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Net Periodic Benefit Cost-Defined Benefit Plans (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Apr. 01, 2016
Pension Benefits-U.S. Plans: [Member]    
Service cost $ 46 $ 48
Interest cost 3,879 4,352
Expected return on plan assets (5,339) (6,121)
Amortization 1,619 1,615
Net periodic benefit cost (income) 205 (106)
Pension Benefits-Non U.S. Plans: [Member]    
Service cost 945 835
Interest cost 6,512 8,444
Expected return on plan assets (6,573) (8,221)
Amortization 990 418
Net periodic benefit cost (income) 1,874 1,476
Other Post-Retirement Benefits: [Member]    
Service cost 10 16
Interest cost 243 312
Amortization (100) 64
Net periodic benefit cost (income) $ 153 $ 392