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Benefit Plans
 6 Months Ended
Jun. 30, 2012
Compensation and Retirement Disclosure [Abstract]  
Benefit Plans

The Corporation sponsors several qualified and nonqualified pension and other postretirement plans for certain of its employees. The net periodic pension cost is based on estimated values provided by an outside actuary. The components of net periodic benefit cost are as follows:
 
Pension Benefits
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
Components of Net Periodic Pension Cost
 
 
 
 
 
 
 
Service Cost
$
1,799

 
$
1,531

 
$
3,598

 
$
3,062

Interest Cost
2,965

 
2,860

 
5,930

 
5,720

Expected return on assets
(3,034
)
 
(3,328
)
 
(6,068
)
 
(6,656
)
Amortization of unrecognized prior service costs
97

 
98

 
194

 
196

Cumulative net loss
2,593

 
1,780

 
5,186

 
3,560

Net periodic pension cost
$
4,420

 
$
2,941

 
$
8,840

 
$
5,882

 
Postretirement Benefits
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
Components of Net Periodic Postretirement Cost
 
 
 
 
 
 
 
Service Cost
$
19

 
$
14

 
$
38

 
$
28

Interest Cost
174

 
221

 
348

 
442

Amortization of unrecognized prior service costs
(117
)
 
—

 
(234
)
 
—

Cumulative net loss
72

 
28

 
144

 
56

Net periodic postretirement cost
$
148

 
$
263

 
$
296

 
$
526



Management anticipates contributing $10.0 million to the qualified pension plan in 2012.

The Corporation also maintains a savings plan under Section 401(k) of the Internal Revenue Code of 1986, as amended, covering substantially all full-time and part-time employees beginning in the quarter following three months of continuous employment. The savings plan was approved for non-vested employees in the defined benefit pension plan and new hires as of January 1, 2007. Effective January 1, 2009, the Corporation suspended its matching contribution to the savings plan. Effective April 1, 2011, the Corporation reinstated its matching contribution to $.50 for each $1.00 up to 1% of an employee’s qualifying salary. Matching contributions vest in accordance with plan specifications.