Other Income, Net (Tables)

12 Months Ended

Dec. 31, 2015

Other Income and Expenses [Abstract]

Other Income, Net

Other (expense) income, net for the years ended Dec. 31 consisted of the following:

(Thousands of Dollars)	2015			2014			2013
Interest income	$	129		$	246		$	663
Other nonoperating income	11			183			9
Insurance policy expense	(40		)	(488		)	(532		)
Other nonoperating expense	(106		)	—			—
Other (expense) income, net	$	(6	)	$	(59	)	$	140