Pension Plans and Other Postretirement Employee Benefits

3 Months Ended

Mar. 31, 2013

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Pension Plans and Other Postretirement Employee Benefits

PENSION PLANS AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS

The following table details the components of net periodic cost (benefit) of our pension plans and other postretirement employee benefits, or OPEB, for the three months ended March 31:

	Pension Plans						Other Postretirement Employee Benefits
(Dollars in thousands)	2013			2012			2013			2012
Service cost	$	1,413		$	1,282		$	23		$	123
Interest cost	4,454			4,981			458			751
Expected return on plan assets	(6,524		)	(7,173		)	—			—
Amortization of prior service cost (credit)	195			193			(2,427		)	(2,279		)
Amortization of actuarial loss	4,944			3,703			815			982
Net periodic cost (benefit)	$	4,482		$	2,986		$	(1,131	)	$	(423	)

During the three months ended March 31, 2013, we made contributions of $0.4 million to our non-qualified supplemental pension plan.

The following tables detail the changes in accumulated other comprehensive loss (AOCL) by component, in accordance with ASU No. 2013-02, for the three months ended March 31:

	2013
(Dollars in thousands)	Pension Plans		Other Postretirement Employee Benefits			Total
AOCL at January 1						$	140,898
Amortization of defined benefit items, net of tax(a)
Prior service cost (credit)	$	119	$	(1,481	)	(1,362		)
Actuarial loss	3,016		497			3,513
Total reclassification for the period	$	3,135	$	(984	)	2,151
AOCL at March 31						$	138,747
	2012
(Dollars in thousands)	Pension Plans		Other Postretirement Employee Benefits			Total
AOCL at January 1						$	140,882
Amortization of defined benefit items, net of tax(a)
Prior service cost (credit)	$	117	$	(1,390	)	(1,273		)
Actuarial loss	2,259		599			2,858
Total reclassification for the period	$	2,376	$	(791	)	1,585
AOCL at March 31						$	139,297

^(a) Amortization of prior service credit and amortization of actuarial loss are included in the computation of net periodic pension cost.