COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS

COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS

The components of net periodic expense for the Corporation’s pension and other benefit plans for the periods indicated are as follows (in thousands):

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2016			2015			2016			2015
Qualified Pension Plan
Service cost, benefits earned during the period	$	298		$	353		$	594		$	707
Interest cost on projected benefit obligation	470			457			940			914
Expected return on plan assets	(756		)	(824		)	(1,511		)	(1,647		)
Amortization of unrecognized transition obligation	—			—			—			—
Amortization of unrecognized prior service cost	2			3			4			5
Amortization of unrecognized net loss	383			369			767			737
Net periodic pension cost	$	397		$	358		$	794		$	716
Supplemental Pension Plan
Service cost, benefits earned during the period	$	10		$	11		$	21		$	22
Interest cost on projected benefit obligation	13			12			26			24
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	—			—			—			—
Amortization of unrecognized net loss	7			13			13			26
Net periodic supplemental pension cost	$	30		$	36		$	60		$	72
Postretirement Plan, Medical and Life
Service cost, benefits earned during the period	$	12		$	12		$	24		$	24
Interest cost on projected benefit obligation	18			16			35			32
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	(25		)	(24		)	(49		)	(48		)
Amortization of unrecognized net loss	6			2			12			4
Net periodic postretirement, medical and life cost	$	11		$	6		$	22		$	12