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Employee Benefit Plans (Details 2)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
bond
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Noncurrent liabilities $ 241,972 $ 350,889  
U.S. Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 325,319 283,571  
Service cost 2,889 2,233 $ 2,565
Interest cost 12,357 12,868 11,767
Plan participants' contributions 0 0  
Amendments 0 0  
Actuarial loss (14,417) 49,939  
Settlements/curtailments 0 0  
Benefits paid (18,758) (23,292)  
Effect of foreign currency 0 0  
Other 0 0  
Benefit obligation at end of year 307,390 325,319 283,571
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 233,350 233,579  
Actual return on plan assets (8,011) 15,465  
Employer contributions 2,289 7,598  
Plan participants' contributions 0 0  
Settlements/curtailments 0 0  
Benefits paid (18,758) (23,292)  
Effect of foreign currency 0 0  
Fair value of plan assets at end of year 208,870 233,350 $ 233,579
Funded status at end of year (98,520) (91,969)  
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Noncurrent assets 229 615  
Current liabilities 2,072 2,102  
Noncurrent liabilities 96,678 90,482  
Total accumulated other comprehensive loss before tax 162,571 157,165  
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]      
Net actuarial loss 162,475 156,989  
Prior service cost 96 176  
Total accumulated other comprehensive loss before tax 162,571 $ 157,165  
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]      
Net actuarial loss 5,489    
Prior service cost 63    
Total 5,552    
Estimate of expected contributions in next fiscal year 2,100    
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]      
2016 19,100    
2017 19,100    
2018 18,900    
2019 18,700    
2020 18,800    
2021-2025 $ 94,800    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rates 3.90% 4.70% 3.80%
Expected long-term rates of return on plan assets 7.50% 7.50% 7.50%
Rates of compensation increase 3.00% 3.00% 3.00%
Expected long-term rates of return on plan assets for next year (as a percent) 7.30%    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rates 4.20% 3.90%  
Rates of compensation increase 3.00% 3.00%  
Number of U.S. dollar-denomincated, AA-graded corporate bonds in yield curve universe | bond 700    
Highest yield U.S. dollar-denominated, AA-graded corporate bonds excluded from yield curve univers (as a percent) 10.00%    
Lowest yield U.S. dollar-denominated, AA-graded corporate bonds excluded from yield curve universe (as a percent) 10.00%    
International Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year $ 1,049,603 $ 958,705  
Service cost 1,648 1,610 $ 3,457
Interest cost 36,282 43,230 42,707
Plan participants' contributions 61 75  
Amendments 47 0  
Actuarial loss (85,028) 150,289  
Settlements/curtailments (250) (589)  
Benefits paid (38,197) (41,522)  
Effect of foreign currency (64,062) (62,250)  
Other 0 55  
Benefit obligation at end of year 900,104 1,049,603 958,705
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 791,045 770,911  
Actual return on plan assets 22,602 80,518  
Employer contributions 27,402 28,112  
Plan participants' contributions 61 75  
Settlements/curtailments (250) 0  
Benefits paid (38,197) (41,522)  
Benefits paid (37,693) (40,948)  
Effect of foreign currency (47,201) (47,623)  
Fair value of plan assets at end of year 755,966 791,045 $ 770,911
Funded status at end of year (144,138) (258,558)  
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Noncurrent assets 1,229 1,746  
Current liabilities 479 524  
Noncurrent liabilities 144,888 259,780  
Total accumulated other comprehensive loss before tax 376,641 479,382  
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]      
Net actuarial loss 375,725 478,396  
Prior service cost 916 986  
Total accumulated other comprehensive loss before tax 376,641 $ 479,382  
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]      
Net actuarial loss 13,139    
Prior service cost 173    
Total 13,312    
Estimate of expected contributions in next fiscal year 21,600    
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]      
2016 39,700    
2017 40,300    
2018 41,200    
2019 42,600    
2020 44,500    
2021-2025 $ 244,400    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rates 3.70% 4.70% 4.30%
Expected long-term rates of return on plan assets 6.80% 6.80% 6.60%
Rates of compensation increase 3.20% 3.40% 2.80%
Expected long-term rates of return on plan assets for next year (as a percent) 6.50%    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rates 3.80% 3.70%  
Rates of compensation increase 3.20% 3.20%  
Global Weighted-Average      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rates 3.70% 4.70% 4.20%
Expected long-term rates of return on plan assets 7.00% 7.00% 6.80%
Rates of compensation increase 3.20% 3.40% 2.80%
Expected long-term rates of return on plan assets for next year (as a percent) 6.70%    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rates 3.90% 3.70%  
Rates of compensation increase 3.20% 3.20%