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Benefit Plans Benefit Plans (Detail 1) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair Value of Plan Assets, Ending $ 825,774 $ 753,030  
United States Pension Plans of US Entity, Defined Benefit [Member]
     
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit Obligation, Beginning 146,492 125,340  
Service Cost and Other 455 331  
Interest Cost 6,093 6,422 6,439
Actuarial Net (Gains) Losses 10,184 20,596  
Plan Amendments 0 0  
Benefits Paid (6,420) (6,197)  
Foreign Currency Exchange Rate Changes, Benefit Obligation 0 0  
Benefit Obligation, Ending 156,804 146,492 125,340
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair Value of Plan Assets, Beginning 87,904 97,040  
Actual Return on Plan Assets 9,501 (3,004)  
Contributions by Employer 3,749 65  
Contributions by Plan Participants 0 0  
Benefits Paid and Other Charges (6,420) (6,197)  
Foreign Currency Exchange Rate Changes, Plan Assets 0 0  
Fair Value of Plan Assets, Ending 94,734 87,904 97,040
Funded Status of Plan (62,070) (58,588)  
Foreign Pension Plans, Defined Benefit [Member]
     
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit Obligation, Beginning 717,503 661,029  
Service Cost and Other 27,312 27,194  
Interest Cost 22,104 24,637 22,438
Actuarial Net (Gains) Losses 68,807 33,834  
Plan Amendments (21,915) (444)  
Benefits Paid (36,861) (22,482)  
Foreign Currency Exchange Rate Changes, Benefit Obligation 21,707 (6,265)  
Benefit Obligation, Ending 798,657 717,503 661,029
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair Value of Plan Assets, Beginning 665,126 667,124  
Actual Return on Plan Assets 47,797 (13,604)  
Contributions by Employer 22,309 22,197  
Contributions by Plan Participants 12,315 13,290  
Benefits Paid and Other Charges (36,861) (23,217)  
Foreign Currency Exchange Rate Changes, Plan Assets 20,354 (664)  
Fair Value of Plan Assets, Ending 731,040 665,126 667,124
Funded Status of Plan (67,617) (52,377)  
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
     
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit Obligation, Beginning 13,257 14,608  
Service Cost and Other 333 304  
Interest Cost 539 731 757
Actuarial Net (Gains) Losses (2,059) (1,971)  
Plan Amendments 75 558  
Benefits Paid (878) (973)  
Foreign Currency Exchange Rate Changes, Benefit Obligation 0 0  
Benefit Obligation, Ending 11,267 13,257 14,608
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair Value of Plan Assets, Beginning 0 0  
Actual Return on Plan Assets 0 0  
Contributions by Employer 803 875  
Contributions by Plan Participants 75 98  
Benefits Paid and Other Charges (878) (973)  
Foreign Currency Exchange Rate Changes, Plan Assets 0 0  
Fair Value of Plan Assets, Ending 0 0 0
Funded Status of Plan $ (11,267) $ (13,257)