Accumulated Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated Other Comprehensive Income (Loss) [Abstract]
Currency Translation Adjustments, Beginning balance	$ 17,024	$ 20,618	$ 17,092
Currency Translation Adjustments, Net Change	(1,123)	(3,594)	3,526
Currency Translation Adjustments, Ending balance	15,901	17,024	20,618
Pension Benefit Adjustments, Beginning balance	(19,581)	(19,534)	(22,717)
Pension Benefit Adjustments, Net Change	(9,076)	(47)	3,183
Pension Benefit Adjustments, Ending balance	(28,657)	(19,581)	(19,534)
Derivatives and Other, Beginning balance	(1,517)	(2,090)	(825)
Derivatives and Other, Net Change	756	573	(1,265)
Derivatives and Other, Ending balance	(761)	(1,517)	(2,090)
Accumulated Other Comprehensive Income (Loss), Beginning balance	(4,074)	(1,006)	(6,450)
Accumulated Other Comprehensive Income (Loss), Net Change	(9,443)	(3,068)	5,444
Accumulated Other Comprehensive Income (Loss), Ending balance	$ (13,517)	$ (4,074)	$ (1,006)