Other Income, Net (Tables)

12 Months Ended

Dec. 31, 2015

Other Income and Expenses [Abstract]

Other Income, Net

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

(Thousands of Dollars)	2015			2014			2013
Interest income	$	332		$	368		$	538
Other nonoperating income	789			321			152
Insurance policy expense	(228		)	(409		)	(427		)
Other nonoperating expense	(10		)	(10		)	(10		)
Other income, net	$	883		$	270		$	253