
6 Months Ended
Jun. 30, 2018
Other Income and Other Expense Disclosure [Text Block]
11.
OTHER INCOME AND OTHER EXPENSE

The following table sets forth the components of other income and other expense for the periods indicated:
 
 
Three Months Ended
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2018
 
2017
 
2018
 
2017
 
 
(Thousands of dollars)
Net periodic benefit cost other than service cost
 
$
(2,403
)
 
$
(4,313
)
 
$
(4,137
)
 
$
(8,626
)
Other, net
 
209

 
413

 
(221
)
 
1,319

Total other income (expense), net
 
$
(2,194
)
 
$
(3,900
)
 
$
(4,358
)
 
$
(7,307
)