Changes in Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2013

Changes in Accumulated Other Comprehensive Loss

Changes in Accumulated Other Comprehensive Loss

15. Changes in Accumulated Other Comprehensive Loss

The following table shows the changes in accumulated other comprehensive loss, including reclassification adjustments, by component for the three-month period ended March 31, 2013 (dollars in thousands):

	Derivative Instruments			Pension and Other Postretirement Benefits			Total
Beginning balance, January 1	$	(49,592	)	$	(64,416	)	$	(114,008	)
Other comprehensive income before reclassifications, net of tax expense of $38	58			—			58
Amounts reclassified from accumulated other comprehensive loss:
Net realized loss, net of tax benefit of $3,300	5,053			—			5,053
Amortization of actuarial loss, net of tax benefit of $582	—			890			890
Amortization of prior service cost, net of tax benefit of $49	—			76			76
Total reclassifications for the period, net of tax benefit of $3,300, $631 and $3,931	5,053		(a)	966		(b)	6,019
Net current period other comprehensive income, net of tax expense of $3,338, $631 and $3,969	5,111			966			6,077
Ending balance, March 31	$	(44,481	)	$	(63,450	)	$	(107,931	)

(a) These amounts are included in the computation of fuel and purchased power costs and are subject to the PSA.  See Note 7.

(b) These amounts are included in the computation of net periodic pension cost.  See Note 4.