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Employee Benefit Plans (Details 2)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
bond
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Noncurrent liabilities $ 319,597 $ 241,972  
U.S. Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 307,390 325,319  
Service cost 3,783 2,889 $ 2,233
Interest cost 10,165 12,357 12,868
Plan participants' contributions 0 0  
Amendments 0 0  
Actuarial loss 5,223 (14,417)  
Settlements/curtailments 0 0  
Benefits paid (20,909) (18,758)  
Effect of foreign currency 0 0  
Benefit obligation at end of year 305,652 307,390 325,319
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 208,870 233,350  
Actual return on plan assets 15,289 (8,011)  
Employer contributions 2,021 2,289  
Plan participants' contributions 0 0  
Settlements/curtailments 0 0  
Benefits paid (20,909) (18,758)  
Effect of foreign currency 0 0  
Fair value of plan assets at end of year 205,271 208,870 $ 233,350
Funded status at end of year (100,381) (98,520)  
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Noncurrent assets 668 229  
Current liabilities 2,278 2,072  
Noncurrent liabilities 98,771 96,678  
Total accumulated other comprehensive loss before tax 161,075 162,571  
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]      
Net actuarial loss 161,042 162,475  
Prior service cost 33 96  
Total accumulated other comprehensive loss before tax 161,075 $ 162,571  
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 5,701    
Prior service cost 33    
Total 5,734    
Estimate of expected contributions in next fiscal year 6,300    
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]      
2017 19,800    
2018 19,300    
2019 19,000    
2020 19,000    
2021 19,000    
2022-2026 $ 95,000    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rates 4.20% 3.90% 4.70%
Expected long-term rates of return on plan assets 7.30% 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 4.00% 4.20%  
Rates of compensation increase 0.00% 3.00%  
Number of U.S. dollar-denominated, AA-graded corporate bonds in yield curve universe | bond 0    
Highest yield U.S. dollar-denominated, AA-graded corporate bonds excluded from yield curve universe (as a percent) 0.00%    
Lowest yield U.S. dollar-denominated, AA-graded corporate bonds excluded from yield curve universe (as a percent) 0.00%    
International Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year $ 900,104 $ 1,049,603  
Service cost 1,585 1,648 $ 1,610
Interest cost 26,822 36,282 43,230
Plan participants' contributions 68 61  
Amendments 0 47  
Actuarial loss 194,469 (85,028)  
Settlements/curtailments (1,527) (250)  
Benefits paid (32,079) (38,197)  
Effect of foreign currency (137,082) (64,062)  
Benefit obligation at end of year 952,360 900,104 1,049,603
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 755,966 791,045  
Actual return on plan assets 105,027 22,602  
Employer contributions 17,192 27,402  
Plan participants' contributions 68 61  
Settlements/curtailments (1,527) (250)  
Benefits paid (32,079) (38,197)  
Benefits paid (31,485) (37,693)  
Effect of foreign currency (112,498) (47,201)  
Fair value of plan assets at end of year 732,743 755,966 $ 791,045
Funded status at end of year (219,617) (144,138)  
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Noncurrent assets 1,118 1,229  
Current liabilities 505 479  
Noncurrent liabilities 220,230 144,888  
Total accumulated other comprehensive loss before tax 434,868 376,641  
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]      
Net actuarial loss 433,626 375,725  
Prior service cost 1,242 916  
Total accumulated other comprehensive loss before tax 434,868 $ 376,641  
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 15,627    
Prior service cost 175    
Total 15,802    
Estimate of expected contributions in next fiscal year 16,600    
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]      
2017 32,700    
2018 33,600    
2019 34,500    
2020 35,900    
2021 37,400    
2022-2026 $ 203,200    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rates 3.80% 3.70% 4.70%
Expected long-term rates of return on plan assets 6.50% 6.80% 6.80%
Rates of compensation increase 3.20% 3.20% 3.40%
Expected long-term rates of return on plan assets for next year (as a percent) 5.90%    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rates 2.80% 3.80%  
Rates of compensation increase 3.30% 3.20%  
Global Weighted-Average      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rates 3.90% 3.70% 4.70%
Expected long-term rates of return on plan assets 6.70% 7.00% 7.00%
Rates of compensation increase 3.20% 3.20% 3.40%
Expected long-term rates of return on plan assets for next year (as a percent) 6.20%    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rates 3.10% 3.90%  
Rates of compensation increase 3.30% 3.20%