COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Components of 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   March 31,
	2016			2015
Qualified Pension Plan
Service cost, benefits earned during the period	$	296		$	354
Interest cost on projected benefit obligation	470			457
Expected return on plan assets	(755		)	(823		)
Amortization of unrecognized transition obligation	—			—
Amortization of unrecognized prior service cost	2			2
Amortization of unrecognized net loss	384			368
Net periodic pension cost	$	397		$	358
Supplemental Pension Plan
Service cost, benefits earned during the period	$	11		$	11
Interest cost on projected benefit obligation	13			12
Expected return on plan assets	—			—
Amortization of unrecognized prior service cost	—			—
Amortization of unrecognized net loss	6			13
Net periodic supplemental pension cost	$	30		$	36
Postretirement Plan, Medical and Life
Service cost, benefits earned during the period	$	12		$	12
Interest cost on projected benefit obligation	17			16
Expected return on plan assets	—			—
Amortization of unrecognized prior service cost	(24		)	(24		)
Amortization of unrecognized net loss	6			2
Net periodic postretirement, medical and life cost	$	11		$	6