Pension and Other Postretirement Benefit Plans

3 Months Ended

Mar. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefit Plans

Pension and Other Postretirement Benefit Plans

The components of net periodic benefit cost (income) for the Corporation’s qualified and nonqualified pension plans and nonqualified postretirement benefit plan are as follows:

	Three Months Ended March 31,
	2013			2012
	(In thousands)
Defined Benefit Pension Plans
Service cost	$	325		$	303
Interest cost	1,167			1,215
Expected return on plan assets	(1,948		)	(1,731		)
Amortization of unrecognized net loss	946			614
Net periodic benefit cost	$	490		$	401
Postretirement Benefit Plan
Interest cost	$	75		$	37
Amortization of prior service credit	—			(75		)
Amortization of unrecognized net gain	—			(7		)
Net periodic benefit cost (income)	$	75		$	(45	)

The Corporation’s pension plan does not have a contribution requirement in 2013. The Corporation made a voluntary $15.0 million contribution to the pension plan during the first quarter of 2013 related to the 2012 plan year.

401(k) Savings Plan expense for the Corporation’s match of participants’ base compensation contributions and a 4% of eligible pay contribution to certain employees who are not grandfathered under the pension plan was $0.9 million and $0.8 million for the three months ended March 31, 2013 and 2012, respectively.