Pension Benefit and Other Postretirement Benefit Plans

3 Months Ended

Mar. 31, 2013

Pension Benefit and Other Postretirement Benefit Plans

Pension Benefit and Other Postretirement Benefit Plans

Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the periods indicated are:

(Dollars in thousands)	Pension Benefits						Retirement Health and Life Insurance Benefits
	Three Months Ended						Three Months Ended
Change in benefit obligation:	March 31, 2013			March 31, 2012			March 31, 2013			March 31, 2012
Service cost	$	1,254		$	1,189		$	170		$	182
Interest cost	2,061			2,118			71			88
Expected return on plan assets	(2,716		)	(2,408		)	—			—
Amortization of prior service cost	93			116			(58		)	(113		)
Amortization of net loss	1,476			1,349			83			115
Special termination benefit	—			—			—			2,300
Net periodic benefit cost	$	2,168		$	2,364		$	266		$	2,572

As a result of the early retirement program that we offered in the first quarter of 2012, we incurred a $2.3 million special termination benefit associated with our retirement health and life insurance benefits program, as we extended eligibility in the benefits to certain individuals who participated in the early retirement program.

Employer Contributions

In the first quarter of 2013 and 2012, we made contributions of $6.5 million and $10.0 million, respectively, to our qualified defined benefit pension plans. We made no payments under our non-qualified defined benefit pension plan in the first quarter of 2013 or 2012.