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OTHER INCOME AND OTHER EXPENSE (Notes)
 9 Months Ended
Sep. 30, 2025
Other Income and Other Expense Disclosure [Text Block] OTHER INCOME AND OTHER EXPENSE
The following table sets forth the components of other income and other expense for the periods indicated:

Three Months EndedNine Months Ended
September 30,September 30,
2025202420252024
(Thousands of dollars)
Net periodic benefit credit other than service cost
$289 $825 $977 $2,381 
Earnings on investments associated with nonqualified deferred compensation plans
1,859 2,097 4,068 4,798 
Unrealized gain (loss) on marketable equity securities146 — 330 — 
Other income (expense), net69 60 78 288 
Total other income, net
$2,363 $2,982 $5,453 $7,467