Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2019

Compensation And Retirement Disclosure [Abstract]

Contributions for Pension and Other Postretirement Benefits

Contributions were as follows:

	Three Months Ended March 31,
	2019		2018
U.S. defined benefit pension plans	$	253	$	0
Foreign defined benefit pension plans		93		540
Other postretirement benefits (e.g., net payments)		266		307
U.K. defined contribution pension plan		85		91
U.S. defined contribution plan		625		705

Net Periodic Pension and Other Postretirement Benefit Costs

Net periodic pension and other postretirement benefit costs include the following components:

	Three Months Ended March 31,
U.S. Defined Benefit Pension Plans	2019			2018
Service cost	$	194		$	335
Interest cost		2,220			2,040
Expected return on plan assets		(3,173	)		(3,284	)
Amortization of prior service cost		9			13
Amortization of actuarial loss		308			475
Net benefit income	$	(442	)	$	(421	)

	Three Months Ended March 31,
Foreign Defined Benefit Pension Plans	2019			2018
Service cost	$	102		$	111
Interest cost		357			364
Expected return on plan assets		(591	)		(672	)
Amortization of prior service credit		(72	)		(88	)
Amortization of actuarial loss		166			194
Net benefit income	$	(38	)	$	(91	)

	Three Months Ended March 31,
Other Postretirement Benefit Plans	2019			2018
Service cost	$	88		$	102
Interest cost		105			125
Amortization of prior service credit		(489	)		(402	)
Amortization of actuarial gain		(83	)		(62	)
Curtailment gain		(15	)		0
Net benefit income	$	(394	)	$	(237	)