Benefit Plans

9 Months Ended

Sep. 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 September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Components of Net Periodic Pension Cost
Service Cost	$	1,799		$	1,531		$	5,397		$	4,593
Interest Cost	2,965			2,860			8,895			8,580
Expected return on assets	(3,034		)	(3,328		)	(9,102		)	(9,984		)
Amortization of unrecognized prior service costs	97			98			291			294
Cumulative net loss	2,593			1,780			7,779			5,340
Net periodic pension cost	$	4,420		$	2,941		$	13,260		$	8,823

	Postretirement Benefits
	Three Months Ended September 30,					Nine Months Ended September 30,
	2012			2011		2012			2011
Components of Net Periodic Postretirement Cost
Service Cost	$	19		$	14	$	57		$	42
Interest Cost	174			221		522			663
Amortization of unrecognized prior service costs	(117		)	—		(351		)	—
Cumulative net loss	72			28		216			84
Net periodic postretirement cost	$	148		$	263	$	444		$	789

Management contributed $10.0 million to the qualified pension plan in the quarter ended September 30, 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.