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Pension Plans And Other Postretirement Benefits (Summary Of Components Of Net Periodic Benefit Cost) (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]      
Actuarial net loss (gain) $ 44,629 $ (9,892) $ (633)
Prior service cost   1,242 56
Settlement loss     (241)
Amortization of transition asset (obligation) (53) (15) (12)
Amortization of actuarial net (loss) gain (3,745) (4,225) (3,696)
Amortization of prior service cost (398) (387) (375)
U.S. Pension Plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 7,055 6,755 5,720
Interest cost 9,079 8,559 7,934
Expected return on plan assets (11,445) (9,689) (8,592)
Amortization of prior service cost 306 292 289
Amortization of actuarial net loss (gain) 3,203 3,371 2,497
Net periodic benefit cost 8,198 9,288 7,848
Actuarial net loss (gain) 37,484 (7,530) 862
Prior service cost 0 1,193 0
Amortization of actuarial net (loss) gain (3,203) (3,371) (2,497)
Amortization of prior service cost (306) (292) (289)
Total recognized in other comprehensive income (loss) 33,975 (10,000) (1,924)
Total recognized in net periodic benefit cost and other comprehensive income (loss) 42,173 (712) 5,924
U.S. Postretirement Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 1,514 1,336 1,085
Interest cost 3,158 3,277 3,408
Expected return on plan assets (1,595) (1,627) (1,636)
Amortization of prior service cost 8 9 9
Amortization of actuarial net loss (gain) (602) (439) (453)
Net periodic benefit cost 2,483 2,556 2,413
Actuarial net loss (gain) 5,072 (1,754) 704
Prior service cost 0 0 0
Amortization of actuarial net (loss) gain 602 439 453
Amortization of prior service cost (8) (9) (9)
Total recognized in other comprehensive income (loss) 5,666 (1,324) 1,148
Total recognized in net periodic benefit cost and other comprehensive income (loss) 8,149 1,232 3,561
Foreign Pension Plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 4,510 3,015 2,543
Interest cost 5,881 5,447 5,010
Expected return on plan assets (6,365) (5,344) (3,918)
Amortization of prior service cost 84 86 77
Amortization of transition (asset) obligation 0 (37) (35)
Amortization of actuarial net loss (gain) 1,083 1,240 1,618
Settlement loss 0 0 241
Net periodic benefit cost 5,193 4,407 5,536
Actuarial net loss (gain) 2,447 (723) (2,720)
Prior service cost 0 49 56
Settlement loss 0 0 (241)
Amortization of transition asset (obligation) 0 37 35
Amortization of actuarial net (loss) gain (1,083) (1,240) (1,618)
Amortization of prior service cost (84) (86) (77)
Total recognized in other comprehensive income (loss) 1,280 (1,963) (4,565)
Total recognized in net periodic benefit cost and other comprehensive income (loss) 6,473 2,444 971
Foreign Postretirement Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 30 25 13
Interest cost 153 146 142
Expected return on plan assets 0 0 0
Amortization of prior service cost 0 0 0
Amortization of transition (asset) obligation 53 52 47
Amortization of actuarial net loss (gain) 61 53 34
Settlement loss 0 0 0
Net periodic benefit cost 297 276 236
Actuarial net loss (gain) (374) 115 521
Prior service cost 0 0 0
Settlement loss 0 0 0
Amortization of transition asset (obligation) (53) (52) (47)
Amortization of actuarial net (loss) gain (61) (53) (34)
Amortization of prior service cost 0 0 0
Total recognized in other comprehensive income (loss) (488) 10 440
Total recognized in net periodic benefit cost and other comprehensive income (loss) $ (191) $ 286 $ 676