Other Income, Net (Tables)

3 Months Ended

Mar. 31, 2015

Other Income and Expenses [Abstract]

Other Income, Net

Other income, net consisted of the following:

	Three Months Ended March 31
(Thousands of Dollars)	2015			2014
Interest income	$	233		$	489
Other nonoperating income	777			685
Insurance policy expense	(323		)	(367		)
Other nonoperating expense	—			(10		)
Other income, net	$	687		$	797