
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 $36 and $139 during the third quarter of 2018 and $187 and $695 during the first nine months of 2018 to our pension plans and postretirement medical plan, respectively.

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



	Three Months Ended
	September 30
	Pension Benefits											Postretirement
	U.S. Plans					Non-U.S. Plans						Medical Benefits
	2018		2017			2018			2017			2018		2017
Service cost	$	—	$	—		$	33		$	124		$	6	$	6
Interest cost	10		373			82			96			70		91
Expected return on plan assets	—		(581		)	(77		)	(101		)	—		—
Amortization of net actuarial loss	13		12			—			—			—		—
Amortization of prior service cost	—		—			54			50			—		—
Foreign currency	—		—			(118		)	135			—		—
Net periodic benefit cost (credit)	23		(196		)	(26		)	304			76		97
Net benefit cost (credit)	$	23	$	(196	)	$	(26	)	$	304		$	76	$	97



	Nine Months Ended
	September 30
	Pension Benefits											Postretirement
	U.S. Plans					Non-U.S. Plans						Medical Benefits
	2018		2017			2018			2017			2018		2017
Service cost	$	—	$	—		$	105		$	172		$	34	$	46
Interest cost	32		1,153			240			315			220		272
Expected return on plan assets	—		(1,752		)	(268		)	(298		)	—		—
Amortization of net actuarial loss	37		33			—			—			—		—
Amortization of prior service cost	—		—			160			146			—		—
Foreign currency	—		—			(212		)	364			—		—
Net periodic benefit cost (credit)	69		(566		)	25			699			254		318
Settlement charge	50		205			—			—			—		—
Net benefit cost (credit)	$	119	$	(361	)	$	25		$	699		$	254	$	318