Pensions (Reconciliation Of Changes In Projected Benefit Obligations, Fair Value Of Plan Assets And Net Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations at January 1	$ 95,455	$ 87,132
Service cost	1,022	869	768
Interest cost	4,942	4,882	4,791
Actuarial (gain) loss	9,297	5,972
Benefits paid	(4,589)	(3,400)
Projected benefit obligations at December 31	106,127	95,455	87,132
Fair value of plan assets at January 1	83,539	65,708
Actual return on plan assets	(2,149)	8,636
Employer contributions	6,169	12,595
Benefits paid	(4,589)	(3,400)
Fair value of plan assets at December 31	82,970	83,539	65,708
Funded Status at December 31	(23,157)	(11,916)
Current liability - Accrued benefit cost	(82)	(82)
Noncurrent liability - Accrued benefit cost	(23,075)	(11,834)
Net amount recognized	(23,157)	(11,916)
European Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations at January 1	34,768	36,201
Service cost	155	493	482
Interest cost	1,947	1,773	1,888
Employee contributions	107	166
Actuarial (gain) loss	(1,820)	674
Benefits paid	(1,433)	(1,729)
Special termination benefits	200
Curtailment gain		(1,040)
Foreign currency exchange rate changes	(455)	(1,770)
Projected benefit obligations at December 31	33,469	34,768	36,201
Fair value of plan assets at January 1	22,843	21,832
Actual return on plan assets	1,324	1,797
Employer contributions	1,918	1,707
Employee contributions	107	166
Benefits paid	(1,433)	(1,729)
Foreign currency exchange rate changes	(345)	(930)
Fair value of plan assets at December 31	24,414	22,843	21,832
Funded Status at December 31	(9,055)	(11,925)
Current liability - Accrued benefit cost	(537)	(537)
Noncurrent liability - Accrued benefit cost	(8,518)	(11,388)
Net amount recognized	$ (9,055)	$ (11,925)