Other Income, Net

9 Months Ended

Sep. 30, 2018

Other Income and Expenses [Abstract]

Other Income, Net

Other Expense, Net

Other expense, net consisted of the following:

	Three Months Ended Sept. 30						Nine Months Ended Sept. 30,
(Thousands of Dollars)	2018			2017			2018			2017
Interest income	$	473		$	296		$	771		$	488
Other nonoperating income	—			1			2			—
Other nonoperating expense	(1		)	—			—			—
Insurance policy expense	(11		)	(12		)	(35		)	(36		)
Benefits non-service cost	(1,487		)	(749		)	(3,250		)	(2,247		)
Other expense, net	$	(1,026	)	$	(464	)	$	(2,512	)	$	(1,795	)