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Benefit Plans Benefit Plans (Detail 3) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Plan amendments and prior service cost $ (30,142)  
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost Credit, after Tax (23,079)  
Actuarial losses (gains) 319,770  
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), after tax 235,350  
Accumulated Other Comprehensive Income (Loss), before Tax 289,628 $ 284,035
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax 212,271  
United States Pension Plans of US Entity, Defined Benefit [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Plan amendments and prior service cost 0  
Actuarial losses (gains) 83,347  
Accumulated Other Comprehensive Income (Loss), before Tax 83,347 85,636
Foreign Pension Plans, Defined Benefit [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Plan amendments and prior service cost (27,114)  
Actuarial losses (gains) 243,338  
Accumulated Other Comprehensive Income (Loss), before Tax 216,224 213,702
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Plan amendments and prior service cost (3,028)  
Actuarial losses (gains) (6,915)  
Accumulated Other Comprehensive Income (Loss), before Tax $ (9,943) $ (15,303)