Benefit Plans (Schedule Of Reconciliation Of Changes In The Benefit Obligations And Fair Value Of Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets as of December 31	$ 215,775	$ 210,498
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Obligations as of January 1	71,116	71,524
Interest cost	3,505	3,738	4,214
Actuarial losses (gains)	5,456	718
Benefit payments	(5,210)	(4,864)
Benefit obligations as of December 31	74,867	71,116	71,524
Fair value of plan assets as of January 1	52,169	47,037
Actual return on plan assets	1,150	5,353
Employer contributions	6,578	4,643
Benefit payments and plan expenses	(5,210)	(4,864)
Fair value of plan assets as of December 31	54,687	52,169	47,037
Funded status as of December 31	(20,180)	(18,947)
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Obligations as of January 1	219,832	220,326
Service cost	1,205	1,054	1,092
Interest cost	12,179	11,650	11,077
Participant contributions	50
Actuarial losses (gains)	(843)	4,495
Plan amendments		127
Benefit payments	(8,109)	(7,393)
Transfers	3,238	(769)
Effect of foreign currency exchange rate changes	(3,045)	(9,658)
Benefit obligations as of December 31	224,507	219,832	220,326
Fair value of plan assets as of January 1	158,329	150,788
Actual return on plan assets	3,734	15,466
Transfers	2,617
Employer contributions	5,850	5,227
Benefit payments and plan expenses	(8,109)	(7,409)
Effect of foreign currency exchange rate changes fair value of plan assets	(1,383)	(5,743)
Fair value of plan assets as of December 31	161,088	158,329	150,788
Funded status as of December 31	(63,419)	(61,503)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Obligations as of January 1	14,896	16,621
Service cost	28	26	38
Interest cost	769	888	1,069
Actuarial losses (gains)	1,811	(1,304)
Benefit payments	(1,497)	(1,428)
Effect of foreign currency exchange rate changes	(166)	93
Benefit obligations as of December 31	15,841	14,896	16,621
Funded status as of December 31	$ (15,841)	$ (14,896)