Other Income, Net (Tables)

9 Months Ended

Sep. 30, 2017

Other Income and Expenses [Abstract]

Other Income, Net

Other income, net consisted of the following:

	Three Months Ended Sept. 30						Nine Months Ended Sept. 30
(Thousands of Dollars)	2017			2016			2017			2016
Interest income	$	1,422		$	162		$	2,406		$	451
Other nonoperating income	193			511			4,940			1,594
Insurance policy expense	(79		)	(129		)	(261		)	(205		)
Other nonoperating expense	—			—			—			(3		)
Other income, net	$	1,536		$	544		$	7,085		$	1,837