Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Employee Benefit Plans [Abstract]

Components of Net Periodic Benefit Cost

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
Pension Benefits	2018		2017		2018		2017
Interest cost	$	428	$	446	$	1,283	$	1,338
Expected return on plan assets		(711)		(642)		(2,133)		(1,926)
Amortization of unrecognized net loss		112		119		338		357
Plan curtailment and special termination benefits		-		-		-		270
	$	(171)	$	(77)	$	(512)	$	39
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
Postretirement Benefit Plan	2018		2017		2018		2017
Service cost	$	8	$	13	$	24	$	37
Interest cost		46		51		138		151
Amortization of prior service cost		4		4		12		11
Amortization of unrecognized net (gain) loss		(70)		(79)		(210)		(238)
Plan curtailment and special termination benefits		-		-		-		150
	$	(12)	$	(11)	$	(36)	$	111