Retirement Benefits

The Company sponsors several qualified and nonqualified defined benefit and defined contribution pension plans and other postretirement plans for its employees. The following tables provide the components of net periodic benefit cost for its major defined benefit plans and its other postretirement plans.




	Pension Benefits
	Three Months Ended June 30,
	2018						2017
	U.S.			Non-U.S.			U.S.			Non-U.S.
Service cost	$	255		$	527		$	254		$	494
Interest cost	653			351			661			317
Expected return on plan assets	(983		)	(282		)	(944		)	(270		)
Net amortization	685			322			641			395
Net periodic benefit cost	$	610		$	918		$	612		$	936



	Pension Benefits
	Six Months Ended June 30,
	2018						2017
	U.S.			Non-U.S.			U.S.			Non-U.S.
Service cost	$	509		$	1,072		$	508		$	976
Interest cost	1,306			712			1,321			625
Expected return on plan assets	(1,966		)	(572		)	(1,888		)	(534		)
Net amortization	1,370			652			1,283			777
Net periodic benefit cost	$	1,219		$	1,864		$	1,224		$	1,844



	Other Postretirement Benefits
	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Service cost	$	167		$	152		$	335		$	304
Interest cost	203			204			406			408
Net amortization	(184		)	(199		)	(368		)	(397		)
Net periodic benefit cost	$	186		$	157		$	373		$	315

The Company previously disclosed in its financial statements for the year ended December 31, 2017, that it expected to contribute approximately $5.5 million to its defined benefit plans and $0.1 million to its other postretirement benefit plans in 2018. During the first six months of 2018, the Company contributed a total of $1.5 million to fund these plans and expects to contribute an additional $5.0 million to $20.0 million in the remaining six months of 2018.