Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The net periodic benefit cost for the Corporation’s Pension Plan consisted of the following components:

	Three months ended June 30						Six months ended June 30
	2015			2014			2015			2014
	(in thousands)
Service cost (1)	$	145		$	92		$	290		$	184
Interest cost	851			853			1,702			1,706
Expected return on plan assets	(752		)	(810		)	(1,504		)	(1,621		)
Net amortization and deferral	782			244			1,564			488
Net periodic benefit cost	$	1,026		$	379		$	2,052		$	757

(1) The Pension Plan service cost recorded for the six months ended June 30, 2015 and 2014 was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits.

The net periodic cost (benefit) of the Corporation’s Postretirement Plan consisted of the following components, excluding the $1.5 million plan amendment gain in 2014:

	Three months ended June 30						Six months ended June 30
	2015			2014			2015			2014
	(in thousands)
Service cost (1)	$	—		$	—		$	—		$	15
Interest cost	52			48			104			109
Net accretion and deferral	(65		)	(84		)	(130		)	(179		)
Net periodic benefit	$	(13	)	$	(36	)	$	(26	)	$	(55	)

(1) As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014.