Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2015

Retirement Benefits [Abstract]

Net Periodic Benefit (Credit) Cost

Net periodic benefit (credit) cost of our U.S. pension plans (including our unfunded nonqualified plans), non-U.S. pension plans, and postretirement health care and life insurance benefit plans for the three months endedJune 30, 2015 and 2014, respectively, follow:

	U.S. Pension Plans				Non-U.S. Pension Plans				Other Benefit Plans
	Three Months Ended June 30,
	2015		2014		2015		2014		2015		2014
	(Dollars in thousands)
Service cost	$	5	$	5	$	383	$	460	$	—	$	—
Interest cost		4,697		4,924		915		1,314		242		300
Expected return on plan assets		(7,291)		(7,034)		(674)		(808)		—		—
Amortization of prior service cost (credit)		3		3		15		16		—		(26)
Net periodic benefit (credit) cost	$	(2,586)	$	(2,102)	$	639	$	982	$	242	$	274

Net periodic benefit (credit) cost for the six months ended June 30, 2015 and 2014, respectively, follow:

	U.S. Pension Plans				Non-U.S. Pension Plans				Other Benefit Plans
	Six Months Ended June 30,
	2015		2014		2015		2014		2015		2014
	(Dollars in thousands)
Service cost	$	9	$	10	$	774	$	911	$	—	$	—
Interest cost		9,395		9,848		1,838		2,615		485		602
Expected return on plan assets		(14,583)		(14,067)		(1,349)		(1,605)		—		—
Amortization of prior service cost (credit)		6		6		30		31		—		(53)
Net periodic benefit (credit) cost	$	(5,173)	$	(4,203)	$	1,293	$	1,952	$	485	$	549