Pension Plans (Tables)

6 Months Ended

Jun. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Pension Cost

Net periodic pension cost for this plan included the following components:

	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
Service cost	$	84		$	72		$	166		$	127
Interest cost		333			363			666			729
Expected return on plan assets		(496	)		(476	)		(991	)		(951	)
Recognized net actuarial loss		121			131			242			248
Net periodic pension cost	$	42		$	90		$	83		$	153