COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS

9 Months Ended

Sep. 30, 2016

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,
	2016			2015			2016			2015
Qualified Pension Plan
Service cost, benefits earned during the period	$	298		$	354		$	892		$	1,061
Interest cost on projected benefit obligation	470			457			1,410			1,371
Expected return on plan assets	(756		)	(824		)	(2,267		)	(2,471		)
Amortization of unrecognized transition obligation	—			—			—			—
Amortization of unrecognized prior service cost	1			2			5			7
Amortization of unrecognized net loss	383			369			1,150			1,106
Net periodic pension cost	$	396		$	358		$	1,190		$	1,074

Supplemental Pension Plan
Service cost, benefits earned during the period	$	11		$	11		$	32		$	33
Interest cost on projected benefit obligation	13			13			39			37
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	—			—			—			—
Amortization of unrecognized net loss	6			12			19			38
Net periodic supplemental pension cost	$	30		$	36		$	90		$	108

Postretirement Plan, Medical and Life
Service cost, benefits earned during the period	$	11		$	11		$	35		$	35
Interest cost on projected benefit obligation	18			16			53			48
Expected return on plan assets	—			—			—			—
Amortization of unrecognized prior service cost	(23		)	(24		)	(72		)	(72		)
Amortization of unrecognized net loss	7			3			19			7
Net periodic postretirement, medical and life cost	$	13		$	6		$	35		$	18