Other Income, Net (Tables)

6 Months Ended

Jun. 30, 2017

Other Income and Expenses [Abstract]

Other Income, Net

Other income, net consisted of the following:

	Three Months Ended June 30						Six Months Ended June 30
(Thousands of Dollars)	2017			2016			2017			2016
Interest income	$	2,107		$	984		$	5,907		$	5,054
Other nonoperating income	1,523			1,496			5,168			2,176
Insurance policy expense	(1,022		)	(920		)	(2,021		)	(1,420		)
Other income, net	$	2,608		$	1,560		$	9,054		$	5,810