Other Comprehensive Income

6 Months Ended

Jun. 30, 2017

Stockholders' Equity Note [Abstract]

Other Comprehensive Income

Other Comprehensive Income

Changes in accumulated other comprehensive loss, net of tax, for the three and six months ended June 30, 2017 and 2016 were as follows:

	Three Months Ended June 30, 2017
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at April 1	$	(669	)	$	(597	)	$	(1,266	)
Losses reclassified from net accumulated other comprehensive loss	10			15			25
Net current period other comprehensive income	10			15			25
Accumulated other comprehensive loss at June 30	$	(659	)	$	(582	)	$	(1,241	)

	Three Months Ended June 30, 2016
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at April 1	$	(775	)	$	(452	)	$	(1,227	)
Other comprehensive loss before reclassifications	—			11			11
Losses reclassified from net accumulated other comprehensive loss	43			—			43
Net current period other comprehensive income	43			11			54
Accumulated other comprehensive loss at June 30	$	(732	)	$	(441	)	$	(1,173	)

	Six Months Ended June 30, 2017
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at Jan. 1	$	(678	)	$	(612	)	$	(1,290	)
Losses reclassified from net accumulated other comprehensive loss	19			30			49
Net current period other comprehensive income	19			30			49
Accumulated other comprehensive loss at June 30	$	(659	)	$	(582	)	$	(1,241	)

	Six Months Ended June 30, 2016
(Thousands of Dollars)	Gains and Losses on Cash Flow Hedges			Defined Benefit and Postretirement Items			Total
Accumulated other comprehensive loss at Jan. 1	$	(817	)	$	(464	)	$	(1,281	)
Other comprehensive loss before reclassifications	—			23			23
Losses reclassified from net accumulated other comprehensive loss	85			—			85
Net current period other comprehensive income	85			23			108
Accumulated other comprehensive loss at June 30	$	(732	)	$	(441	)	$	(1,173	)

Reclassifications from accumulated other comprehensive loss for the three and six months ended June 30, 2017 and 2016 were as follows:

	Amounts Reclassified from Accumulated Other Comprehensive Loss
(Thousands of Dollars)	Three Months Ended June 30, 2017				Three Months Ended June 30, 2016
Losses on cash flow hedges:
Interest rate derivatives	$	16		(a)	$	67		(a)
Total, pre-tax	16				67
Tax benefit	(6		)		(24		)
Total, net of tax	10				43
Defined benefit pension and postretirement losses:
Amortization of net loss	24			(b)	—			(b)
Total, pre-tax	24				—
Tax benefit	(9		)		—
Total, net of tax	15				—
Total amounts reclassified, net of tax	$	25			$	43

	Amounts Reclassified from Accumulated Other Comprehensive Loss
(Thousands of Dollars)	Six Months Ended June 30, 2017				Six Months Ended June 30, 2016
Losses on cash flow hedges:
Interest rate derivatives	$	31		(a)	$	134		(a)
Total, pre-tax	31				134
Tax benefit	(12		)		(49		)
Total, net of tax	19				85
Defined benefit pension and postretirement losses:
Amortization of net loss	48			(b)	—			(b)
Total, pre-tax	48				—
Tax benefit	(18		)		—
Total, net of tax	30				—
Total amounts reclassified, net of tax	$	49			$	85

^(a)  Included in interest charges.

^(b)  Included in the computation of net periodic pension and postretirement benefit costs. See Note 10 for details regarding these benefit plans.