Benefit Plans (Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Income) (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]
Interest cost	$ 3,505	$ 3,738	$ 4,214
Expected return on plan assets	(4,118)	(3,603)	(3,193)
Amortization of prior-service cost (credit)			7
Amortization of net loss (gain)	1,231	1,340	1,787
Net periodic benefit cost (income)	618	1,475	2,815
Total net periodic benefit cost (income) recognized	618	1,475	2,815
Net actuarial loss (gain)	8,423	(1,032)	(3,604)
Amortization of net actuarial (loss) gain	(1,231)	(1,340)	(1,787)
Amortization of prior service (cost) credit			(7)
Total recognized in other comprehensive income	7,192	(2,372)	(5,398)
Total recognized in net periodic benefit cost and other comprehensive income	7,810	(897)	(2,583)
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,205	1,054	1,092
Interest cost	12,179	11,650	11,077
Expected return on plan assets	(11,256)	(10,390)	(9,028)
Amortization of prior-service cost (credit)	37	29	32
Amortization of net loss (gain)	904	983	(75)
Net periodic benefit cost (income)	3,069	3,326	3,098
Gain due to settlements or curtailments		(818)	(66)
Total net periodic benefit cost (income) recognized	3,069	2,508	3,032
Net actuarial loss (gain)	6,641	(582)	21,382
Amortization of net actuarial (loss) gain	(904)	(917)	75
Prior service cost		127
Amortization of prior service (cost) credit	(37)	(29)	(118)
Effect of foreign currency exchange rate changes	(442)	(3,704)	(28)
Total recognized in other comprehensive income	5,258	(5,105)	21,311
Total recognized in net periodic benefit cost and other comprehensive income	8,327	(2,597)	24,343
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	28	26	38
Interest cost	769	888	1,069
Amortization of prior-service cost (credit)	(59)	(128)	(165)
Amortization of net loss (gain)	(1,271)	(1,446)	(1,360)
Net periodic benefit cost (income)	(533)	(660)	(418)
Total net periodic benefit cost (income) recognized	(533)	(660)	(418)
Net actuarial loss (gain)	1,812	(1,304)	(631)
Amortization of net actuarial (loss) gain	1,271	1,446	1,360
Amortization of prior service (cost) credit	59	128	165
Effect of foreign currency exchange rate changes	39	(16)
Total recognized in other comprehensive income	3,181	254	894
Total recognized in net periodic benefit cost and other comprehensive income	$ 2,648	$ (406)	$ 476