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Employee Benefit Plans - Benefit Payments and Contributions (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
U.S. Pension Plan, Defined Benefit [Member]  
Expected Future Benefit Payments by Fiscal Year [Abstract]  
2017 $ 35,717
2018 37,748
2019 37,233
2020 40,553
2021 41,433
2022 - 2026 194,653
Non-U.S. Pension Plans, Defined Benefit [Member]  
Estimated Future Employer Contributions [Abstract]  
Estimated future employer contributions in next fiscal year 6,500
Expected Future Benefit Payments by Fiscal Year [Abstract]  
2017 6,445
2018 6,478
2019 6,673
2020 6,759
2021 7,563
2022 - 2026 42,412
Supplemental Employee Retirement Plans, Defined Benefit [Member]  
Estimated Future Employer Contributions [Abstract]  
Estimated future employer contributions in next fiscal year 5,600
Expected Future Benefit Payments by Fiscal Year [Abstract]  
2017 20,428
2018 6,762
2019 9,401
2020 7,054
2021 14,671
2022 - 2026 30,670
Other Postretirement Benefit Plans, Defined Benefit [Member]  
Expected Future Benefit Payments by Fiscal Year [Abstract]  
2017 873
2018 890
2019 909
2020 935
2021 934
2022 - 2026 $ 4,955