Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2018

Compensation And Retirement Disclosure [Abstract]

Contributions for Pension and Other Postretirement Benefits

Contributions were as follows:

	Three Months Ended March 31,
	2018		2017
Foreign defined benefit pension plans	$	540	$	424
Other postretirement benefits (e.g., net payments)		307		275
U.K. defined contribution pension plan		91		65
U.S. defined contribution plan		705		650

Net Periodic Pension and Other Postretirement Costs

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

	Three Months Ended March 31,
U.S. Defined Benefit Pension Plans	2018			2017
Service cost	$	335		$	411
Interest cost		2,040			2,098
Expected return on plan assets		(3,284	)		(3,127	)
Amortization of prior service cost		13			13
Amortization of actuarial loss		475			936
Net benefit (income) cost	$	(421	)	$	331

	Three Months Ended March 31,
Foreign Defined Benefit Pension Plans	2018			2017
Service cost	$	111		$	90
Interest cost		364			445
Expected return on plan assets		(672	)		(538	)
Amortization of prior service credit		(88	)		0
Amortization of actuarial loss		194			181
Net benefit (income) cost	$	(91	)	$	178

	Three Months Ended March 31,
Other Postretirement Benefit Plans	2018			2017
Service cost	$	102		$	172
Interest cost		125			172
Amortization of prior service credit		(402	)		(405	)
Amortization of actuarial (gain) loss		(62	)		8
Net benefit income	$	(237	)	$	(53	)