Net Periodic Benefit Cost (Tables)

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic pension cost for the Company’s defined benefit pension plans and U.S. post-retirement medical plan includes the following components for the three months ended June 30:

	U.S. Pension Benefits						Non-U.S. Pension Benefits						Other U.S. Post-retirement Benefits						Total
	2018			2017			2018			2017			2018			2017			2018			2017
Service cost, net	$	272		$	141		$	3,744		$	3,952		$	—		$	—		4,016			4,093
Interest cost on projected benefit obligations	1,061			1,094			2,131			2,053			16			18			3,208			3,165
Expected return on plan assets	(1,732		)	(1,684		)	(7,688		)	(7,629		)	—			—			(9,420		)	(9,313		)
Recognition of prior service cost	—			—			(1,727		)	(974		)	(93		)	(195		)	(1,820		)	(1,169		)
Recognition of actuarial losses/(gains)	1,451			1,639			5,369			5,058			(313		)	(474		)	6,507			6,223
Net periodic pension cost/(credit)	$	1,052		$	1,190		$	1,829		$	2,460		$	(390	)	$	(651	)	$	2,491		$	2,999

Net periodic pension cost for the Company’s defined benefit pension plans and U.S. post-retirement medical plan includes the following components for the six months ended June 30:

	U.S. Pension Benefits						Non-U.S. Pension Benefits						Other U.S. Post-retirement Benefits						Total
	2018			2017			2018			2017			2018			2017			2018			2017
Service cost, net	$	544		$	282		$	7,664		$	7,976		$	—		$	—		8,208			8,258
Interest cost on projected benefit obligations	2,122			2,188			4,354			4,122			32			36			6,508			6,346
Expected return on plan assets	(3,464		)	(3,368		)	(15,675		)	(15,014		)	—			—			(19,139		)	(18,382		)
Recognition of prior service cost	—			—			(3,521		)	(2,797		)	(186		)	(390		)	(3,707		)	(3,187		)
Recognition of actuarial losses/(gains)	2,902			3,278			10,929			10,950			(626		)	(948		)	13,205			13,280
Net periodic pension cost/(credit)	$	2,104		$	2,380		$	3,751		$	5,237		$	(780	)	$	(1,302	)	$	5,075		$	6,315