Pension And Other Postretirement Benefit Plans (Schedule Of Components Of Net Pension And Postretirement Periodic Benefit Cost (Income)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010		Dec. 31, 2009
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	$ 3,313	$ 4,267
Service cost		(898)	[1]
Interest cost	158	225		254
Recognized net actuarial loss	(69)	(30)
Benefits paid	(89)	(251)
Benefit obligation at end of year	3,313	3,313		4,267
Funded status	3,313	3,313
Accrued postretirement obligation	3,313	3,313
Net pension and postretirement periodic benefit cost (income)	158	225		254
U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	227,207	198,617
Service cost		(159)
Interest cost	12,099	11,762
Recognized net actuarial loss	28,875	23,176
Benefits paid	(8,752)	(8,074)
Special termination benefits		139
Benefit obligation at end of year	261,255	227,207
Funded status	(118,356)	(92,400)
Defined contribution plans	1,826	1,746
U.S. [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		(159)		1,018
Interest cost	12,099	11,762		11,795
Expected return on plan assets	(10,753)	(11,210)		(10,745)
Amortization of prior service cost		264		425
Recognized net actuarial loss	2,252	891		25
Curtailment gain				(722)
Subtotal - defined benefit plan	3,598	1,548		1,796
Defined contribution plans		(34)		(116)
Net pension and postretirement periodic benefit cost (income)	3,598	1,582		1,912
Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	45,683	45,846
Service cost	172
Interest cost	2,292	2,144
Recognized net actuarial loss	2,172	1,494
Benefits paid	(2,779)	(2,756)
Benefit obligation at end of year	48,889	45,683
Funded status	(6,535)	(4,303)
Defined contribution plans	58
Non-U.S. [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost				296
Interest cost	2,191	2,144		1,846
Expected return on plan assets	(2,133)	(2,095)		(2,236)
Recognized net actuarial loss	675	536		37
Amortization of transition asset	(138)	(132)		(125)
Subtotal - defined benefit plan	595	453		(182)
Net pension and postretirement periodic benefit cost (income)	$ 595	$ 453		$ (182)

[1] Effective during the year ended December 31, 2010, an amendment to eliminate coverage for a retiree group and subsidy on prescription drugs costs resulted in an unrecognized prior service cost.