Other Comprehensive Income

12 Months Ended

Dec. 31, 2016

Stockholders' Equity Note [Abstract]

Other Comprehensive Income

14. Other Comprehensive Income

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

	Year Ended Dec. 31, 2016
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at Jan. 1	$	(23,836	)	$	—		$	(23,836	)
Other comprehensive loss before reclassifications	—			(223		)	(223		)
Losses reclassified from net accumulated other comprehensive loss	1,056			3			1,059
Net current period other comprehensive income (loss)	1,056			(220		)	836
Accumulated other comprehensive loss at Dec. 31	$	(22,780	)	$	(220	)	$	(23,000	)

	Year Ended Dec. 31, 2015
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges
Accumulated other comprehensive loss at Jan. 1	$	(23,878	)
Other comprehensive loss before reclassifications	(30		)
Losses reclassified from net accumulated other comprehensive loss	72
Net current period other comprehensive income	42
Accumulated other comprehensive loss at Dec. 31	$	(23,836	)

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 (gains) on cash flow hedges:
Interest rate derivatives	$	1,618		(a)	$	54		(a)
Vehicle fuel derivatives	86			(b)	57			(b)
Total, pre-tax	1,704				111
Tax benefit	(648		)		(39		)
Total, net of tax	1,056				72
Defined benefit pension and postretirement losses (gains):
Amortization of net losses	5			(c)	—
Total, pre-tax	5				—
Tax benefit	(2		)		—
Total, net of tax	3				—
Total amounts reclassified, net of tax	$	1,059			$	72

^(a)  Included in interest charges.

^(b)  Included in O&M expenses.

^(c)  Included in the computation of net periodic pension and postretirement benefit costs. See Note 8 for details regarding these benefit plans.