Retirement Plans (Components Of Net Periodic Pension Benefit Cost) (Details) (United Kingdom Subsidiary [Member], Foreign Pension Plans, Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
United Kingdom Subsidiary [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 3,033	$ 3,114	$ 6,103	$ 6,221
Expected return on plan assets	(3,536)	(3,264)	(7,115)	(6,521)
Amortization of unrecognized loss	631	609	1,269	1,217
Net periodic pension cost	$ 128	$ 459	$ 257	$ 917