Pension And Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Pension And Postretirement Benefits

Pension and postretirement benefit costs included in operating expenses [Table Text Block]

	Three months ended				Nine months ended
	September 30,				September 30,
	2018		2017		2018		2017
Pension cost:
Service cost – benefits earned during the period	$	270	$	282	$	845	$	846
Interest cost on projected benefit obligation		551		484		1,542		1,452
Expected return on assets		(761)		(783)		(2,276)		(2,350)
Amortization of prior service credit		(28)		(31)		(87)		(93)
Actuarial (gain) loss		-		-		(1,796)		-
Net pension (credit) cost	$	32	$	(48)	$	(1,772)	$	(145)
Postretirement cost:
Service cost – benefits earned during the period	$	27	$	32	$	82	$	107
Interest cost on accumulated postretirement benefit obligation		196		193		582		617
Expected return on assets		(76)		(81)		(228)		(240)
Amortization of prior service credit		(412)		(382)		(1,222)		(1,084)
Actuarial (gain) loss		-		-		(930)		(259)
Net postretirement (credit) cost	$	(265)	$	(238)	$	(1,716)	$	(859)
Combined net pension and postretirement (credit) cost	$	(233)	$	(286)	$	(3,488)	$	(1,004)