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 September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Qualified Pension Plan
Service cost, benefits earned during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	379			385			1,136			1,154
Expected return on plan assets	(554		)	(826		)	(1,661		)	(2,478		)
Amortization of unrecognized transition obligation	—			—			—			—
Amortization of unrecognized prior service cost	—			—			—			—
Amortization of unrecognized net loss	49			43			147			130
Net periodic pension benefit	$	(126	)	$	(398	)	$	(378	)	$	(1,194	)

Supplemental Pension Plan
Service cost, benefits earned during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	13			12			39			36
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	—			—			—			—
Amortization of unrecognized net loss	1			1			3			5
Net periodic supplemental pension cost	$	14		$	13		$	42		$	41

Postretirement Plan, Medical and Life
Service cost, benefits earned during the period	$	—		$	—		$	—		$	—
Interest cost on projected benefit obligation	4			4			10			11
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	(55		)	(55		)	(165		)	(165		)
Amortization of unrecognized net loss	22			28			68			83
Net periodic postretirement, medical and life benefit	$	(29	)	$	(23	)	$	(87	)	$	(71	)