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

3 Months Ended

Mar. 31, 2018

Retirement Benefits [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,
	2018			2017
Qualified Pension Plan
Service cost, benefits earned during the period	$	—		$	—
Interest cost on projected benefit obligation	385			403
Expected return on plan assets	(826		)	(785		)
Amortization of unrecognized transition obligation	—			—
Amortization of unrecognized prior service cost	—			—
Amortization of unrecognized net loss	43			58
Net periodic pension benefit	$	(398	)	$	(324	)
Supplemental Pension Plan
Service cost, benefits earned during the period	$	—		$	—
Interest cost on projected benefit obligation	12			12
Expected return on plan assets	—			—
Amortization of unrecognized prior service cost	—			—
Amortization of unrecognized net loss	2			1
Net periodic supplemental pension cost	$	14		$	13
Postretirement Plan, Medical and Life
Service cost, benefits earned during the period	$	—		$	—
Interest cost on projected benefit obligation	3			4
Expected return on plan assets	—			—
Amortization of unrecognized prior service cost	(55		)	(55		)
Amortization of unrecognized net loss	28			29
Net periodic postretirement, medical and life benefit	$	(24	)	$	(22	)