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Pension and Other Postretirement Benefit Plans
 9 Months Ended
Sep. 30, 2012
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
 
Nine Months Ended
 
 
September 30,
 
September 30,
 
 
2012
 
2011
 
2012
 
2011
 
 
(In thousands)
Defined Benefit Pension Plans
 
 
 
 
 
 
 
 
Service cost
 
$
304

 
$
290

 
$
910

 
$
872

Interest cost
 
1,214

 
1,207

 
3,644

 
3,622

Expected return on plan assets
 
(1,731
)
 
(1,582
)
 
(5,194
)
 
(4,746
)
Amortization of prior service credit
 
—

 
—

 
(1
)
 
(1
)
Amortization of unrecognized net loss
 
614

 
270

 
1,843

 
809

Net periodic benefit cost
 
$
401

 
$
185

 
$
1,202

 
$
556

Postretirement Benefit Plan
 
 
 
 
 
 
 
 
Interest cost
 
$
37

 
$
42

 
$
110

 
$
125

Amortization of prior service credit
 
(75
)
 
(81
)
 
(225
)
 
(243
)
Amortization of unrecognized net gain
 
(7
)
 
(8
)
 
(21
)
 
(24
)
Net periodic benefit income
 
$
(45
)
 
$
(47
)
 
$
(136
)
 
$
(142
)

A minimum required contribution of $0.4 million is due to the Corporation’s pension plan during 2012, which will be fully funded by a portion of the plan’s available funding balance. The Corporation made a $12.0 million contribution to the pension plan during the first quarter of 2012 related to the 2011 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 $0.8 million and $0.7 million for the three months ended September 30, 2012 and 2011, respectively, and $2.3 million and $2.1 million for the nine months ended September 30, 2012 and 2011, respectively.