Other Income, Net (Tables)

12 Months Ended

Dec. 31, 2016

Other Income and Expenses [Abstract]

Other Income, Net

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

(Thousands of Dollars)	2016			2015			2014
Interest income	$	244		$	332		$	368
Other nonoperating income	208			789			321
Insurance policy expense	22			(228		)	(409		)
Other nonoperating expense	(13		)	(10		)	(10		)
Other income, net	$	461		$	883		$	270