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

3 Months Ended

Mar. 31, 2017

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,
	2017			2016
Qualified Pension Plan
Service cost, benefits earned during the period	$	—		$	296
Interest cost on projected benefit obligation	403			470
Expected return on plan assets	(785		)	(755		)
Amortization of unrecognized transition obligation	—			—
Amortization of unrecognized prior service cost	—			2
Amortization of unrecognized net loss	58			384
Net periodic pension cost	$	(324	)	$	397
Supplemental Pension Plan
Service cost, benefits earned during the period	$	—		$	11
Interest cost on projected benefit obligation	12			13
Expected return on plan assets	—			—
Amortization of unrecognized prior service cost	—			—
Amortization of unrecognized net loss	1			6
Net periodic supplemental pension cost	$	13		$	30
Postretirement Plan, Medical and Life
Service cost, benefits earned during the period	$	—		$	12
Interest cost on projected benefit obligation	4			17
Expected return on plan assets	—			—
Amortization of unrecognized prior service cost	(55		)	(24		)
Amortization of unrecognized net loss	29			6
Net periodic postretirement, medical and life cost	$	(22	)	$	11