Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2013

Defined Benefit Plans and Other Postretirement Benefit Plans

Net periodic pension expense for U.S and non-U.S. defined benefit pension plans or net periodic postretirement benefit cost

	U.S. Pension Plan												Non-U.S. Pension Plans
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
	September 30,						September 30,						September 30,						September 30,
(in thousands)	2013			2012			2013			2012			2013			2012			2013			2012
Service cost	$	1,613		$	1,489		$	4,840		$	4,468		$	3,809		$	1,921		$	11,505		$	5,815
Interest cost	7,275			8,323			21,825			24,970			7,989			8,070			23,925			24,518
Expected return on assets	(7,744		)	(8,830		)	(23,232		)	(26,492		)	(11,527		)	(10,369		)	(34,507		)	(31,446		)
Amortization of prior service cost	26			(28		)	77			(85		)	—			—			—			—
Recognized net actuarial loss	1,510			3,409			4,530			10,226			1,683			786			5,058			2,352
Net periodic pension expense	$	2,680		$	4,363		$	8,040		$	13,087		$	1,954		$	408		$	5,981		$	1,239