COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS

6 Months Ended

Jun. 30, 2018

Retirement Benefits [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,
	2018			2017			2018			2017
Qualified Pension Plan
Service cost, benefits earned during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	384			403			769			806
Expected return on plan assets	(826		)	(785		)	(1,652		)	(1,570		)
Amortization of unrecognized transition obligation	—			—			—			—
Amortization of unrecognized prior service cost	—			—			—			—
Amortization of unrecognized net loss	44			58			87			116
Net periodic pension benefit	$	(398	)	$	(324	)	$	(796	)	$	(648	)
Supplemental Pension Plan
Service cost, benefits earned during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	12			12			24			24
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	—			—			—			—
Amortization of unrecognized net loss	2			1			4			2
Net periodic supplemental pension cost	$	14		$	13		$	28		$	26
Postretirement Plan, Medical and Life
Service cost, benefits earned during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	4			4			7			8
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	(55		)	(55		)	(110		)	(110		)
Amortization of unrecognized net loss	27			29			55			58
Net periodic postretirement, medical and life benefit	$	(24	)	$	(22	)	$	(48	)	$	(44	)