
12.	Retirement Benefit Plans

Our defined benefit pension plans and postretirement medical plan are described in Note 13 of our annual report on Form 10-K for the year ended December 31, 2017. We have contributed $37 and $287 during the second quarter of 2018 and $151 and $556 during the first six months of 2018 to our pension plans and postretirement medical plan, respectively.

The components of the net benefit cost for the three and six months ended June 30, 2018 and 2017 were as follows:



	Three Months Ended
	June 30
	Pension Benefits											Postretirement
	U.S. Plans					Non-U.S. Plans						Medical Benefits
	2018		2017			2018			2017			2018		2017
Service cost	$	—	$	—		$	35		$	24		$	14	$	20
Interest cost	11		390			87			129			75		90
Expected return on plan assets	—		(586		)	(82		)	(101		)	—		—
Amortization of net actuarial loss	11		11			—			—			—		—
Amortization of prior service cost	—		—			32			49			—		—
Foreign currency	—		—			(23		)	234			—		—
Net periodic cost (credit)	22		(185		)	49			335			89		110
Settlement charge	—		205			—			—			—		—
Net benefit cost	$	22	$	20		$	49		$	335		$	89	$	110



	Six Months Ended
	June 30
	Pension Benefits											Postretirement
	U.S. Plans					Non-U.S. Plans						Medical Benefits
	2018		2017			2018			2017			2018		2017
Service cost	$	—	$	—		$	72		$	48		$	28	$	40
Interest cost	22		780			158			219			150		181
Expected return on plan assets	—		(1,171		)	(191		)	(197		)	—		—
Amortization of net actuarial loss	24		21			—			—			—		—
Amortization of prior service cost	—		—			106			96			—		—
Foreign currency	—		—			(94		)	229			—		—
Net periodic cost (credit)	46		(370		)	51			395			178		221
Settlement charge	50		205			—			—			—		—
Net benefit cost (credit)	$	96	$	(165	)	$	51		$	395		$	178	$	221