Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2016

Stockholders' Equity Note [Abstract]

Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax

Changes in accumulated other comprehensive loss, net of tax, for the years ended Dec. 31, 2016 and 2015 were as follows:

	Gains and Losses on Cash Flow Hedges
(Thousands of Dollars)	Year Ended Dec. 31, 2016			Year Ended Dec. 31, 2015
Accumulated other comprehensive loss at Jan. 1	$	(209	)	$	(285	)
Losses reclassified from net accumulated other comprehensive loss	76			76
Net current period other comprehensive income	76			76
Accumulated other comprehensive loss at Dec. 31	$	(133	)	$	(209	)

Reclassifications out of Accumulated Other Comprehensive Loss

Reclassifications from accumulated other comprehensive loss for the years ended Dec. 31, 2016 and 2015 were as follows:

	Amounts Reclassified from Accumulated Other Comprehensive Loss
(Thousands of Dollars)	Year Ended Dec. 31, 2016				Year Ended Dec. 31, 2015
Losses on cash flow hedges:
Interest rate derivatives	$	127		(a)	$	127		(a)
Total, pre-tax	127				127
Tax benefit	(51		)		(51		)
Total amounts reclassified, net of tax	$	76			$	76

^(a)  Included in interest charges.