Pension and Other Postretirement Benefit Plans

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



	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
	(In thousands)
Defined Benefit Pension Plans
Service cost	$	250		$	326		$	751		$	976
Interest cost	1,312			1,166			3,936			3,500
Expected return on plan assets	(2,078		)	(1,949		)	(6,235		)	(5,845		)
Amortization of prior service credit	—			—			(1		)	(1		)
Amortization of unrecognized net loss	569			946			1,707			2,838
Net periodic benefit cost	$	53		$	489		$	158		$	1,468
Postretirement Benefit Plan
Service cost	$	5		$	5		$	14		$	14
Interest cost	36			36			107			108
Amortization of prior service cost	32			27			97			233
Amortization of unrecognized net gain	(26		)	(18		)	(78		)	(55		)
Net periodic benefit cost	$	47		$	50		$	140		$	300

The Corporation’s pension plan does not have a contribution requirement in 2014. The Corporation made a $15.0 million contribution to the pension plan during the nine months ended September 30, 2013. The discount rate used to compute the Corporation's pension plan expense for 2014 is 5.00%.

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 $1.0 million and $0.9 million for the three months ended September 30, 2014 and 2013, respectively, and $2.7 million for both the nine months ended September 30, 2014 and 2013.