Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Compensation and Retirement Disclosure [Abstract]

Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost

The net periodic benefit cost for the Corporation’s Pension Plan and Postretirement Plan, as determined by consulting actuaries, consisted of the following components for the three and nine months ended September 30:

	Pension Plan
	Three Months Ended September 30						Nine Months Ended September 30
	2011			2010			2011			2010
	(in thousands)
Service cost (1)	$	15		$	26		$	45		$	78
Interest cost	853			842			2,559			2,526
Expected return on plan assets	(837		)	(802		)	(2,511		)	(2,406		)
Net amortization and deferral	72			119			216			357
Net periodic benefit cost	$	103		$	185		$	309		$	555

(1) The Pension Plan service cost recorded for the three and nine months ended September 30, 2011 and 2010, respectively, was related to administrative costs associated with the plan and not due to the accrual of additional participant benefits.

	Postretirement Plan
	Three Months Ended September 30						Nine Months Ended September 30
	2011			2010			2011			2010
	(in thousands)
Service cost	$	50		$	48		$	151		$	146
Interest cost	107			110			321			330
Expected return on plan assets	(1		)	(1		)	(3		)	(3		)
Net accretion and deferral	(91		)	(91		)	(273		)	(273		)
Net periodic benefit cost	$	65		$	66		$	196		$	200