Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2014

Retirement Benefits [Abstract]

Summary Of Net Periodic Benefit Cost For U.S. Employees

Pension Benefits	Three Months Ended
	March 31,
(Dollars in thousands)	2014			2013
Service cost	$	2,460		$	2,729
Interest cost		2,542			2,074
Expected return on plan assets		(2,823	)		(2,122	)
Amortization of prior service cost		13			13
Amortization of net (income) loss		1,091			1,904
Net periodic benefit cost	$	3,283		$	4,598
Other Benefits	Three Months Ended
	March 31,
(Dollars in thousands)	2014			2013
Service cost	$	407		$	499
Interest cost		342			277
Amortization of net (income) loss		82			154
Net periodic benefit cost	$	831		$	930