Other Income, Net (Tables)

3 Months Ended

Mar. 31, 2017

Other Income and Expenses [Abstract]

Other Income, Net

Other income, net consisted of the following:

	Three Months Ended March 31
(Thousands of Dollars)	2017			2016
Interest income	$	3,800		$	4,070
Other nonoperating income	3,645			680
Insurance policy expense	(999		)	(500		)
Other income, net	$	6,446		$	4,250